Detailed Description
The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.
The terms "first," "second," and the like, herein, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the "first" and "second" distinguishing between objects generally are not limited in number to the extent that the first object may, for example, be one or more. Furthermore, the "or" in the present application means at least one of the connected objects. For example, "A or B" encompasses three schemes, namely scheme one including A and excluding B, scheme two including B and excluding A, scheme three including both A and B. The character "/" generally indicates that the context-dependent object is an "or" relationship.
The term "indication" according to the application may be either a direct indication (or an explicit indication) or an indirect indication (or an implicit indication). The direct indication may be understood that the sender explicitly informs the specific information of the receiver, the operation to be executed, the request result, and the like in the sent indication, and the indirect indication may be understood that the receiver determines the corresponding information according to the indication sent by the sender, or determines the operation to be executed, the request result, and the like according to the determination result.
It should be noted that the techniques described in the embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single-carrier frequency division multiple access (Single-carrier Frequency-Division Multiple Access, SC-FDMA), or other systems. The terms "system" and "network" in embodiments of the application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New Radio (NR) system for exemplary purposes and NR terminology is used in much of the following description, but the techniques may also be applied to systems other than NR systems, such as the 6 th Generation (6G) communication system.
Fig. 1 shows a block diagram of a wireless communication system to which an embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may be a Mobile phone, a tablet Computer (Tablet Personal Computer), a Laptop (Laptop Computer), a notebook, a Personal digital assistant (Personal DIGITAL ASSISTANT, PDA), a palm Computer, a netbook, an Ultra-Mobile Personal Computer (Ultra-Mobile Personal Computer, UMPC), a Mobile internet appliance (Mobile INTERNET DEVICE, MID), an augmented Reality (Augmented Reality, AR), a Virtual Reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (FLIGHT VEHICLE), a vehicle-mounted device (Vehicle User Equipment, VUE), a ship-mounted device, a pedestrian terminal (PEDESTRIAN USER EQUIPMENT, PUE), a smart home (home device with a wireless communication function, such as a refrigerator, a television, a washing machine, or furniture), a game machine, a Personal Computer (Personal Computer, PC), a teller machine, or a self-service machine, and other terminal-side devices. The wearable device comprises an intelligent watch, an intelligent bracelet, an intelligent earphone, intelligent glasses, intelligent jewelry (intelligent bracelets, intelligent rings, intelligent necklaces, intelligent anklets, intelligent footchains and the like), an intelligent wristband, intelligent clothing and the like. The in-vehicle apparatus may also be referred to as an in-vehicle terminal, an in-vehicle controller, an in-vehicle module, an in-vehicle component, an in-vehicle chip, an in-vehicle unit, or the like. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application.
The network-side device 12 may include an access network device or core network device, where the access network device may also be referred to as a radio access network (Radio Access Network, RAN) device, a radio access network function, or a radio access network element. The Access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) Access Point (AP), or a wireless fidelity (WIRELESS FIDELITY, WIFI) node, etc. The base station may be referred to as a Node B (NB, NB), an Evolved Node B (eNB), a next generation Node B (the next generation Node B, gNB), a New air Node B (New Radio Node B, NR Node B), an access point, a relay station (Relay Base Station, RBS), a serving base station (Serving Base Station, SBS), a base transceiver station (Base Transceiver Station, BTS), a Radio base station, a Radio transceiver, a Basic service set (Basic SERVICE SET, BSS), an Extended service set (Extended SERVICE SET, ESS), a Home Node B (HNB), a home Evolved Node B (home Evolved Node B), a transmission and reception point (Transmission Reception Point, TRP), or some other suitable term in the art, so long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary, and in the embodiment of the present application, the base station in the NR system is only described by way of example, and the specific type of the base station is not limited.
The core Network device may include, but is not limited to, at least one of a core Network node, a core Network Function, a Mobility management entity (Mobility MANAGEMENT ENTITY, MME), an access Mobility management Function (ACCESS AND Mobility Management Function, AMF), a session management Function (Session Management Function, SMF), a user plane Function (User Plane Function, UPF), a Policy control Function (Policy Control Function, PCF), a Policy AND CHARGING Rules Function (PCRF), an edge application service discovery Function (Edge Application Server Discovery Function, EASDF), a Unified data management (Unified DATA MANAGEMENT, UDM), a Unified data repository (Unified Data Repository, UDR), a home subscriber server (Home Subscriber Server, HSS), a centralized Network configuration (Centralized Network configuration, CNC), a Network storage Function (Network Repository Function, NRF), a Network opening Function (Network Exposure Function, NEF), a Local NEF (or L-NEF), a binding support Function (Binding Support Function, BSF), an application Function (Application Function, AF), a location management Function (Location Management Function, LMF), a gateway's mobile location center (Gateway Mobile Location Centre, GMLC), a Network data analysis Function (NWDAF), and the like. It should be noted that, in the embodiment of the present application, only the core network device in the NR system is described as an example, and the specific type of the core network device is not limited.
In some embodiments, the network-side device and the terminal may have a sensing capability, that is, one or more devices having a sensing capability, in addition to a communication capability, can sense information such as a position, a distance, a speed, etc. of the target object through transmission and reception of wireless signals, or detect, track, identify, image, etc. the target object, an event, an environment, etc. Some perception functions and application scenarios are shown in table 1:
TABLE 1
It should be noted that the above-mentioned sensing categories shown in table 1 are only illustrative, and the sensing categories are not limited in the embodiment of the present application.
In addition, the embodiment of the application can be applied to a communication perception integrated scene, wherein communication perception integration means that communication and perception function integration design is realized through spectrum sharing and hardware sharing in the same system, the system can perceive information such as azimuth, distance, speed and the like while information is transmitted, target equipment or events are detected, tracked and identified, the communication system and the perception system complement each other, and the improvement of overall performance is realized and better service experience is brought.
For example, communication and radar integration belongs to a typical communication perception integration (communication perception fusion) application, and communication and radar system fusion can bring about a plurality of advantages, such as cost saving, size reduction, power consumption reduction, spectrum efficiency improvement, mutual interference reduction and the like, so that the overall performance of the system is improved.
In the embodiment of the present application, according to the difference between the sensing signal transmitting node and the receiving node, the sensing signal transmitting node may include, but is not limited to, 6 sensing links shown in fig. 2. It should be noted that, in fig. 2, each sensing link is illustrated by using one transmitting node and one receiving node, in an actual system, different sensing links may be selected according to different sensing requirements, one or more transmitting nodes and one or more receiving nodes of each sensing link may be provided, and the actual sensing system may include a plurality of different sensing links. And the perception target in fig. 2 takes a person and a car as examples, and the perception target of an actual scene is richer assuming that neither the person nor the car carries or installs the signal receiving/transmitting device.
Perception link 1, base station self-receiving perception. In the mode, the base station transmits a sensing signal and obtains a sensing result by receiving an echo of the sensing signal;
And a perception link 2, namely the air interface perception between the base stations. In this manner, the base station 2 receives the sensing signal transmitted by the base station 1, and obtains a sensing result.
And a perception link 3, namely uplink air interface perception. In the mode, the base station receives the sensing signal sent by the terminal, and a sensing result is obtained.
And a perception link 4, namely downlink air interface perception. In the mode, the terminal receives the sensing signal sent by the base station, and a sensing result is obtained.
And a perception link 5, namely the terminal spontaneously self-receives perception. In the mode, the terminal sends a sensing signal and obtains a sensing result by receiving an echo of the sensing signal.
Perception link 6. Inter-terminal side link (Sidelink) perception. For example, the terminal 2 receives the sensing signal transmitted by the terminal 1 to obtain a sensing result, or the terminal 1 receives the sensing signal transmitted by the terminal 2 to obtain a sensing result.
In some embodiments, signaling between the radio Access network device and the terminal, different terminals may be through radio resource control (Radio Resource Control, RRC) signaling or media Access control (Medium Access Control Control Element, MAC CE) signaling or layer 1 signaling or other newly defined awareness signaling, signaling between the awareness network function and the terminal may be through Non-Access-Stratum (NAS) signaling (forwarding via AMF) or through RRC signaling or MAC CE or layer 1 signaling or other newly defined awareness signaling, interaction between the awareness network function and the base station may be through an N2 interface forwarding to the radio Access network using AMF, or core network awareness network function may be sent to the UPF, which is sent to the radio Access network through an N3 interface, or to the radio Access network (e.g., base station) through a newly defined interface, and signaling between the radio Access network devices may be through an Xn interface.
In some embodiments, the network-aware Function may also be called a network-aware element or a network-aware management Function (SENSING MANAGEMENT Function, SENSING MF), which may be located at the RAN side or the core network side, and refers to a network node in the core network or the RAN that is responsible for at least one Function such as processing a sensing request, scheduling a sensing resource, sensing information interaction, and sensing data processing, and may be based on AMF or LMF upgrade in the mobile communication network, or may be another network node or a newly defined network node, and specifically, the functional characteristics of the network-aware Function/network-aware element may include at least one of the following:
And performing target information interaction with the wireless signal transmitting device or the wireless signal measuring device (including a target terminal or a serving base station of the target terminal or a base station associated with a target area), wherein the target information comprises a sensing processing request, sensing capability, sensing auxiliary data, sensing measurement quantity type, sensing resource configuration information and the like, so as to obtain a target sensing result or a value of a sensing measurement quantity (uplink measurement quantity or downlink measurement quantity) transmitted by the wireless signal measuring device, and the wireless signal can be also called a sensing signal.
The sensing method used is determined according to the type of the sensing service, the information of the consumer of the sensing service, the required information of the sensing service quality (Quality of Service, qoS) requirement, the sensing capability of the wireless signal transmitting equipment, the sensing capability of the wireless signal measuring equipment and the like, and the sensing method can comprise the steps that the wireless access network equipment A transmits the wireless access network equipment B to be received, or the wireless access network equipment transmits the terminal to be received, or the wireless access network equipment A transmits the terminal to be received automatically, or the terminal A transmits the terminal B to be received, and the like.
And determining a sensing device serving the sensing service according to the type of the sensing service, the information of a sensing service consumer, the required sensing QoS requirement information, the sensing capability of the wireless signal transmitting device, the sensing capability of the wireless signal measuring device and the like, wherein the sensing device comprises the wireless signal transmitting device or the wireless signal measuring device.
Managing the overall coordination and scheduling of resources required by the awareness service, such as corresponding configuration of the awareness resources of the wireless access network equipment or the terminal;
and carrying out data processing on the value of the perception measurement quantity or calculating to obtain a perception result. And also can verify the perceived result, estimate perceived accuracy, etc.
The following describes in detail a signal sending method, a signal measuring device and a signal sending equipment provided by the embodiments of the present application through some embodiments and application scenarios thereof with reference to the accompanying drawings.
Referring to fig. 3, fig. 3 is a flowchart of a signal transmission method according to an embodiment of the present application, as shown in fig. 3, including the following steps:
Step 301, a first device sends a target signal, wherein the target signal is used for measurement;
Wherein the target signal comprises an M-segment Chirp (Chirp) signal, M being a positive integer greater than 1;
For two adjacent segments of the M segments of the Chirp signals, the starting frequency of the next segment of the Chirp signal is the ending frequency of the previous segment of the Chirp signal, and the frequency modulation slopes of the two adjacent segments of the Chirp signals are different.
The first device may be a terminal or a network side device.
The transmission target signal may be a transmission target signal to a second device, which may be a terminal or a network-side device, and the second device may perform measurement. Or the first device performs measurement on the target signal, such as self-receiving measurement by the first device.
The measurement of the target signal may comprise a perceptually relevant measurement or a communicatively relevant measurement, i.e. the measurement of the target signal comprises at least one of a perceptually relevant measurement and a communicatively relevant measurement. Wherein the perceptually relevant measurements may comprise values of perceptually measured quantities and the communications relevant measurements may comprise communications channel measurements or channel estimates. The communication-related measurement results may include at least one of:
precoding matrix indicator (Precoding Matrix Indicator, PMI), rank Indicator (RI), channel Quality indicator (Channel Quality Indicator, CQI), reference signal received Power (REFERENCE SIGNAL RECEIVED Power, RSRP), reference signal received Quality (REFERENCE SIGNAL RECEIVED Quality, RSRQ), received signal strength indicator (RECEIVED SIGNAL STRENGTH Indication, RSSI), signal-to-noise ratio (Signal to Noise Ratio, SNR), signal-to-interference-plus-noise ratio (Signal to Interference plus Noise Ratio, SINR), bit Error Rate (BER), block Error Rate (BLER), beam Indication.
The perception performance or the communication performance can be improved through the target signal.
The above-mentioned two adjacent Chirp signals in the M-segment Chirp signal, the initial frequency of the latter Chirp signal being the final frequency of the former Chirp signal, is understood to be that, in the two adjacent Chirp signals in the M-segment Chirp signal, the initial frequency of the latter Chirp signal is the final frequency of the former Chirp signal, i.e. the M-segment Chirp signals are continuous in frequency domain and do not overlap with each other, i.e. the initial frequency of each Chirp signal is the final frequency of the last Chirp signal, e.g.Representing the start frequency of the i-th segment Chirp signal,Represents the ending frequency of the i-1 th segment Chirp signal.
The two adjacent Chirp signals may be any two adjacent Chirp signals, or may be one or more pairs of two adjacent Chirp signals, that is, in some embodiments, some two adjacent Chirp signals may be allowed to not satisfy the above relationship.
The different frequency modulation slopes of the two adjacent segments of Chirp signals may be different from each other, and the specific value may be set according to actual requirements, or the protocol convention, etc. is not limited to this. In addition, the polarities of the Chirp rates of two adjacent Chirp signals may be the same or different, such as both positive polarities or both negative polarities. In the case where the polarities of the frequency modulation slopes of the two adjacent Chirp signals are both positive, as shown in fig. 4, and in the case where the polarities of the frequency modulation slopes of the two adjacent Chirp signals are both negative, as shown in fig. 5, where f01 represents the termination frequency of the previous Chirp signal. Wherein, the fig. 4 and 5 are illustrated by taking m=2 as an example. As shown in FIG. 4 or FIG. 5, the target signal comprises two Chirp signals, namely a first Chirp signal and a second Chirp signal, wherein the termination frequency of the first Chirp signal is equal to the initial frequency of the second Chirp signal, namelyBandwidth of target signal
In some embodiments, the sum of the Chirp rates of the first and second segments of Chirp signals may satisfy k0+k1＝B/TChirp, where TChirp represents the duration of the first or second segments of Chirp signals.
In the embodiment of the application, the measurement based on the M-segment Chirp signal can be realized through the steps, and the Chirp signal has the characteristic of low peak-to-average ratio, so that the peak-to-average ratio during measurement can be reduced by sending the target signal for measurement, and the measurement performance of the equipment is improved.
In addition, because two adjacent segments of Chirp signals in the M segments of Chirp signals, the initial frequency of the next segment of Chirp signal is the final frequency of the previous segment of Chirp signal, and the frequency modulation slopes of the two adjacent segments of Chirp signals are different, the flexibility of target signal design can be improved, the interference among different target signals can be reduced, and the measurement performance can be further improved.
In some embodiments, in the measurement process, the target signal is received in a time domain mixing mode, so that the complexity of the receiving process is reduced and self-interference suppression is facilitated.
As an alternative embodiment, the generation expression of the i-th segment Chirp signal in the M-segment Chirp signals may be as follows:
Wherein A0 is the amplitude,For the initial frequency of the i-th Chirp signal, ki＝Bi/Ti or ki＝-Bi/Ti represents the frequency modulation slope of the i-th Chirp signal, Bi represents the bandwidth of the i-th Chirp signal, Ti represents the duration of the i-th Chirp signal, and T is the time domain sampling point.
In another or as an alternative embodiment, the generation expression of the ith Chirp signal in the M-segment Chirp signals may be as follows:
Wherein, θi ε [0,2π ] is a phase factor, which can be a constant phase value or a phase value determined according to some modulation rule.
In the embodiment of the application, the value of i can be 0 to M-1, namely (0≤i≤M-1), or the value of i can be 1 to M, which is not limited.
The i-th segment Chirp signal may represent each of the M segments of the Chirp signal, e.g., i may have a value of 0 to M-1, or in some embodiments, may represent only a partial segment of the M segments of the Chirp signal.
As an alternative embodiment, the M-segment Chirp signal has at least one of the following characteristics:
the sum of bandwidths of the M segments of Chirp signals is equal to the bandwidth of the target signal;
The polarity of the frequency modulation slope of the M-segment Chirp signals is the same;
the sum of the frequency modulation slopes of the M-segment Chirp signals satisfiesTi is the frequency modulation slope of the ith Chirp signal, B is the bandwidth of the target signal, Ti is the duration of the ith Chirp signal, and TChirp is the sum of the durations of the M Chirp signals;
the sum of the duration of the M segments of Chirp signals is equal to the duration of the target signal;
The duration of the M-segment Chirp signals is the same;
the duration of each of the M segments of Chirp signals is the same as the duration of an OFDM symbol, where the OFDM symbol includes a Cyclic Prefix (CP) or does not include a CP.
The sum of the bandwidths of the M segments of Chirp signals is equal to the bandwidth of the target signal can be expressed asWherein Bi represents the bandwidth of the i-th segment Chirp signal, and B represents the bandwidth of the target signal.
The polarity of the Chirp rate of the M-segment Chirp signal means that the polarity of the Chirp rate is the same, i.e., the polarity of the Chirp rate of each segment Chirp signal is the same, for example, ki >0, i=0, 1. Where ki denotes the Chirp rate of the i-th segment Chirp signal. It should be noted that this is to say that the polarities of the Chirp rates are the same, and the values of the Chirp rates of the M-segment Chirp signals may be different.
In the alternative embodiment, since the polarities of the fm slopes of the M-segment Chirp signals are the same, the complexity of the target signal may be reduced to reduce the complexity of measurement.
The sum of the frequency modulation slopes of the M-segment Chirp signals satisfiesTherefore, the frequency modulation slope of the M-segment Chirp signals can be related to the bandwidth of the target signal, the duration of the i-th segment Chirp signals or the duration average value of the M-segment Chirp signals, so that the cross-correlation performance among the M-segment Chirp signals is improved, and interference is reduced.
The sum of the duration of the M-segment Chirp signal is equal to the duration of the target signal can be expressed asWhere T is the duration of the target signal.
The duration of the M-segment Chirp signal described above is the same and may be expressed as Ti＝TChirp, i=0, 1.
Where TChirp＝TOFDM+TCP is represented when the OFDM symbol includes a CP, and TChirp＝TOFDM is represented when the OFDM symbol does not include a CP.
As shown in fig. 4 or fig. 5, the target signal occupies two OFDM symbols t=2tChirp in the time domain, and the duration of each Chirp signal is the same as the duration of the OFDM symbol (including CP). It may be that the duration of each Chirp signal is the same as the duration of the OFDM symbol (without CP), then a CP is added in front of the first signal, and the total duration after adding the CP is equal to the duration of two OFDM symbols (with CP).
Where the duration of each Chirp signal is the same as the duration of the OFDM symbol containing CP, this may allow for a longer duration of each Chirp signal to convey more information.
And under the condition that the duration of each section of Chirp signal is the same as the duration of the OFDM symbol without the CP, the CP can be added to each section of Chirp signal after the time domain resource mapping is carried out, and the CP can be added to reduce the interference among the OFDM symbols so as to improve the transmission reliability of the target signal.
The M-segment Chirp signal has at least one of the following characteristics, and in the alternative embodiment, only a portion of the M-segment Chirp signal may satisfy the at least one of the characteristics, but not all of the M-segment Chirp signal may satisfy the at least one of the characteristics. For example, as shown in fig. 6, the total duration of the M-segment Chirp signal is the same as the OFDM symbol duration.
As an alternative embodiment, the first parameter of at least one of the M segments of Chirp signals is associated with target information, which includes at least one of the following:
Perceptual information, time domain resource information, frequency domain resource information, antenna port index, number of antenna ports, code division multiplexing CDM group index, number of CDM groups, antenna index, number of antennas, codeword index.
The at least one Chirp signal may represent all or part of the M-segment Chirp signal.
In some embodiments, the first parameter of the at least one piece of Chirp signal includes at least one of:
frequency modulation slope, start frequency point, end frequency point, bandwidth.
The association of the first parameter of the at least one Chirp signal with the target information may be understood as the first parameter of the at least one Chirp signal being determined according to the target information, such that the first parameter of the target signal may be more matched with the target information.
The above-mentioned perception information may include at least one of the following:
The device comprises a sensing area identifier, an identifier for indicating whether the sensing area identifier is used for sensing, a sensing service identifier, a sensing service type identifier, a sensing target identifier, a Tag (Tag) identifier associated with the sensing target, the number of the sensing targets and device information participating in sensing measurement.
The device information may be a device identifier, such as a cell identifier or a terminal identifier of a device participating in the sensing measurement, such as a radio network temporary identifier (Radio Network Temporary Identifier, RNTI).
In an optional embodiment, since the first parameter is associated with the sensing information, at least one of a frequency modulation slope, a start frequency point, an end frequency point or a bandwidth can be matched with the sensing information, so that a target is more matched with the sensing, and the sensing performance is improved.
The time domain resource information may include one of:
a radio frame index, a subframe index, a time slot (slo) t index, a symbol index, a duration, a time domain density, a cyclic prefix CP type, a CP length, a coherent processing time window index, a coherent processing time window number.
The radio frame index and the subframe index may be radio frame indexes and subframe indexes defined by a communication system, or the radio frame indexes and the subframe indexes may be relative radio frame indexes and subframe indexes in a perception coherent processing time window/a perception resource block;
The slot index may be a slot index within a radio frame or a slot index within a coherent processing time window/perceived resource block;
the symbol index may be an intra-slot symbol index or an intra-coherent processing time window/perceptual resource block symbol index.
The coherent processing time window (for example, a time window in which a two-dimensional FFT operation is performed to obtain a time domain resource length corresponding to a distance-doppler plot) may include a plurality of slots/symbols.
The frequency domain resource information may include at least one of:
A Resource Element (RE) index, a Resource Block (RB) index, frequency point information, frequency band information, bandwidth, frequency domain density, subcarrier spacing, and a perceived Resource Block index, where the perceived Resource Block includes a plurality of physical Resource blocks (Physical Resource Block, PRBs) and a plurality of time slots/symbols, that is, includes a specific time-frequency domain Resource, for example, a two-dimensional FFT operation is performed to obtain a frequency domain Resource length and a time domain Resource length corresponding to the distance-doppler map.
The index of the Chirp signal i is the index i of the Chirp signal i in the target signal.
The antenna index may be an antenna group index, a sub-array index, or an antenna panel index, and the number of antennas may be an antenna group number, a sub-array, or an antenna panel number.
In an alternative embodiment, the first parameter is associated with the target information, so that the first parameter of the Chirp signal i can be more matched with the target information, for example, the transmission performance of the target signal is improved.
In the following, in an embodiment, the frequency modulation slope, the start frequency point, the end frequency point or the bandwidth of the first Chirp signal and the second Chirp signal are illustrated as follows, where in the embodiment of the present application, the first Chirp signal may be understood as a previous Chirp signal in two adjacent Chirp signals, and the second Chirp signal may be understood as a subsequent Chirp signal in two adjacent Chirp signals, or may be applied to a scenario where M is 2. The method comprises the following steps:
For example, if the Chirp rate, the start frequency point, the end frequency point, or the bandwidth of the first Chirp signal and the second Chirp signal are associated with the port index N and NID, NID＝0,1,2,…,NID -1 may be the sensing area ID or the sensing service ID in the target information, the Chirp rate of the first Chirp signal in the target signal corresponding to the port N (n=0, 1, the term, N-1) is:
the Chirp rate of the second stage Chirp signal is:
Or the slope of the frequency modulation of the first segment Chirp signal in the target signal corresponding to port N (n=0, 1., N-1) is:
the Chirp rate of the second stage Chirp signal is:
The above formula is taken as an example, and the frequency modulation slope, the termination frequency, the start frequency, the bandwidth of the first-segment Chirp signal and the second-segment Chirp signal can also satisfy other formula relationships or specific mapping rules.
The perceptually relevant information in the target information may include the following:
the sensing area indicated by the sensing area identifier is a target area to be sensed, the sensing area may be divided in advance, and the dividing manner may include the following manners:
Multiple base station coverage areas (cells) form a sensing area, and a sensing area identifier nareaID is associated, as shown in fig. 7, where each hexagonal area represents a base station coverage area, and the same numerical area represents the same sensing area. In particular, the access network notification area (RAN-based notification area, RNA) may be defined as a sensing area, and the RNA ID may be defined as the sensing area identification.
Or a single coverage area (cell) of the base station comprises a plurality of sensing areas, a plurality of sensing area identifications are associated, for example, the base station is taken as an origin, the coverage area is rasterized and divided into a plurality of sensing areas, each area is associated with an area ID (identity) as nareaID, as shown in fig. 8, a dotted line represents the coverage area of the base station, and each square represents the divided sensing area.
Or the area IDnareaID may be generated directly by using a geographical area identifier such as longitude and latitude or a coordinate position which is independent of the position of the base station.
Or may be associated with different areas IDnareaID with respect to different angular ranges of the base station, for example, azimuth angles x1 ° to x2 °, pitch angles y1 ° to y2 ° corresponding to the sensing area ID1.
Based on whether the identification is used for sensing, or a specific sensing service identification, or a sensing service type identification is generated, the method comprises the following steps:
Based on the identification of whether or not to be used for sensing, nsensingID =0 when not used for sensing, and nsensingID =1 when used for sensing.
Or, based on specific perceived service identification, for example, different perceived services correspond to different perceived services IDnsensingID.
The awareness traffic may be, for example, the following:
Detecting whether a target exists, positioning, speed detection, distance detection, angle detection, acceleration detection, material analysis, component analysis, shape detection, category division, radar cross-sectional area (Radar Cross Section, RCS) detection, polarized scattering property detection, fall detection, intrusion detection, quantity statistics, indoor positioning, gesture recognition, lip recognition, gait recognition, expression recognition, facial recognition, respiration monitoring, heart rate monitoring, pulse monitoring, humidity/brightness/temperature/barometric pressure monitoring, air quality monitoring, weather condition monitoring, environmental reconstruction, topography, building/vegetation distribution detection, people flow or traffic flow detection, crowd density, vehicle density detection, and the like.
It may also be an identification of a perceived service type, where different classes correspond to different perceived service IDs nsensingID, e.g. dividing perceived functions or service types by a range scale, e.g.:
The first category (short-range/small-range) is material analysis, component analysis, gesture recognition, lip language recognition, gait recognition, expression recognition, facial recognition, respiration monitoring, heart rate monitoring, pulse monitoring and the like;
the second type (medium distance/medium range) is intrusion detection, quantity statistics, indoor positioning and the like;
Third category (remote/large scale) is humidity/brightness/temperature/barometric pressure monitoring, air quality monitoring, weather condition monitoring, environmental reconstruction, topography, building/vegetation distribution detection, traffic or vehicle flow detection, etc.
Other classification criteria may be used, such as classification into positioning class sensing, imaging class sensing, pattern recognition class sensing, etc. according to functions, or classification into detection class sensing services (including intrusion detection, fall detection, for example), parameter estimation class sensing services (distance, angle, speed calculation), recognition class sensing services (action recognition, identity recognition, etc.), or classification into object detection and tracking class sensing services (including object presence, object ranging/angulation/positioning/track tracking), environment monitoring class sensing services (including rainfall detection, flood monitoring, etc.), action detection class sensing services (including gesture/action recognition, respiration/heartbeat detection, fall detection, etc. or classification according to power consumption/energy consumption, classification according to resource occupation, etc.
It is also possible to generate the sensing signal from the measurement quantity identities, i.e. at least one of the sensing measurement quantities is associated with a measurement quantity identity, e.g. as shown in table 2:
Table 2:
| Measurement quantity ID | Sensing measurement quantity |
| ID1 | Time delay/distance |
| ID2 | Doppler/velocity |
| ID3 | Angle of |
| ID4 | Delay/range, doppler/velocity |
| ID4 | Delay/distance, doppler/velocity, angle |
| ... | ... |
The above-mentioned sensing measurement amounts can be divided into the following types:
the first level of measurement (also referred to as received signal/raw channel information) includes at least one of:
Receiving a signal/channel response complex result, amplitude/phase, an I/Q circuit and related operation results (operations comprise addition, subtraction, multiplication, matrix addition, multiplication, matrix transposition, triangular relation operation, square root operation, power operation and the like, threshold detection results of the operation results, maximum/minimum value extraction results and the like, wherein the operations also comprise fast Fourier transform (Fast Fourier Transform, FFT)/inverse fast Fourier transform (INVERSE FAST Fourier Transform, IFFT), discrete Fourier transform (Discrete Fourier Transform, DFT)/inverse discrete Fourier transform (INVERSE DISCRETE Fourier Transform, IDFT), 2D-FFT, 3D-FFT, matched filtering, autocorrelation operation, wavelet transform, digital filtering and the like, and threshold detection results, maximum/minimum value extraction results and the like of the operation results;
a second level measurement (also referred to as a base measurement) comprising at least one of delay, doppler, angle, intensity, and multi-dimensional combined representations thereof;
Third level measurements (also known as basic properties/states) including at least one of distance, velocity, orientation, spatial position, acceleration;
the fourth level of measurement (also known as a further attribute/state) includes at least one of the presence or absence of a target, trajectory, motion, expression, vital sign, quantity, imaging result, weather, air quality, shape, texture, composition.
Determining based on the perceived target identification (or the Tag identification associated with the perceived target) may include the following:
The signal sending device obtains the identification of the perceived target, different perceived targets correspond to different perceived targets IDntargetID, where the determination of the perceived targets may be based on prior information obtained by the existing measurement results, for example, the base station a performs preliminary measurement by sending the perceived measurement signal through an omni-directional beam, the base station a obtains a distance-doppler map (or a distance-angle map, etc.), determines the number of targets according to the distance-doppler map, and assigns an ID to each target, or the base station a performs preliminary measurement by sending the perceived measurement signal through an omni-directional beam, the receiving device (for example, other base stations or terminals) obtains a distance-doppler map (or a distance-angle map, etc.), determines the number of targets according to the distance-doppler map, assigns an ID to each target, and further notifies the transmitting base station of the target ID or the target related information.
After the ID of each target is determined by the signal transmitting equipment, signals for sensing different targets are generated according to different target IDs, the sensing signals are transmitted by adopting different beams, and the beam direction points to the sensing target associated with the target ID;
For the targets to be sensed, the tags are provided with the tags, and different Tag IDs are associated with different tags, and the sending equipment acquires the Tag IDs of the corresponding targets, so that signals for sensing different targets are obtained. The Tag may be a device supporting backscatter communications, the excitation source may be a device other than the Tag, or the excitation source may be the Tag itself. It may also be a terminal, i.e. a sensing target is provided with a common transceiver module, e.g. a car is provided with a communication device, e.g. a car-mounted terminal.
The identification of the perceived object type may also be performed, where different types correspond to different perceived object IDs, e.g. a stationary object and a moving object, the latter may be further divided into a high-speed object and a low-speed object, and different types of objects correspond to different ntargetID.
As an alternative embodiment, the first device transmitting the target signal includes:
and the first equipment transmits the target signal through a plurality of antenna ports, wherein the frequency modulation slopes of the target signals transmitted by different antenna ports are different.
Different antenna ports transmit different target signals, and the different target signals may be that at least one section of Chirp signal included in the target signals has different slopes. For example, the target signals sent by different ports occupy the same time-frequency resource, and the slopes of the Chirp signals of the target signals sent by different ports are different, for example, the slopes of the Chirp signals of each segment are different, which may be specifically as follows:
Wherein, theRepresenting the frequency modulation slope of the i-th Chirp signal in the target signal sent by the n1 port,And the frequency modulation slope of the jth Chirp signal in the target signal sent by the n2 port is shown. Wherein, n1 is not equal to n2, i=j or i+.j.
Wherein the different chirp rate includes different absolute magnitude of the chirp rate or different polarity of the chirp rate.
In the embodiment, the target signal can be realized to support multi-port signal transmission, and different port signals have good cross-correlation performance, so that the interference between terminals is reduced.
Optionally, the time domain or frequency domain resources occupied by the target signals sent by different antenna ports in the plurality of antenna ports are the same.
In the embodiment, the same time domain or frequency domain resources occupied by the target signals sent by different antenna ports can be realized, so that the resource expense is saved.
Optionally, the different frequency modulation slopes of the target signals sent by the different antenna ports include at least one of:
the frequency modulation slopes of the h-th-stage Chirp signals of the target signals transmitted by different antenna ports are different;
The frequency modulation slope of the h-th-segment Chirp signal of the target signal sent by one antenna port of the plurality of antenna ports is different from the frequency modulation slope of the j-th-segment Chirp signal of the target signal sent by other antenna ports;
Wherein h is a positive integer less than or equal to M, j is a positive integer less than or equal to M, and j is not equal to h.
The different frequency modulation slopes of the h-th-segment Chirp signals of the target signal transmitted by the different antenna ports means that the frequency modulation slopes of the Chirp signal segments with the same index or sequence of the different antenna ports are different. For example, the frequency modulation slope of the first Chirp signal in the target signal corresponding to the antenna port A is different from the frequency modulation slope of the first Chirp signal in the target signal corresponding to the port B, and the frequency modulation slope of the second Chirp signal in the target signal corresponding to the port A is different from the frequency modulation slope of the second Chirp signal in the target signal corresponding to the port B. Wherein, the port A and the port B are different ports.
The difference between the frequency modulation slope of the h-th-segment Chirp signal of the target signal sent by one antenna port of the plurality of antenna ports and the frequency modulation slope of the j-th-segment Chirp signal of the target signal sent by the other antenna port means that the frequency modulation slope of the Chirp signal segments with different indexes or sequences in the target signal sent by different antenna ports is different. For example, the frequency modulation slope of the first Chirp signal in the target signal corresponding to the port A is different from the frequency modulation slope of the second Chirp signal in the target signal corresponding to the port B. Or, the frequency modulation slope of the second Chirp signal in the target signal corresponding to the port A is different from the frequency modulation slope of the first Chirp signal in the target signal corresponding to the port B.
In some embodiments, the Chirp rate of a Chirp signal may be designed to be associated with a port number or port index, or the termination frequency or start frequency of a Chirp signal may be associated with a port number or port index, or the bandwidth of a Chirp signal may be associated with a port number or port index. For example, the frequency modulation slope of the first Chirp signal and the frequency modulation slope of the second Chirp signal are located in different value ranges, so that the frequency modulation slope of the first Chirp signal and the frequency modulation slope of the second Chirp signal in the target signals sent by the same port are different, the frequency modulation slopes of the first Chirp signal and the second Chirp signal in the target signals sent by different ports are different, so that the frequency modulation slopes of the first Chirp signal of the target signals corresponding to different ports are different, and the frequency modulation slopes of the second Chirp signal of the target signals sent by different ports are different.
In the above embodiment, since the frequency modulation slope of the h-th-segment Chirp signal of the target signal transmitted by different antenna ports is different, or the frequency modulation slope of the h-th-segment Chirp signal of the target signal transmitted by one antenna port among a plurality of antenna ports is different from the frequency modulation slope of the j-th-segment Chirp signal of the target signal transmitted by other antenna ports, the first signals of different ports may have good cross-correlation properties.
Optionally, the absolute values of the frequency modulation slopes of the target signals sent by different antenna ports are uniformly distributed in the same value range, and the absolute values of the frequency modulation slopes of the target signals sent by different antenna terminals are different in size or polarity.
The value range may be configured by a protocol convention or a network side, or determined by the first device.
For example, the absolute value of the Chirp rate of a Chirp signal in a target signal between different ports isEvenly distributed in the interval.
The Chirp rate of the target signal between the different ports can be positive or negative, for example, when the Chirp rate is positive, the initial frequency of the first stage Chirp signal is fstart, the termination frequency of the second stage Chirp signal is fend, for example, when the Chirp rate is negative, the initial frequency of the first stage Chirp signal is fend, and the termination frequency of the second stage Chirp signal is fstart, which can be designed as follows:
The Chirp rate of the first segment of Chirp signal in the target signal corresponding to port N (n=0, 1., N-1) is:
the Chirp rate of the second stage Chirp signal is:
The absolute values of the frequency modulation slopes of the target signals transmitted by different antenna ports are uniformly distributed in the same value range, and the absolute values of the frequency modulation slopes of the target signals transmitted by different antenna terminals are different or have different polarities, so that the obtained target signals transmitted by different ports have good autocorrelation characteristics, and the target signals transmitted by different ports have good mutual correlation characteristics. Taking the total port number n=4 as an example, the autocorrelation characteristics of the target signals sent by different ports are shown in fig. 9, and the cross-correlation characteristics are shown in fig. 10.
Optionally, the absolute values of the frequency modulation slopes of the target signals sent by different antenna ports are uniformly distributed in different value ranges, and the absolute values of the frequency modulation slopes of the target signals sent by different antenna terminals are different in size or polarity.
The value range may be configured by a protocol convention or a network side, or determined by the first device.
The absolute values of the frequency modulation slopes of the target signals sent by the different antenna ports are uniformly distributed in different value ranges, wherein the frequency modulation slopes of the first-stage Chirp signals are always smaller than those of the second-stage Chirp signals, or the frequency modulation slopes of the first-stage Chirp signals are always larger than those of the second-stage Chirp signals.
The Chirp rate of the Chirp signal in the target signal sent by the different ports may be positive or negative, when the Chirp rate is positive, the initial frequency of the first stage Chirp signal is fstart, the final frequency of the second stage Chirp signal is fend, when the Chirp rate is negative, the initial frequency of the first stage Chirp signal is fend, and the final frequency of the second stage Chirp signal is fstart, which may be designed as follows:
The Chirp rate of the first segment of the Chirp signal in the target signal transmitted by port N (n=0, 1., N-1) is:
the Chirp rate of the second stage Chirp signal is:
Wherein, theMeaning that x is rounded down.
In addition to the frequency modulation slope, the end frequency of the first-segment Chirp signal/the start frequency of the second-segment Chirp signal, or the bandwidth of the first-segment Chirp signal/the second-segment Chirp signal may be used to represent the characteristics of the target signals sent by different ports, for example:
The termination frequency of the first segment Chirp signal or the start frequency of the second segment Chirp signal in the target signal transmitted by the port N (n=0, 1., N-1) is:
the bandwidth of the first Chirp signal in the target signal transmitted by port N (n=0, 1., N-1) is
The bandwidth of the second Chirp signal is
Or the absolute value of the frequency modulation slope of the first section of the Chirp signal of the target signal sent by each port is always smaller than or equal to the absolute value of the frequency modulation slope of the second section of the Chirp signal, namely, the absolute values of the first section and the second section of the Chirp signal belong to different numerical intervals, and meanwhile, the absolute values or the polarities of the frequency modulation slope of the first section and the frequency modulation slope of the second section of the Chirp signal of the target signal sent by different ports are also different in the respective numerical intervals, so that the cross-correlation property among different port signals is ensured.
Or the frequency modulation slope of the first-segment Chirp signal is always greater than or equal to the frequency modulation slope of the second-segment Chirp signal, for example:
the Chirp rate of the first Chirp signal in the target signal transmitted by port N (n=0, 1., N-1) isThe frequency modulation slope of the second-stage Chirp signal is
Wherein, theMeaning that x is rounded down.
Or if the Chirp signals in the target signals sent by different ports all adopt the same polar frequency modulation slope, the following design is adopted:
The frequency modulation slope of the Chirp signal in the target signals sent by different ports is positive, at this time, the initial frequency of the first stage Chirp signal is fstart, and the termination frequency of the second stage Chirp signal is fend, for example:
the Chirp rate of the first Chirp signal in the target signal transmitted by port N (n=0, 1., N-1) isThe frequency modulation slope of the second-stage Chirp signal is
Or the Chirp frequency modulation slope of the target signals sent by different ports is negative, at this time, the initial frequency of the first stage Chirp signal is fend, and the termination frequency of the second stage Chirp signal is fstart, for example:
the Chirp rate of the first Chirp signal in the target signal transmitted by port N (n=0, 1., N-1) isThe frequency modulation slope of the second-stage Chirp signal is
If Chirp signals in target signals sent by different ports can adopt different polarity frequency modulation slopes, that is, the Chirp signal frequency modulation slope in the target signals sent by different ports can be positive or negative, when the frequency modulation slope is positive, the initial frequency of the first section Chirp signal is fstart, the termination frequency of the second section Chirp signal is fend, and when the frequency modulation slope is negative, the initial frequency of the first section Chirp signal is fend, and the termination frequency of the second section Chirp signal is fstart, the following design can be adopted:
The Chirp rate of the first segment of the Chirp signal in the target signal transmitted by port N (n=0, 1., N-1) is:
the Chirp rate of the second stage Chirp signal is:
Wherein, theMeaning that x is rounded down.
In some embodiments, the Chirp rate of the first segment of the Chirp signal is always less than the Chirp rate of the second segment of the Chirp signal, i.e., the absolute value of the Chirp rate of the first segment of the Chirp signal is atUniformly distributed among the second stage Chirp signal, the absolute value of the frequency modulation slope of the second stage Chirp signal is equal toUniformly distributed, or the frequency modulation slope of the first Chirp signal is always greater than or equal to that of the second Chirp signal, i.e. the absolute value of the frequency modulation slope of the first Chirp signal isUniformly distributed among the second stage Chirp signal, the absolute value of the frequency modulation slope of the second stage Chirp signal is equal toThe frequency modulation slope of the first Chirp signal and the frequency modulation slope of the second Chirp signal are exchanged in the slope generation formula.
The absolute values of the frequency modulation slopes of the target signals transmitted by different antenna ports are uniformly distributed in different value ranges respectively, and the absolute values of the frequency modulation slopes of the target signals transmitted by different antenna terminals are different or have different polarities, so that the obtained target signals transmitted by different ports have good autocorrelation characteristics, and the target signals transmitted by different ports have good mutual correlation characteristics. Taking the total port number n=4 as an example, the autocorrelation characteristics of the target signals sent by different ports are shown in fig. 11 or 12, and the cross-correlation characteristics are shown in fig. 13 or 14.
In contrast, fig. 15 shows the autocorrelation and cross-correlation results of a randomly generated reference signal of a gold sequence modulated by Quadrature phase shift keying (Quadrature PHASE SHIFT KEYING, QPSK), and by comparing fig. 8 to fig. 15, it can be known that the target signals have good autocorrelation characteristics and cross-correlation characteristics, and meanwhile, compared with the design of the reference signal based on the gold sequence, the target signal has a lower peak-to-average ratio, can perform receiving detection by adopting a time domain mixing mode, has a simpler processing mode, and is beneficial to performing self-interference elimination in an radio frequency domain.
In some embodiments, when the target signal is sent by adopting the signals of the multiple antenna ports, the receiving and sending sides can calculate the Chirp signal frequency modulation slope characteristics of the target signals sent by the different antenna ports according to a formula so as to determine the target signals sent by the different antenna ports, or can directly obtain the mapping relation between the frequency modulation slope, the termination frequency, the starting frequency or the bandwidth of the different ports and the Chirp signals so as to determine the target signals sent by the different antenna ports.
As an alternative embodiment, the target signal is time-division multiplexed with other signals, which are different signals from the target signal in the OFDM system.
In this embodiment, the target signal may be time-division multiplexed with other signals, which may make the target signal more compatible with the OFDM system.
As an alternative embodiment, a second parameter of the target signal is associated with the perceived need information, the second parameter comprising at least one of:
A transmission period, a time interval, a bandwidth, a duration, the number of the target signals, and a total duration of the target signals transmitted by the first device.
The number of the target signals may be the total number of the target signals transmitted by the first device, or the number of the target signals transmitted by the same antenna port.
In some embodiments, the target signal supports at least one of periodic transmission, semi-persistent transmission, non-periodic transmission, and when the target signal is used for sensing, a transmission period of the target signal, a time interval Δt between two adjacent first signals in the non-periodic transmission, i.e., a time interval Δt between two adjacent first signals in the time domain, a bandwidth, a duration, a total duration of X, X target signals, and the like are associated with the sensing requirement.
The sensing requirement information may be that the network side device sends the first device or the second device.
The association of the second parameter of the target signal with the sensing requirement information may be understood that the second parameter of the target signal is determined based on the sensing requirement information, so that the second parameter of the target signal may be matched with the sensing requirement information, and further the target signal may meet the sensing requirement, so as to improve the sensing performance.
The above-mentioned perceived need information may include at least one of:
Sensing traffic or sensing traffic types, sensing traffic may include at least one of detecting the presence of a target, positioning, speed detection, distance detection, angle detection, acceleration detection, material analysis, component analysis, shape detection, class classification, RCS detection, polarized scattering characteristics detection, fall detection, intrusion detection, quantity statistics, indoor positioning, gesture recognition, lip recognition, gait recognition, expression recognition, facial recognition, respiration monitoring, heart rate monitoring, pulse monitoring, humidity/brightness/temperature/barometric pressure monitoring, air quality monitoring, weather condition monitoring, environmental reconstruction, topography, building/vegetation distribution detection, people flow or traffic flow detection, crowd density, vehicle density detection, and the like; the sensing service types may be classified according to a certain characteristic, for example, the sensing service types may be classified according to functions into detection type sensing service (including intrusion detection, fall detection, for example), parameter estimation type sensing service (distance, angle, speed calculation), identification type sensing service (action identification, identity identification) and the like, or classified according to, for example, object detection and tracking type sensing service (including object presence, object ranging/angle measurement/positioning/track tracking), environment monitoring type sensing service (including rainfall detection, flood monitoring, action detection type sensing service (including gesture/action identification, respiration/heartbeat detection, fall detection) and the like, and may be classified according to sensing range (short-range sensing, medium-range sensing, long-range sensing), division by perceived fineness (coarse granularity perception, fine dynamics perception, etc.), division by perceived scene (indoor, outdoor, home, factory, road, etc.), division by power consumption/energy consumption, division by resource occupation, etc.
The perception target area may refer to a position area where a perception object may exist or a position area where imaging or environment reconstruction is required;
The perceived object types can be classification of perceived objects according to possible motion characteristics of the perceived objects, and each perceived object type contains information such as the motion speed, the motion acceleration, the typical RCS and the like of typical perceived objects;
the perceived QoS may be a performance index that perceives a perceived target area or perceived object, including at least one of:
the sensing resolution can be divided into ranging resolution, angular resolution, speed measurement resolution, imaging resolution and the like;
The sensing precision can be divided into ranging precision, angle measuring precision, speed measuring precision, positioning precision and the like;
the sensing range can be divided into a ranging range, a speed measuring range, a angle measuring range, an imaging range and the like;
sensing time delay, such as a time interval from sending a sensing signal to obtaining a sensing result, or a time interval from initiating a sensing requirement to obtaining the sensing result;
Sensing update rate, such as time interval between two adjacent sensing execution and sensing result obtaining;
detection probabilities, such as the probability of being correctly detected in the presence of a perceived object;
false alarm probability, such as probability of false detection of a perceived target in the absence of a perceived object;
The maximum number of targets that can be perceived.
In some embodiments, at least one of the above transmission period, time interval, bandwidth, duration, number of the target signals, and total duration of the target signals transmitted by the first device may also be a protocol contract or a network configuration.
As an alternative embodiment, in a case where the first device transmits a plurality of the target signals, a time interval between adjacent ones of the plurality of target signals satisfies a maximum non-ambiguous velocity measurement range requirement or a maximum non-ambiguous doppler measurement range requirement;
Or alternatively, the first and second heat exchangers may be,
The total duration of the target signal sent by the first device meets the Doppler resolution requirement or the speed resolution requirement;
Or alternatively, the first and second heat exchangers may be,
The bandwidth of the target signal meets the delay resolution requirement or the distance resolution requirement.
The above-described time interval for periodically transmitting the target signal can also be understood as a transmission period of the target signal in the time domain.
The above-mentioned time interval between adjacent target signals satisfies the maximum non-ambiguous speed measurement range requirement or the maximum non-ambiguous doppler measurement range requirement may be that when the target signals are used for sensing measurement, a plurality of target signals are required to perform joint measurement, and a transmission period of the target signals in the time domain or a time interval Δt between two adjacent Chirp signals in the time domain satisfies the maximum non-ambiguous speed measurement range requirement or the maximum non-ambiguous doppler measurement range requirement, for example:
If the speed direction is considered, the time domain resource interval is not more than 1/(2|fdmax |) or not more than c/(4 fc|vmax |), and if the speed direction is not considered, the time domain resource interval is not more than 1/fdmax or not more than c/(2 fcvmax), wherein fdmax is the maximum non-fuzzy Doppler, vmax is the maximum non-fuzzy speed, fc is the carrier frequency, and c is the light speed.
In an alternative embodiment, the sensing performance may be improved because the time interval between the two target signals meets the maximum non-ambiguous velocity measurement range requirement or the maximum non-ambiguous doppler measurement range requirement.
The total duration of the target signal sent by the first device meeting the doppler resolution requirement or the velocity resolution requirement may refer to the total duration doppler resolution requirement or the velocity resolution requirement of the plurality of target signals sent by the first device. Wherein, for single-base radar perception may be:
T is greater than or equal to 1/Δfd or T is greater than or equal to c/(2 fc Δv), wherein T represents the total duration, Δfd is Doppler resolution, and Δv is velocity resolution;
in an alternative embodiment, the sensing performance may be improved because the total duration of the target signal sent by the first device meets the doppler resolution requirement or the velocity resolution requirement.
The bandwidth of the target signal meets the time delay resolution requirement or the distance resolution requirement, and the perception of the single-base radar can be as follows:
B is greater than or equal to 1/Deltaτ or B is greater than or equal to c/(2DeltaR), wherein Deltaτ is the delay resolution and DeltaR is the distance resolution.
In an alternative embodiment, the bandwidth of the target signal meets the delay resolution requirement or the distance resolution requirement, so that the perceptual performance can be improved.
As an alternative embodiment, the method further comprises:
the first device receives or transmits indication information, wherein the indication information is used for indicating at least one of the following:
Configuration information, measurement configuration information and measurement auxiliary information of the target signal.
The first device receives the indication information, which may be sent by the second device or other devices.
The first device may send the indication information to the second device.
The configuration information of the target signal may be information for configuring at least one piece of Chirp signal in the target signal, or may be information for configuring a resource of the target signal or information associated with the target signal.
In some embodiments, the configuration information of the target signal includes at least one of:
The number of Chirp signal segments contained by the target signal;
Frequency modulation slope information of at least one section of Chirp signal in the target signal;
frequency domain resource information of at least one section of Chirp signal in the target signal;
Time domain resource information of at least one section of Chirp signal in the target signal;
Antenna port information of the target signal;
at least one item of target information, wherein the target information is information related to a first parameter of at least one section of Chirp signals in the M sections of Chirp signals.
Please refer to the corresponding descriptions of the above embodiments for the target information and the first parameter of at least one piece of Chirp signal, which are not described herein.
The number of Chirp signal segments included in the target signal is the value of M, such as m=2 or other values.
The at least one Chirp signal may be all or part of the Chirp signal segments included in the target signal. For example, the Chirp rate information of at least one of the target signals may include the Chirp rate information of at least one of the target signals, or a list of the Chirp rates of all of the target signals.
The frequency modulation slope information includes the absolute value of the frequency modulation slope or the polarity (positive or negative) of the frequency modulation slope, or the frequency modulation slope average value of all Chirp signals, and is specifically as follows:
wherein B is the overall bandwidth of the target signal, namely the length of the frequency domain resource of the target signal, and T is the duration of the target signal, namely the length of the time domain resource of the target signal;
Or the sum of the frequency modulation slopes of all the Chirp signals, specifically as follows:
Alternatively, the Chirp rate information of the at least one Chirp signal may be a value directly indicating a slope, or may be a relationship indicating a sum of the Chirp rate average value of all the Chirp signals or the Chirp rate of all the Chirp signals, for example, 1/5 of the Chirp rate of the first Chirp signal is ksum and the Chirp rate of the second Chirp signal is 4/5 of ksum, or may be a relationship between the Chirp rate of the first Chirp signal and the Chirp rate of the second Chirp signal, for example, k0/k1 =1/4.
Because the frequency modulation slope information of at least one section of Chirp signal in the target signal is configured, the second equipment can determine the frequency modulation slope of the Chirp signal based on the information, so that the target signal can be measured better, and the measurement performance is improved.
The frequency domain resource information of at least one section of Chirp signal in the target signal may include resource information occupied by at least one section of Chirp signal in the target signal, and may also include frequency-related parameters of at least one section of Chirp signal.
In some embodiments, the frequency domain resource information includes at least one of:
the method comprises the steps of starting frequency of at least one section of Chirp signal in the target signal, ending frequency of at least one section of Chirp signal in the target signal and bandwidth information of at least one section of Chirp signal in the target signal.
Wherein, the information of the start frequency or the end frequency of the at least one piece of Chirp signal may be f01 shown in fig. 4;
The bandwidth information of at least one of the Chirp signals may be an actual size indicating the bandwidth of the Chirp signal, or may be a relation indicating the bandwidth of the Chirp signal to the entire bandwidth of the first signal, for example, the bandwidth of the first Chirp signal occupies 1/5 of the entire bandwidth, and the bandwidth of the second Chirp signal occupies 4/5 of the entire bandwidth, or may be a relation between the frequency modulation slope of the first Chirp signal and the bandwidth of the second Chirp signal, for example, B0/B1 =1/4.
Because the indication information comprises the frequency domain resource information, the second equipment can more accurately and reliably measure the target signal based on the time domain resource information, and therefore measurement performance is improved.
The time domain resource information of at least one piece of Chirp signal in the target signal may indicate that each piece of Chirp duration is equal to the OFDM symbol duration, or may be equal to a plurality of OFDM symbol durations.
Because the indication information comprises the time domain resource information, the second equipment can more accurately and reliably measure the target signal based on the time domain resource information, and therefore measurement performance is improved.
The antenna port information may include at least one of:
Mapping relation between at least one antenna port and frequency modulation slope;
Mapping relation between at least one antenna port and termination frequency;
mapping relation between at least one antenna port and initial frequency;
mapping relation between at least one antenna port and bandwidth;
a frequency modulation slope calculation mode corresponding to at least one antenna port;
a calculation mode of a termination frequency corresponding to at least one antenna port;
a calculation mode of an initial frequency corresponding to at least one antenna port;
a calculation mode of the bandwidth corresponding to at least one antenna port;
Total antenna port number;
antenna port index information.
The antenna port index information may be a port index list;
since the indication information includes the antenna port information, the second device can more accurately and reliably determine at least one of a frequency modulation slope, a termination frequency, a start frequency or a bandwidth of the target signal transmitted by the antenna port based on the antenna port information, so that measurement of the target signal based on the determined parameters can improve measurement performance.
The configuration information of the target signal may include at least one of the following in addition to the at least one of the above items:
A signal resource Identification (ID) for distinguishing between different signal resource configurations;
signal usage means that the signal is a signal for communication (e.g. channel measurement, channel estimation, synchronization, carrying data information, etc.), a signal for perception, or a signal for both communication and perception. Specifically, it may be a signal for which kind of perceived service or a signal for which kind of perceived service.
Waveforms such as orthogonal frequency division multiplexing (Orthogonal frequency division multiplex, OFDM), single carrier frequency division multiple access (Single-carrier Frequency-Division Multiple Access, SC-FDMA), orthogonal time frequency space (Orthogonal Time Frequency Space, OTFS), chirp, frequency modulated continuous wave (Frequency Modulated Continuous Wave, FMCW), pulse signals, etc.;
the subcarrier spacing is, for example, 30KHz.
The guard interval is the time interval from the end of sending the signal to the time when the latest echo signal of the signal is received, the parameter is proportional to the maximum perceived distance, for example, the guard interval can be calculated by c/(2Rmax), Rmax is the maximum perceived distance (belonging to the perceived need information), for example, for the perceived signal received spontaneously and automatically, Rmax represents the maximum distance from the point of sending and receiving the perceived signal to the point of sending the signal, in some cases, the Cyclic Prefix (CP) of the OFDM signal can play the role of the minimum guard interval, and c is the speed of light.
The starting frequency domain position, namely the starting frequency point, can also be the starting RE and RB index;
The starting time domain position, namely the starting time point, can also be a starting symbol index, a time slot index and a frame index;
the position of the termination frequency domain, namely the termination frequency point, can be represented by termination RE and RB indexes;
The termination time domain position, namely the termination time point, can be expressed by a termination RE and RB index;
The frequency domain resource length, namely the frequency domain bandwidth, wherein the frequency domain bandwidth is inversely proportional to the distance resolution, and the frequency domain bandwidth B of each first signal is more than or equal to c/(2DeltaR), wherein c is the speed of light, and DeltaR is the distance resolution;
the time domain resource length, also known as burst (burst) duration, is inversely proportional to the doppler resolution.
The frequency domain resource interval represents the frequency domain resource unit interval of the adjacent signals, and may be represented by the number of REs or the number of RBs, or may be represented by a Density value, for example, density=1, where one RE is used for carrying signals in each RB. The frequency domain resource interval is inversely proportional to the maximum non-fuzzy distance/time delay, wherein when the subcarrier is continuously mapped for the OFDM system, the frequency domain interval is equal to the subcarrier interval;
The time domain resource interval is a time interval between two adjacent signal resource units, and is associated with the maximum non-fuzzy Doppler frequency shift or the maximum non-fuzzy speed, or can be a signal time domain transmission period.
Time domain resource characteristics, periodic transmission, semi-persistent transmission, and aperiodic transmission.
The signal power takes a value every 2dBm, for example from-20 dBm to 23 dBm.
Sequence information including sequence type information (ZC sequence, PN sequence, etc.), sequence generation mode, sequence length, etc.
Signal direction, angle information of signal transmission or beam information.
QCL relation, e.g. the sense signal comprises a plurality of resources, each resource and one synchronization signal block (Synchronization Signal Block, SSB) QCL, QCL comprising Type a, B, C or D.
CP information, which may include a CP type or CP length, etc., wherein the CP type may include a normal cyclic prefix (Normal Cyclic Prefix, NCP), an extended cyclic prefix (Extended Cyclic Prefix, ECP), or a newly designed perception measurement dedicated CP, etc.
The measurement configuration information includes at least one of the following:
The measured signal resource indication, e.g. a signal resource Identification (ID).
The number of signal resources measured;
Sensing the measurement quantity;
Reporting configuration, namely reporting criteria of the measurement result of the second device, at least comprises at least one of reporting time-frequency domain resource configuration, reporting period and reporting triggering event. Wherein the triggering event includes at least one of:
an event of entering a specific area (e.g., cell);
An event arriving at a specific time;
An event that a certain type of measurement signal reaches a certain threshold;
an event that the device moves beyond some predefined (straight) distance from a previous location;
An event that the device orientation changes by more than some predefined angle, which may refer to the orientation of a device on the device, such as the orientation of an antenna, sensor, etc.;
Events in which the speed of movement of the device exceeds some predefined speed threshold;
The device sensor measures events where the resulting environmental information changes (e.g., temperature/humidity/illumination intensity) over a range.
The second equipment can better measure the target signal through the measurement configuration information so as to improve measurement performance.
The measurement assistance information may include at least one of:
beam indication of transmit beams including at least one of total transmit beam number, perceived beam number, communication beam number
A receive beam indication comprising a suggested receive beam direction or a corresponding index;
position information of the first device, or orientation information of the first device relative to the second device;
Sensing demand information.
The second equipment can better measure the target signal by the aid of the measurement auxiliary information so as to improve measurement performance.
It should be noted that at least one item of the above indication information configuration may also be a protocol assignment or a network side configuration.
The embodiment of the application can comprise the following cases:
In case one, dual base sensing, a first device sends a target signal, a second device receives the target signal and is used for sensing measurements or communications (when the target signal is also used for communication channel measurements or demodulation);
In case two, the single base perception, the first device transmits the target signal while receiving its echo signal and for perception, further comprises the second device receiving the target signal and for communication (when the target signal is also used for communication channel measurement or demodulation).
Wherein the first device and the second device may be radio access network devices or terminals. The first device may acquire the sensing requirement information from the third device, the first device and the second device may send the sensing measurement result to the third device, and the third device may be a core network sensing network function or a sensing network element.
Wherein signaling between the radio Access network device and the terminal, different terminals is through radio resource control (Radio Resource Control, RRC) signaling or media Access control unit (Medium Access Control Control Element, MAC CE) or layer 1 signaling or other newly defined sensing signaling, signaling between the sensing network function and the terminal is through Non-Access-Stratum (NAS) signaling (forwarding through AMF) or through RRC signaling or MAC CE or layer 1 signaling or other newly defined sensing signaling, interaction between the sensing network function and the base station is through AMF to forward to the radio Access network through N2 interface, or core network sensing network function is sent to the radio Access network through N3 interface, or UPF is sent to the radio Access network through newly defined interface, signaling between the radio Access network devices is through Xn interface.
In the embodiment of the application, a first device sends a target signal, wherein the target signal is used for measurement, the target signal comprises M segments of Chirp signals, M is a positive integer greater than 1, and for two adjacent segments of Chirp signals in the M segments of Chirp signals, the initial frequency of the latter segment of Chirp signals is the termination frequency of the former segment of Chirp signals, and the frequency modulation slopes of the two adjacent segments of Chirp signals are different. Therefore, the measurement based on the M-segment Chirp signals can be realized, and the Chirp signals have the characteristic of low peak-to-average ratio, so that the peak-to-average ratio during measurement can be reduced by sending the target signals for measurement, and the measurement performance of the equipment is improved. In addition, because two adjacent segments of Chirp signals in the M segments of Chirp signals, the initial frequency of the next segment of Chirp signal is the final frequency of the previous segment of Chirp signal, and the frequency modulation slopes of the two adjacent segments of Chirp signals are different, the flexibility of target signal design can be improved, the interference among different target signals can be reduced, and the measurement performance can be further improved.
Referring to fig. 16, fig. 16 is a flowchart of a signal measurement method according to an embodiment of the application, as shown in fig. 16, including the following steps:
1601, the second device measures the target signal to obtain a measurement result;
The target signal comprises M sections of chirped Chirp signals, wherein M is a positive integer greater than 1;
For two adjacent segments of the M segments of the Chirp signals, the starting frequency of the next segment of the Chirp signal is the ending frequency of the previous segment of the Chirp signal, and the frequency modulation slopes of the two adjacent segments of the Chirp signals are different.
Optionally, the M-segment Chirp signal has at least one of the following characteristics:
the sum of bandwidths of the M segments of Chirp signals is equal to the bandwidth of the target signal;
The polarity of the frequency modulation slope of the M-segment Chirp signals is the same;
the sum of the frequency modulation slopes of the M-segment Chirp signals satisfiesTi is the frequency modulation slope of the ith Chirp signal, B is the bandwidth of the target signal, Ti is the duration of the ith Chirp signal, and TChirp is the average value of the duration of the M Chirp signals;
the sum of the duration of the M segments of Chirp signals is equal to the duration of the target signal;
The duration of the M-segment Chirp signals is the same;
the duration of each of the M segments of Chirp signals is the same as the duration of an orthogonal frequency division multiplexing OFDM symbol, and the OFDM symbol contains a cyclic prefix CP or does not contain a CP.
Optionally, the first parameter of at least one of the M-segment Chirp signals is associated with target information, where the target information includes at least one of the following:
Perceptual information, time domain resource information, frequency domain resource information, antenna port index, number of antenna ports, code division multiplexing CDM group index, number of CDM groups, antenna index, number of antennas, codeword index.
Optionally, the first parameter of the at least one piece of Chirp signal includes at least one of:
frequency modulation slope, start frequency point, end frequency point, bandwidth.
Optionally, the perception information includes at least one of:
The sensing area identification, the identification for indicating whether to be used for sensing, the sensing service identification, the sensing service type identification, the sensing target identification, the tag identification associated with the sensing target, the number of the sensing targets and the equipment information participating in sensing measurement.
Optionally, the second device measures the target signal to obtain a measurement result, including:
And the second equipment measures the target signals sent by the first equipment through the plurality of antenna ports to obtain a measurement result, wherein the frequency modulation slopes of the target signals sent by different antenna ports are different.
Optionally, the different frequency modulation slopes of the target signals sent by the different antenna ports include at least one of:
the frequency modulation slopes of the h-th-stage Chirp signals of the target signals transmitted by different antenna ports are different;
The frequency modulation slope of the h-th-segment Chirp signal of the target signal sent by one antenna port of the plurality of antenna ports is different from the frequency modulation slope of the j-th-segment Chirp signal of the target signal sent by other antenna ports;
Wherein h is a positive integer less than or equal to M, j is a positive integer less than or equal to M, and j is not equal to h.
Optionally, the absolute values of the frequency modulation slopes of the target signals transmitted by different antenna ports are uniformly distributed within the same value range, and the absolute values of the frequency modulation slopes of the target signals transmitted by different antenna terminals are different or have different polarities, or
The absolute values of the frequency modulation slopes of the target signals sent by different antenna ports are uniformly distributed in different value ranges respectively, and the absolute values of the frequency modulation slopes of the target signals sent by different antenna terminals are different in size or polarity.
Optionally, the target signal is time-division multiplexed with other signals, where the other signals are different signals from the target signal in the OFDM system.
Optionally, a second parameter of the target signal is associated with the perceived need information, and the second parameter includes at least one of:
A transmission period, a time interval, a bandwidth, a duration, the number of the target signals, and a total duration of the target signals transmitted by the first device.
Optionally, in the case that the first device transmits a plurality of the target signals, a time interval between adjacent target signals among the plurality of target signals satisfies a maximum non-ambiguous speed measurement range requirement or a maximum non-ambiguous doppler measurement range requirement;
Or alternatively, the first and second heat exchangers may be,
The total duration of the target signal sent by the first device meets the Doppler resolution requirement or the speed resolution requirement;
Or alternatively, the first and second heat exchangers may be,
The bandwidth of the target signal meets the delay resolution requirement or the distance resolution requirement.
Optionally, the method further comprises:
The second device sends or receives indication information, wherein the indication information is used for indicating at least one of the following:
Configuration information, measurement configuration information and measurement auxiliary information of the target signal.
Optionally, the configuration information of the target signal includes at least one of:
The number of Chirp signal segments contained by the target signal;
Frequency modulation slope information of at least one section of Chirp signal in the target signal;
frequency domain resource information of at least one section of Chirp signal in the target signal;
Time domain resource information of at least one section of Chirp signal in the target signal;
Antenna port information of the target signal;
at least one item of target information, wherein the target information is information related to a first parameter of at least one section of Chirp signals in the M sections of Chirp signals.
Optionally, the frequency domain resource information includes at least one of:
the method comprises the steps of starting frequency of at least one section of Chirp signal in the target signal, ending frequency of at least one section of Chirp signal in the target signal and bandwidth information of at least one section of Chirp signal in the target signal.
Optionally, the antenna port information includes at least one of:
Mapping relation between at least one antenna port and frequency modulation slope;
Mapping relation between at least one antenna port and termination frequency;
mapping relation between at least one antenna port and initial frequency;
mapping relation between at least one antenna port and bandwidth;
a frequency modulation slope calculation mode corresponding to at least one antenna port;
a calculation mode of a termination frequency corresponding to at least one antenna port;
a calculation mode of an initial frequency corresponding to at least one antenna port;
a calculation mode of the bandwidth corresponding to at least one antenna port;
Total antenna port number;
antenna port index information.
It should be noted that, as an implementation manner of the second device corresponding to the embodiment shown in fig. 3, a specific implementation manner of the second device may refer to a description related to the embodiment shown in fig. 3, so that in order to avoid repetitive description, the description of this embodiment is omitted.
The method provided by the embodiments of the present application is illustrated by the following examples:
Embodiment one:
In this embodiment, taking the example that the base station transmits, and the terminal receives the target signal to perform sensing, a specific signal transceiving and interaction flow is described, as shown in fig. 17, including the following steps:
Step 1, the sensing network function sends sensing requirement information (optionally) to the base station.
Step 2, the base station sends indication information to the terminal, wherein the indication information comprises at least one of the following:
configuration information of the target signal, measurement configuration information, measurement auxiliary information.
At least one of the indication information may be sent to the terminal (and the base station) by the network-aware function, and at least two of the first indication information may be sent by the same signaling or sent by different signaling, and the sending order is not limited.
And 3, the base station transmits a target signal.
And 4, the terminal receives the target signal and performs sensing measurement (or communication measurement) to obtain a sensing measurement result.
And step 5, the terminal sends the sensing measurement result to a sensing network function.
And 6, the sensing network function calculates a sensing result according to the sensing measurement result. Alternatively, the terminal may send the sensing measurement result to the base station, and the base station calculates the sensing result according to the sensing measurement result and sends the sensing result to the sensing network function.
If the target signal is a signal for channel measurement or beam management, feedback communication related measurement results are also required, including but not limited to at least one of PMI, RI, CQI, RSRP, RSRQ, RSSI, SNR, SINR, BER, BLER, beam indication (e.g., beam index).
The sensing result is further calculated according to the sensing measurement result, the sensing measurement result and the sensing result are values of sensing measurement quantity, for example, the sensing measurement result is delay and angle information corresponding to the sensing target, and the sensing result is position or track information of the sensing target.
It should be noted that, for the scenario that the device a sends the device B to receive the sensing and communication, the terminal may send the target signal according to the indication information after receiving the indication information, and the base station receives the signal and measures to obtain the sensing measurement result and sends the sensing measurement result to the sensing network function, or the base station sends and receives the target signal, or the terminal sends and receives the target signal, which is not limited in this embodiment.
Embodiment two:
in this embodiment, taking the sensing of the base station transmitting the target signal and receiving the target signal echo as an example, a specific signal transceiving and interaction flow is described, as shown in fig. 18, and the method includes the following steps:
Step 1, the sensing network function sends sensing requirement information (optionally) to the base station.
Step 2, the base station sends indication information to the terminal, wherein the indication information comprises at least one of the following:
Configuration information of a target signal, measurement configuration information (when the target signal is a reference signal for channel estimation and demodulation by a terminal or the target signal is not used for communication, the measurement configuration information does not need to be transmitted), measurement auxiliary information.
And step3, the base station transmits the target signal.
Step 4, receiving a target signal and measuring, wherein the step comprises the following steps:
And the base station performs measurement based on the received target signal echo to obtain a perception measurement result.
Or the terminal receives the target signal and performs measurement to obtain a communication measurement result, or the terminal receives the target signal and uses the target signal for channel estimation and demodulation.
Step 5, measuring result feedback, the step includes:
And the base station sends the sensing measurement result to a sensing network function.
Or the terminal sends the communication measurement result to the base station. (feedback of measurement results is not required when the target signal is a reference signal for channel estimation and demodulation by the terminal or the target signal is not used for communication)
And 6, the sensing network function calculates a sensing result according to the sensing measurement result. Alternatively, the base station may calculate the sensing result according to the sensing measurement result and send the sensing result to the sensing network function.
It should be noted that, for the self-receiving sensing and communication scenario, after the terminal receives the indication information, the terminal may send the target signal according to the indication information, the terminal receives the target signal echo to measure, and obtains the sensing measurement result to send to the sensing network function, and the base station receives the target signal to measure to obtain the communication measurement result, or the base station receives the target signal to use for channel estimation and demodulation.
According to the signal sending method provided by the embodiment of the application, the execution main body can be a signal sending device. In the embodiment of the present application, a signal transmission method performed by a signal transmission device is taken as an example, and the signal transmission device provided in the embodiment of the present application is described.
According to the signal measuring method provided by the embodiment of the application, the execution main body can be a signal measuring device. In the embodiment of the application, a signal measuring device is taken as an example to execute a signal measuring method.
Referring to fig. 19, fig. 19 is a block diagram of a signal transmission apparatus according to an embodiment of the present application, and as shown in fig. 19, a signal transmission apparatus 1900 includes:
A transmitting module 1901 for transmitting a target signal, the target signal being used for measurement;
The target signal comprises M sections of chirped Chirp signals, wherein M is a positive integer greater than 1;
For two adjacent segments of the M segments of the Chirp signals, the starting frequency of the next segment of the Chirp signal is the ending frequency of the previous segment of the Chirp signal, and the frequency modulation slopes of the two adjacent segments of the Chirp signals are different.
Optionally, the M-segment Chirp signal has at least one of the following characteristics:
the sum of bandwidths of the M segments of Chirp signals is equal to the bandwidth of the target signal;
The polarity of the frequency modulation slope of the M-segment Chirp signals is the same;
the sum of the frequency modulation slopes of the M-segment Chirp signals satisfiesTi is the frequency modulation slope of the ith Chirp signal, B is the bandwidth of the target signal, Ti is the duration of the ith Chirp signal, and TChirp is the average value of the duration of the M Chirp signals;
the sum of the duration of the M segments of Chirp signals is equal to the duration of the target signal;
The duration of the M-segment Chirp signals is the same;
the duration of each of the M segments of Chirp signals is the same as the duration of an orthogonal frequency division multiplexing OFDM symbol, and the OFDM symbol contains a cyclic prefix CP or does not contain a CP.
Optionally, the first parameter of at least one of the M-segment Chirp signals is associated with target information, where the target information includes at least one of the following:
Perceptual information, time domain resource information, frequency domain resource information, antenna port index, number of antenna ports, code division multiplexing CDM group index, number of CDM groups, antenna index, number of antennas, codeword index.
Optionally, the first parameter of the at least one piece of Chirp signal includes at least one of:
frequency modulation slope, start frequency point, end frequency point, bandwidth.
Optionally, the perception information includes at least one of:
The sensing area identification, the identification for indicating whether to be used for sensing, the sensing service identification, the sensing service type identification, the sensing target identification, the tag identification associated with the sensing target, the number of the sensing targets and the equipment information participating in sensing measurement.
Optionally, the sending module 1901 is configured to send the target signal through multiple antenna ports, where the frequency modulation slope of the target signal sent by different antenna ports is different.
Optionally, the different frequency modulation slopes of the target signals sent by the different antenna ports include at least one of:
the frequency modulation slopes of the h-th-stage Chirp signals of the target signals transmitted by different antenna ports are different;
The frequency modulation slope of the h-th-segment Chirp signal of the target signal sent by one antenna port of the plurality of antenna ports is different from the frequency modulation slope of the j-th-segment Chirp signal of the target signal sent by other antenna ports;
Wherein h is a positive integer less than or equal to M, j is a positive integer less than or equal to M, and j is not equal to h.
Optionally, the absolute values of the frequency modulation slopes of the target signals transmitted by different antenna ports are uniformly distributed within the same value range, and the absolute values of the frequency modulation slopes of the target signals transmitted by different antenna terminals are different or have different polarities, or
The absolute values of the frequency modulation slopes of the target signals sent by different antenna ports are uniformly distributed in different value ranges respectively, and the absolute values of the frequency modulation slopes of the target signals sent by different antenna terminals are different in size or polarity.
Optionally, the time domain or frequency domain resources occupied by the target signals sent by different antenna ports in the plurality of antenna ports are the same.
Optionally, the target signal is time-division multiplexed with other signals, where the other signals are different signals from the target signal in the OFDM system.
Optionally, a second parameter of the target signal is associated with the perceived need information, and the second parameter includes at least one of:
A transmission period, a time interval, a bandwidth, a duration, the number of the target signals, and a total duration of the target signals transmitted by the first device.
Optionally, in the case that the first device transmits a plurality of the target signals, a time interval between adjacent target signals among the plurality of target signals satisfies a maximum non-ambiguous speed measurement range requirement or a maximum non-ambiguous doppler measurement range requirement;
Or alternatively, the first and second heat exchangers may be,
The total duration of the target signal sent by the first device meets the Doppler resolution requirement or the speed resolution requirement;
Or alternatively, the first and second heat exchangers may be,
The bandwidth of the target signal meets the delay resolution requirement or the distance resolution requirement.
Optionally, the apparatus further includes:
the transmission module is used for receiving or sending indication information, and the indication information is used for indicating at least one of the following:
Configuration information, measurement configuration information and measurement auxiliary information of the target signal.
Optionally, the configuration information of the target signal includes at least one of:
The number of Chirp signal segments contained by the target signal;
Frequency modulation slope information of at least one section of Chirp signal in the target signal;
frequency domain resource information of at least one section of Chirp signal in the target signal;
Time domain resource information of at least one section of Chirp signal in the target signal;
Antenna port information of the target signal;
at least one item of target information, wherein the target information is information related to a first parameter of at least one section of Chirp signals in the M sections of Chirp signals.
Optionally, the frequency domain resource information includes at least one of:
the method comprises the steps of starting frequency of at least one section of Chirp signal in the target signal, ending frequency of at least one section of Chirp signal in the target signal and bandwidth information of at least one section of Chirp signal in the target signal.
Optionally, the antenna port information includes at least one of:
Mapping relation between at least one antenna port and frequency modulation slope;
Mapping relation between at least one antenna port and termination frequency;
mapping relation between at least one antenna port and initial frequency;
mapping relation between at least one antenna port and bandwidth;
a frequency modulation slope calculation mode corresponding to at least one antenna port;
a calculation mode of a termination frequency corresponding to at least one antenna port;
a calculation mode of an initial frequency corresponding to at least one antenna port;
a calculation mode of the bandwidth corresponding to at least one antenna port;
Total antenna port number;
antenna port index information.
The signal transmitting device can improve the measurement performance of the equipment.
The signal sending device in the embodiment of the application can be an electronic device, for example, an electronic device with an operating system, or can be a component in the electronic device, for example, an integrated circuit or a chip. For example, the electronic device may be a terminal, or may be other devices besides a terminal. By way of example, the terminals may include, but are not limited to, the types of terminals listed in the embodiments of the present application, and the other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and the embodiments of the present application are not limited in detail.
The signal transmitting device provided by the embodiment of the present application can implement each process implemented by the method embodiment shown in fig. 3, and achieve the same technical effects, and for avoiding repetition, a detailed description is omitted herein.
Referring to fig. 20, fig. 20 is a block diagram of a signal measurement device according to an embodiment of the present application, and as shown in fig. 20, a signal measurement device 2000 includes:
a measurement module 2001, configured to measure a target signal to obtain a measurement result;
The target signal comprises M sections of chirped Chirp signals, wherein M is a positive integer greater than 1;
For two adjacent segments of the M segments of the Chirp signals, the starting frequency of the next segment of the Chirp signal is the ending frequency of the previous segment of the Chirp signal, and the frequency modulation slopes of the two adjacent segments of the Chirp signals are different.
Optionally, the M-segment Chirp signal has at least one of the following characteristics:
the sum of bandwidths of the M segments of Chirp signals is equal to the bandwidth of the target signal;
The polarity of the frequency modulation slope of the M-segment Chirp signals is the same;
the sum of the frequency modulation slopes of the M-segment Chirp signals satisfiesTi is the frequency modulation slope of the ith Chirp signal, B is the bandwidth of the target signal, Ti is the duration of the ith Chirp signal, and TChirp is the average value of the duration of the M Chirp signals;
the sum of the duration of the M segments of Chirp signals is equal to the duration of the target signal;
The duration of the M-segment Chirp signals is the same;
the duration of each of the M segments of Chirp signals is the same as the duration of an orthogonal frequency division multiplexing OFDM symbol, and the OFDM symbol contains a cyclic prefix CP or does not contain a CP.
Optionally, the first parameter of at least one of the M-segment Chirp signals is associated with target information, where the target information includes at least one of the following:
Perceptual information, time domain resource information, frequency domain resource information, antenna port index, number of antenna ports, code division multiplexing CDM group index, number of CDM groups, antenna index, number of antennas, codeword index.
Optionally, the first parameter of the at least one piece of Chirp signal includes at least one of:
frequency modulation slope, start frequency point, end frequency point, bandwidth.
Optionally, the perception information includes at least one of:
The sensing area identification, the identification for indicating whether to be used for sensing, the sensing service identification, the sensing service type identification, the sensing target identification, the tag identification associated with the sensing target, the number of the sensing targets and the equipment information participating in sensing measurement.
Optionally, the second device measures the target signal to obtain a measurement result, including:
And the second equipment measures the target signals sent by the first equipment through the plurality of antenna ports to obtain a measurement result, wherein the frequency modulation slopes of the target signals sent by different antenna ports are different.
Optionally, the different frequency modulation slopes of the target signals sent by the different antenna ports include at least one of:
the frequency modulation slopes of the h-th-stage Chirp signals of the target signals transmitted by different antenna ports are different;
The frequency modulation slope of the h-th-segment Chirp signal of the target signal sent by one antenna port of the plurality of antenna ports is different from the frequency modulation slope of the j-th-segment Chirp signal of the target signal sent by other antenna ports;
Wherein h is a positive integer less than or equal to M, j is a positive integer less than or equal to M, and j is not equal to h.
Optionally, the absolute values of the frequency modulation slopes of the target signals transmitted by different antenna ports are uniformly distributed within the same value range, and the absolute values of the frequency modulation slopes of the target signals transmitted by different antenna terminals are different or have different polarities, or
The absolute values of the frequency modulation slopes of the target signals sent by different antenna ports are uniformly distributed in different value ranges respectively, and the absolute values of the frequency modulation slopes of the target signals sent by different antenna terminals are different in size or polarity.
Optionally, the target signal is time-division multiplexed with other signals, where the other signals are different signals from the target signal in the OFDM system.
Optionally, a second parameter of the target signal is associated with the perceived need information, and the second parameter includes at least one of:
A transmission period, a time interval, a bandwidth, a duration, the number of the target signals, and a total duration of the target signals transmitted by the first device.
Optionally, in the case that the first device transmits a plurality of the target signals, a time interval between adjacent target signals among the plurality of target signals satisfies a maximum non-ambiguous speed measurement range requirement or a maximum non-ambiguous doppler measurement range requirement;
Or alternatively, the first and second heat exchangers may be,
The total duration of the target signal sent by the first device meets the Doppler resolution requirement or the speed resolution requirement;
Or alternatively, the first and second heat exchangers may be,
The bandwidth of the target signal meets the delay resolution requirement or the distance resolution requirement.
Optionally, the apparatus further includes:
the transmission module is used for sending or receiving indication information, and the indication information is used for indicating at least one of the following:
Configuration information, measurement configuration information and measurement auxiliary information of the target signal.
Optionally, the configuration information of the target signal includes at least one of:
The number of Chirp signal segments contained by the target signal;
Frequency modulation slope information of at least one section of Chirp signal in the target signal;
frequency domain resource information of at least one section of Chirp signal in the target signal;
Time domain resource information of at least one section of Chirp signal in the target signal;
Antenna port information of the target signal;
at least one item of target information, wherein the target information is information related to a first parameter of at least one section of Chirp signals in the M sections of Chirp signals.
Optionally, the frequency domain resource information includes at least one of:
the method comprises the steps of starting frequency of at least one section of Chirp signal in the target signal, ending frequency of at least one section of Chirp signal in the target signal and bandwidth information of at least one section of Chirp signal in the target signal.
Optionally, the antenna port information includes at least one of:
Mapping relation between at least one antenna port and frequency modulation slope;
Mapping relation between at least one antenna port and termination frequency;
mapping relation between at least one antenna port and initial frequency;
mapping relation between at least one antenna port and bandwidth;
a frequency modulation slope calculation mode corresponding to at least one antenna port;
a calculation mode of a termination frequency corresponding to at least one antenna port;
a calculation mode of an initial frequency corresponding to at least one antenna port;
a calculation mode of the bandwidth corresponding to at least one antenna port;
Total antenna port number;
antenna port index information.
The signal measuring device can improve the measuring performance of equipment.
The signal measuring device in the embodiment of the application can be an electronic device, for example, an electronic device with an operating system, or can be a component in the electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal or a network side device.
The signal measurement device provided by the embodiment of the application can realize each process realized by the method embodiment shown in fig. 5 and achieve the same technical effects, and in order to avoid repetition, the description is omitted here.
Optionally, as shown in fig. 21, the embodiment of the present application further provides a communication device 2100, including a processor 2101 and a memory 2102, where the memory 2102 stores a program or instructions executable on the processor 2101, for example, when the communication device 2100 is a first device, the program or instructions implement the steps of the foregoing signaling method embodiment when executed by the processor 2101, and achieve the same technical effects. When the communication device 2100 is a second device, the program or the instructions when executed by the processor 2101 implement the steps of the signal measurement method embodiment described above, and achieve the same technical effects, and are not repeated herein.
The embodiment of the application also provides communication equipment which comprises a processor and a communication interface, wherein the communication interface is used for sending a target signal which is used for measurement, the target signal comprises M sections of chirped Chirp signals, M is a positive integer greater than 1, for two adjacent sections of the M sections of the Chirp signals, the initial frequency of the next section of the Chirp signals is the termination frequency of the previous section of the Chirp signals, and the frequency modulation slopes of the two adjacent sections of the Chirp signals are different. The communication device embodiment corresponds to the signal sending method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the communication device embodiment, and the same technical effects can be achieved.
Specifically, fig. 22 is a schematic hardware structure of an apparatus for implementing an embodiment of the present application, where the apparatus is a first apparatus or a second apparatus.
The device 2200 includes, but is not limited to, at least some of the components of a radio frequency unit 2201, a network module 2202, an audio output unit 2203, an input unit 2204, a sensor 2205, a display unit 2206, a user input unit 2207, an interface unit 2208, a memory 2209, a processor 2210, and the like.
Those skilled in the art will appreciate that the device 2200 may also include a power source (e.g., a battery) for powering the various components, which may be logically connected to the processor 2210 by a power management system to perform functions such as managing charge, discharge, and power consumption by the power management system. The device structure shown in fig. 22 does not constitute a limitation of the device, and the device may comprise more or less components than shown, or may combine certain components, or may be arranged in different components, which are not described in detail herein.
It should be appreciated that in embodiments of the present application, the input unit 2204 may include a graphics processing unit (Graphics Processing Unit, GPU) 22041 and a microphone 22042, where the graphics processing unit 22041 processes image data of still pictures or video obtained by an image capture device (e.g., a camera) in a video capture mode or an image capture mode. The display unit 2206 may include a display panel 22061, and the display panel 22061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 2207 includes at least one of a touch panel 22071 and other input devices 22072. Touch panel 22071, also referred to as a touch screen. The touch panel 22071 may include two parts, a touch detection device and a touch controller. Other input devices 22072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.
In the embodiment of the present application, after receiving the downlink data from the network side device, the radio frequency unit 2201 may transmit the downlink data to the processor 2210 for processing, and in addition, the radio frequency unit 2201 may send the uplink data to the network side device. In general, the radio frequency unit 2201 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
The memory 2209 may be used to store software programs or instructions and various data. The memory 2209 may mainly include a first memory area storing programs or instructions and a second memory area storing data, wherein the first memory area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 2209 may include volatile memory or nonvolatile memory, or the memory 2209 may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM), static random access memory (STATIC RAM, SRAM), dynamic random access memory (DYNAMIC RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate Synchronous dynamic random access memory (Double DATA RATE SDRAM, DDRSDRAM), enhanced Synchronous dynamic random access memory (ENHANCED SDRAM, ESDRAM), synchronous link dynamic random access memory (SYNCH LINK DRAM, SLDRAM), and Direct random access memory (DRRAM). Memory 2209 in embodiments of the application includes, but is not limited to, these and any other suitable types of memory.
Processor 2210 may include one or more processing units, and optionally, processor 2210 integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, and the like, and a modem processor that primarily processes wireless communication signals, such as a baseband processor. It is to be appreciated that the modem processor described above may not be integrated into the processor 2210.
In this embodiment, the above device is taken as a first device, and the first device is exemplified as a terminal.
A radio frequency unit 2201 for transmitting a target signal, the target signal being used for measurement;
The target signal comprises M sections of chirped Chirp signals, wherein M is a positive integer greater than 1;
For two adjacent segments of the M segments of the Chirp signals, the starting frequency of the next segment of the Chirp signal is the ending frequency of the previous segment of the Chirp signal, and the frequency modulation slopes of the two adjacent segments of the Chirp signals are different.
Optionally, the M-segment Chirp signal has at least one of the following characteristics:
the sum of bandwidths of the M segments of Chirp signals is equal to the bandwidth of the target signal;
The polarity of the frequency modulation slope of the M-segment Chirp signals is the same;
the sum of the frequency modulation slopes of the M-segment Chirp signals satisfiesTi is the frequency modulation slope of the ith Chirp signal, B is the bandwidth of the target signal, Ti is the duration of the ith Chirp signal, and TChirp is the average value of the duration of the M Chirp signals;
the sum of the duration of the M segments of Chirp signals is equal to the duration of the target signal;
The duration of the M-segment Chirp signals is the same;
the duration of each of the M segments of Chirp signals is the same as the duration of an orthogonal frequency division multiplexing OFDM symbol, and the OFDM symbol contains a cyclic prefix CP or does not contain a CP.
Optionally, the first parameter of at least one of the M-segment Chirp signals is associated with target information, where the target information includes at least one of the following:
Perceptual information, time domain resource information, frequency domain resource information, antenna port index, number of antenna ports, code division multiplexing CDM group index, number of CDM groups, antenna index, number of antennas, codeword index.
Optionally, the first parameter of the at least one piece of Chirp signal includes at least one of:
frequency modulation slope, start frequency point, end frequency point, bandwidth.
Optionally, the perception information includes at least one of:
The sensing area identification, the identification for indicating whether to be used for sensing, the sensing service identification, the sensing service type identification, the sensing target identification, the tag identification associated with the sensing target, the number of the sensing targets and the equipment information participating in sensing measurement.
Optionally, the sending the target signal includes:
And transmitting the target signal through a plurality of antenna ports, wherein the frequency modulation slope of the target signal transmitted by different antenna ports is different.
Optionally, the different frequency modulation slopes of the target signals sent by the different antenna ports include at least one of:
the frequency modulation slopes of the h-th-stage Chirp signals of the target signals transmitted by different antenna ports are different;
The frequency modulation slope of the h-th-segment Chirp signal of the target signal sent by one antenna port of the plurality of antenna ports is different from the frequency modulation slope of the j-th-segment Chirp signal of the target signal sent by other antenna ports;
Wherein h is a positive integer less than or equal to M, j is a positive integer less than or equal to M, and j is not equal to h.
Optionally, the absolute values of the frequency modulation slopes of the target signals transmitted by different antenna ports are uniformly distributed within the same value range, and the absolute values of the frequency modulation slopes of the target signals transmitted by different antenna terminals are different or have different polarities, or
The absolute values of the frequency modulation slopes of the target signals sent by different antenna ports are uniformly distributed in different value ranges respectively, and the absolute values of the frequency modulation slopes of the target signals sent by different antenna terminals are different in size or polarity.
Optionally, the time domain or frequency domain resources occupied by the target signals sent by different antenna ports in the plurality of antenna ports are the same.
Optionally, the target signal is time-division multiplexed with other signals, where the other signals are different signals from the target signal in the OFDM system.
Optionally, a second parameter of the target signal is associated with the perceived need information, and the second parameter includes at least one of:
A transmission period, a time interval, a bandwidth, a duration, the number of the target signals, and a total duration of the target signals transmitted by the first device.
Optionally, in the case that the first device transmits a plurality of the target signals, a time interval between adjacent target signals among the plurality of target signals satisfies a maximum non-ambiguous speed measurement range requirement or a maximum non-ambiguous doppler measurement range requirement;
Or alternatively, the first and second heat exchangers may be,
The total duration of the target signal sent by the first device meets the Doppler resolution requirement or the speed resolution requirement;
Or alternatively, the first and second heat exchangers may be,
The bandwidth of the target signal meets the delay resolution requirement or the distance resolution requirement.
Optionally, the radio frequency unit 2201 is further configured to:
Receiving or transmitting indication information, wherein the indication information is used for indicating at least one of the following:
Configuration information, measurement configuration information and measurement auxiliary information of the target signal.
Optionally, the configuration information of the target signal includes at least one of:
The number of Chirp signal segments contained by the target signal;
Frequency modulation slope information of at least one section of Chirp signal in the target signal;
frequency domain resource information of at least one section of Chirp signal in the target signal;
Time domain resource information of at least one section of Chirp signal in the target signal;
Antenna port information of the target signal;
at least one item of target information, wherein the target information is information related to a first parameter of at least one section of Chirp signals in the M sections of Chirp signals.
Optionally, the frequency domain resource information includes at least one of:
the method comprises the steps of starting frequency of at least one section of Chirp signal in the target signal, ending frequency of at least one section of Chirp signal in the target signal and bandwidth information of at least one section of Chirp signal in the target signal.
Optionally, the antenna port information includes at least one of:
Mapping relation between at least one antenna port and frequency modulation slope;
Mapping relation between at least one antenna port and termination frequency;
mapping relation between at least one antenna port and initial frequency;
mapping relation between at least one antenna port and bandwidth;
a frequency modulation slope calculation mode corresponding to at least one antenna port;
a calculation mode of a termination frequency corresponding to at least one antenna port;
a calculation mode of an initial frequency corresponding to at least one antenna port;
a calculation mode of the bandwidth corresponding to at least one antenna port;
Total antenna port number;
antenna port index information.
The device can improve the measurement performance of the device.
It can be appreciated that, in the implementation process of each implementation manner mentioned in this embodiment, reference may be made to the description related to the above-mentioned sensing measurement result sending method, and the same or corresponding technical effects are achieved, so that repetition is avoided, and no further description is given here.
It should be noted that the above apparatus may also implement the steps in the method shown in fig. 16, or may implement the method performed by each module shown in fig. 20.
The embodiment of the application also provides equipment, which comprises a processor and a communication interface, wherein the communication interface is coupled with the processor, and the processor is used for running programs or instructions to realize the steps of the embodiment of the method shown in fig. 16. The embodiment of the device corresponds to the signal measurement method and the embodiment of the signal measurement method, and each implementation process and implementation manner of the embodiment of the method can be applied to the embodiment of the device and can achieve the same technical effect.
The embodiment of the application also provides equipment, which comprises a processor and a communication interface, wherein the communication interface is used for measuring a target signal to obtain a measurement result, the target signal comprises M sections of Chirp signals, M is a positive integer greater than 1, for two adjacent sections of Chirp signals in the M sections of Chirp signals, the initial frequency of the next section of Chirp signals is the termination frequency of the previous section of Chirp signals, and the frequency modulation slopes of the two adjacent sections of Chirp signals are different.
Specifically, the embodiment of the application also provides a device, which is the first device or the second device. As shown in fig. 23, the apparatus 2300 includes an antenna 2301, a radio frequency device 2302, a baseband device 2303, a processor 2304, and a memory 2305. The antenna 2301 is connected to a radio frequency device 2302. In the uplink direction, the radio frequency device 2302 receives information via the antenna 2301, and transmits the received information to the baseband device 2303 for processing. In the downlink direction, the baseband apparatus 2303 processes information to be transmitted, and transmits the processed information to the radio frequency apparatus 2302, and the radio frequency apparatus 2302 processes the received information and transmits the processed information through the antenna 2301.
The signal measurement method in the above embodiment may be implemented in the baseband apparatus 2303, the baseband apparatus 2303 including a baseband processor.
The baseband apparatus 2303 may include, for example, at least one baseband board on which a plurality of chips are disposed, as shown in fig. 23, where one chip, for example, a baseband processor, is connected to the memory 2305 through a bus interface to call a program in the memory 2305 to perform the device operations shown in the above method embodiment.
The device may also include a network interface 2306, such as a common public radio interface (Common Public Radio Interface, CPRI).
Specifically, the device 2300 of the embodiment of the present application further includes instructions or programs stored in the memory 2305 and capable of running on the processor 2304, and the processor 2304 invokes the instructions or programs in the memory 2305 to execute the method executed by each module shown in fig. 20, and achieve the same technical effects, so that repetition is avoided and therefore a description thereof is omitted.
In this embodiment, the above device is exemplified as the second device.
The radio frequency device 2302 is configured to measure a target signal to obtain a measurement result;
The target signal comprises M sections of chirped Chirp signals, wherein M is a positive integer greater than 1;
For two adjacent segments of the M segments of the Chirp signals, the starting frequency of the next segment of the Chirp signal is the ending frequency of the previous segment of the Chirp signal, and the frequency modulation slopes of the two adjacent segments of the Chirp signals are different.
Optionally, the M-segment Chirp signal has at least one of the following characteristics:
the sum of bandwidths of the M segments of Chirp signals is equal to the bandwidth of the target signal;
The polarity of the frequency modulation slope of the M-segment Chirp signals is the same;
the sum of the frequency modulation slopes of the M-segment Chirp signals satisfiesTi is the frequency modulation slope of the ith Chirp signal, B is the bandwidth of the target signal, Ti is the duration of the ith Chirp signal, and TChirp is the average value of the duration of the M Chirp signals;
the sum of the duration of the M segments of Chirp signals is equal to the duration of the target signal;
The duration of the M-segment Chirp signals is the same;
the duration of each of the M segments of Chirp signals is the same as the duration of an orthogonal frequency division multiplexing OFDM symbol, and the OFDM symbol contains a cyclic prefix CP or does not contain a CP.
Optionally, the first parameter of at least one of the M-segment Chirp signals is associated with target information, where the target information includes at least one of the following:
Perceptual information, time domain resource information, frequency domain resource information, antenna port index, number of antenna ports, code division multiplexing CDM group index, number of CDM groups, antenna index, number of antennas, codeword index.
Optionally, the first parameter of the at least one piece of Chirp signal includes at least one of:
frequency modulation slope, start frequency point, end frequency point, bandwidth.
Optionally, the perception information includes at least one of:
The sensing area identification, the identification for indicating whether to be used for sensing, the sensing service identification, the sensing service type identification, the sensing target identification, the tag identification associated with the sensing target, the number of the sensing targets and the equipment information participating in sensing measurement.
Optionally, the second device measures the target signal to obtain a measurement result, including:
And the second equipment measures the target signals sent by the first equipment through the plurality of antenna ports to obtain a measurement result, wherein the frequency modulation slopes of the target signals sent by different antenna ports are different.
Optionally, the different frequency modulation slopes of the target signals sent by the different antenna ports include at least one of:
the frequency modulation slopes of the h-th-stage Chirp signals of the target signals transmitted by different antenna ports are different;
The frequency modulation slope of the h-th-segment Chirp signal of the target signal sent by one antenna port of the plurality of antenna ports is different from the frequency modulation slope of the j-th-segment Chirp signal of the target signal sent by other antenna ports;
Wherein h is a positive integer less than or equal to M, j is a positive integer less than or equal to M, and j is not equal to h.
Optionally, the absolute values of the frequency modulation slopes of the target signals transmitted by different antenna ports are uniformly distributed within the same value range, and the absolute values of the frequency modulation slopes of the target signals transmitted by different antenna terminals are different or have different polarities, or
The absolute values of the frequency modulation slopes of the target signals sent by different antenna ports are uniformly distributed in different value ranges respectively, and the absolute values of the frequency modulation slopes of the target signals sent by different antenna terminals are different in size or polarity.
Optionally, the target signal is time-division multiplexed with other signals, where the other signals are different signals from the target signal in the OFDM system.
Optionally, a second parameter of the target signal is associated with the perceived need information, and the second parameter includes at least one of:
A transmission period, a time interval, a bandwidth, a duration, the number of the target signals, and a total duration of the target signals transmitted by the first device.
Optionally, in the case that the first device transmits a plurality of the target signals, a time interval between adjacent target signals among the plurality of target signals satisfies a maximum non-ambiguous speed measurement range requirement or a maximum non-ambiguous doppler measurement range requirement;
Or alternatively, the first and second heat exchangers may be,
The total duration of the target signal sent by the first device meets the Doppler resolution requirement or the speed resolution requirement;
Or alternatively, the first and second heat exchangers may be,
The bandwidth of the target signal meets the delay resolution requirement or the distance resolution requirement.
Optionally, the radio frequency device 2302 is further configured to:
Transmitting or receiving indication information, wherein the indication information is used for indicating at least one of the following:
Configuration information, measurement configuration information and measurement auxiliary information of the target signal.
Optionally, the configuration information of the target signal includes at least one of:
The number of Chirp signal segments contained by the target signal;
Frequency modulation slope information of at least one section of Chirp signal in the target signal;
frequency domain resource information of at least one section of Chirp signal in the target signal;
Time domain resource information of at least one section of Chirp signal in the target signal;
Antenna port information of the target signal;
at least one item of target information, wherein the target information is information related to a first parameter of at least one section of Chirp signals in the M sections of Chirp signals.
Optionally, the frequency domain resource information includes at least one of:
the method comprises the steps of starting frequency of at least one section of Chirp signal in the target signal, ending frequency of at least one section of Chirp signal in the target signal and bandwidth information of at least one section of Chirp signal in the target signal.
Optionally, the antenna port information includes at least one of:
Mapping relation between at least one antenna port and frequency modulation slope;
Mapping relation between at least one antenna port and termination frequency;
mapping relation between at least one antenna port and initial frequency;
mapping relation between at least one antenna port and bandwidth;
a frequency modulation slope calculation mode corresponding to at least one antenna port;
a calculation mode of a termination frequency corresponding to at least one antenna port;
a calculation mode of an initial frequency corresponding to at least one antenna port;
a calculation mode of the bandwidth corresponding to at least one antenna port;
Total antenna port number;
antenna port index information.
The device can improve the measurement performance of the device.
It can be appreciated that the implementation process of each implementation manner mentioned in this embodiment may refer to the related description of the method embodiment and achieve the same or corresponding technical effects, and will not be repeated herein for avoiding repetition.
It should be noted that the above apparatus may also implement the steps in the method shown in fig. 3, or may implement the method performed by each module shown in fig. 19.
The embodiment of the application also provides a readable storage medium, on which a program or an instruction is stored, which when executed by a processor, implements each process of the above signal transmission method or the signal measurement method embodiment, and can achieve the same technical effects, so that repetition is avoided, and no further description is given here.
Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc. In some examples, the readable storage medium may be a non-transitory readable storage medium.
The embodiment of the application further provides a chip, the chip comprises a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running a program or instructions, the processes of the signal sending method or the signal measuring method embodiment can be realized, the same technical effects can be achieved, and the repetition is avoided, and the description is omitted here.
It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.
The embodiments of the present application further provide a computer program/program product, where the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement each process of the foregoing signal transmission method or the signal measurement method embodiment, and achieve the same technical effects, so that repetition is avoided, and details are not repeated herein.
The embodiment of the application also provides a wireless communication system, which comprises a first device and a second device, wherein the first device can be used for executing the steps of the signal transmission method provided by the embodiment of the application, and the second device can be used for executing the steps of the signal measurement method provided by the embodiment of the application.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
From the description of the embodiments above, it will be apparent to those skilled in the art that the above-described example methods may be implemented by means of a computer software product plus a necessary general purpose hardware platform, but may also be implemented by hardware. The computer software product is stored on a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes instructions for causing a terminal or network side device to perform the methods according to the embodiments of the present application.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms of embodiments may be made by those of ordinary skill in the art without departing from the spirit of the application and the scope of the claims, which fall within the protection of the present application.