Disclosure of Invention
In order to solve the technical problems, the invention provides an orthogonal hybrid beam forming method, an orthogonal hybrid beam forming device and an array antenna, which use two one-dimensional orthogonal beam forming networks to realize space two-dimensional beam scanning, simplify an analog beam forming network through dimension reduction, simplify a digital beam forming method and reduce the data volume to be processed, thereby realizing low-cost application of a system and improving practicability.
The invention provides an orthogonal mixed beam forming method, which comprises the following steps:
The method comprises the steps of 1, setting a first radiation unit and a second radiation unit on an array antenna, obtaining a first target point based on the first radiation unit, obtaining a second target point based on the second radiation unit, wherein the first radiation unit is orthogonal with the second radiation unit;
Step 2, obtaining a three-dimensional simplified target point based on the first target point and the second target point;
Step 3, obtaining a real target point based on the three-dimensional simplified target point;
and 4, returning to the positive coordinate system according to the inclination angle of the array antenna.
Preferably, the step1 includes:
Obtaining first echo data based on a first radiation unit, obtaining a first target point a1(X1,θ1 based on the first echo data, wherein X1 represents a first target point distance in polar coordinates, and theta1 represents a first target point angle in polar coordinates, obtaining second echo data based on a second radiation unit, and obtaining a second target point a2(X2,θ2 based on the second echo data), wherein X2 represents a second target point distance in polar coordinates, and theta2 represents a second target point angle in polar coordinates.
Preferably, the step 2 includes:
A three-dimensional simplified target point a (X, Y, Z) is obtained based on the first target point and the second target point, satisfying ：X＝X2cosθ2,Y＝X1 sinθ1,Z＝X1 cosθ1＝X2 sinθ2, wherein X, Y, Z represent three-dimensional coordinates of the three-dimensional simplified target point, respectively.
Preferably, the step 3 includes:
performing delay correction on the three-dimensional simplified target point to obtain a real target point ak(Xk,Yk,Zk), and meeting the following conditions: Wherein 2< k, Xk,Yk,Zk respectively represents the three-dimensional coordinates of the three-dimensional simplified target point obtained by the kth reception, Xk-2,Yk-2,Zk-2 respectively represents the three-dimensional coordinates of the three-dimensional simplified target point obtained by the kth-2 reception, and Xk-1,Yk-1,Zk-1 respectively represents the three-dimensional coordinates of the three-dimensional simplified target point obtained by the kth-1 reception.
Preferably, after obtaining the real target point ak, the method further includes:
obtaining an echo data model based on the real target point ak
Wherein, the compensation vector beta (delta X, delta Y, delta Z), V is the sum of the moving speeds of the radar and the test object, and t is time;
Obtaining a final echo data model based on the echo data model approximation operation
Wherein, theΜ is the angle of the test object in three-dimensional coordinates.
Compared with the prior art, the orthogonal hybrid beam forming method has the advantages that a first target point is obtained based on a first radiation unit, a second target point is obtained based on a second radiation unit, wherein the first radiation unit is orthogonal to the second radiation unit, a three-dimensional simplified target point is obtained based on the first target point and the second target point, a real target point is obtained based on the three-dimensional simplified target point, and a positive coordinate system is returned according to the inclination angle of an array antenna. By using two one-dimensional orthogonal beam forming networks to realize space two-dimensional beam scanning, by dimension reduction, the analog beam forming network is simplified, the digital beam forming method is simplified, and the data volume required to be processed is reduced, so that the low-cost application of the system is realized, and the practicability is high.
The invention also provides an orthogonal mixed beam forming device, which comprises:
The system comprises a target point acquisition module, a target point acquisition module and a target point acquisition module, wherein the target point acquisition module is used for acquiring a first target point based on a first radiation unit;
The three-dimensional target point acquisition module is used for acquiring a three-dimensional simplified target point based on the first target point and the second target point;
the real target point acquisition module is used for acquiring a real target point based on the three-dimensional target point;
and the coordinate system correcting module is used for correcting the coordinate system according to the inclination angle of the array antenna.
Compared with the prior art, the beneficial effects of the orthogonal hybrid beamforming device provided by the invention are the same as those of the orthogonal hybrid beamforming method described in the technical scheme, and the description is omitted herein.
The present invention also provides an orthogonal hybrid beamforming array antenna comprising:
The device comprises a first radiation unit, a second radiation unit, a base, a rotating seat, a refraction plate and a preset scanning unit, wherein the rotating seat and the preset scanning unit are arranged on the base, the refraction plate is arranged on the rotating seat, the first radiation unit and the second radiation unit which are opposite are arranged on the inner side of the refraction plate, and the preset scanning unit is a one-dimensional beam scanning unit.
Preferably, the refraction plate comprises two first arc-shaped plates and two second arc-shaped plates, the two first arc-shaped plates and the two second arc-shaped plates are connected smoothly and excessively and encircle to form a ring, the two second arc-shaped plates are arranged between the two first arc-shaped plates, and the inclination angles of the two second arc-shaped plates are larger than those of the two first arc-shaped plates.
Preferably, the refraction plate further comprises a supporting shell, a stroke cylinder, a mirror plate array, a torsion spring connecting pin and a refraction mirror plate, wherein the supporting shell is arranged on the rotating seat, a plurality of stroke cylinders are arranged on the inner side of the supporting shell, and the stroke cylinders are in an annular array;
The output ends of the stroke cylinders are provided with a plurality of mirror plate arrays, the mirror plate arrays are connected through torsion spring connecting pins, a plurality of refraction mirror plates are embedded into the inner sides of the mirror plate arrays, and the refraction mirror plates are in one-to-one correspondence with the mirror plate arrays.
Preferably, a rubber connecting layer is arranged between the plurality of mirror plate arrays, the rubber connecting layer is arranged at the inner side edge of the mirror plate arrays, and the rubber connecting layer is compressed by folding.
Compared with the prior art, the orthogonal hybrid beam forming array antenna has the advantages that the scanning range is improved through phase change of the array antenna direction in the rotating radar of the rotating seat, the accurate scanning range of the orthogonal antenna deviates to an ellipse, the target is found through the preset scanning unit, and then the array antenna direction in the radar is adjusted to perform formal scanning, so that the long side of the scanning range aims at the target, the stay time of the target in the scanning range is improved, and the scanning effect is improved.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Detailed Description
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The term "plurality" as used in this embodiment means two or more. "and/or" describes an association relationship of an association object, and indicates that there may be three relationships, for example, A and/or B, and may indicate that A exists alone, A and B exist together, and B exists alone. The words "exemplary" or "such as" are used to mean serving as an example, instance, or illustration, intended to present concepts related in a specific manner, and should not be interpreted as being preferred or advantageous over other embodiments or designs.
An embodiment of the present invention provides an orthogonal hybrid beamforming method, and fig. 1 shows a flowchart of the orthogonal hybrid beamforming method provided by the embodiment of the present invention. As shown in fig. 1, the method includes:
And 1, arranging a first radiating element and a second radiating element on the array antenna, acquiring a first target point based on the first radiating element, and acquiring a second target point based on the second radiating element, wherein the first radiating element is orthogonal with the second radiating element.
It should be noted that, a first radiation unit and a second radiation unit are disposed on an array antenna in the radar, where the first radiation unit transmits and receives a microwave signal to obtain first echo data, and obtains a first target point a1(X1,θ1 according to the first echo data), where X1 represents a first target point distance in polar coordinates, θ1 represents a first target point angle in polar coordinates, the second radiation unit transmits and receives a microwave signal to obtain second echo data, and obtains a second target point a2(X2,θ2 according to the second echo data, where X2 represents a second target point distance in polar coordinates, and θ2 represents a second target point angle in polar coordinates.
And 2, obtaining a three-dimensional simplified target point based on the first target point and the second target point.
It should be noted that, the first radiation unit is orthogonal to the second radiation unit, the radiation direction of the first radiation unit is taken as an X axis, the radiation direction of the second radiation unit is taken as a Y axis, and simplification is performed based on the first target point a1(X1,θ1) and the second target point a2(X2,θ2), so as to obtain a three-dimensional simplified target point a (X, Y, Z), which satisfies ：X＝X2 cosθ2,Y＝X1 sinθ1,Z＝X1 cosθ1＝X2 sinθ2,, where X, Y, Z respectively represent three-dimensional coordinates of the three-dimensional simplified target point.
And 3, obtaining a real target point based on the three-dimensional simplified target point.
It should be noted that, delay correction is performed on the three-dimensional simplified target point to obtain the real target point ak(Xk,Yk,Zk), which satisfies:
Wherein 2< k, Xk,Yk,Zk respectively represents the three-dimensional coordinates of the three-dimensional simplified target point obtained by the kth reception, Xk-2,Yk-2,Zk-2 respectively represents the three-dimensional coordinates of the three-dimensional simplified target point obtained by the kth-2 reception, and Xk-1,Yk-1,Zk-1 respectively represents the three-dimensional coordinates of the three-dimensional simplified target point obtained by the kth-1 reception.
And 4, returning to the positive coordinate system according to the inclination angle of the array antenna in the radar, wherein the horizontal plane is taken as a X, Y axis.
After obtaining the real target point ak, the method further includes:
Obtaining echo data model based on real target point ak
Wherein, the compensation vector beta (delta X, delta Y, delta Z), V is the sum of the moving speeds of the radar and the test object, and t is time;
Obtaining final echo data model based on echo data model approximation operation
Wherein, theΜ is the angle of the test object in three-dimensional coordinates.
Compared with the prior art, the orthogonal hybrid beam forming method has the advantages that two one-dimensional orthogonal beam forming networks are used for realizing space two-dimensional beam scanning, the analog beam forming network is simplified through dimension reduction, the digital beam forming method is simplified, and the data quantity to be processed is reduced, so that the low-cost application of the system is realized, and the practicability is high.
An embodiment of the present invention provides an orthogonal hybrid beamforming device, and fig. 2 shows a schematic structural diagram of the orthogonal hybrid beamforming device provided by the embodiment of the present invention. As shown in fig. 2, the apparatus includes:
An object point acquisition module 1 for acquiring a first object point based on a first radiation unit, acquiring a second object point based on a second radiation unit, wherein the first radiation unit is orthogonal to the second radiation unit;
A three-dimensional target point acquisition module 2 for acquiring a three-dimensional simplified target point based on the first target point and the second target point;
A real target point acquisition module 3 for acquiring a real target point based on the three-dimensional target point;
The coordinate system correcting module 4 is configured to correct the coordinate system according to the tilt angle of the array antenna in the radar, so that the polar coordinates of the first target point and the second target point are not brought into the tilt angle of the array antenna for convenient calculation, the obtained real target point uses the array antenna as a reference system, and the coordinate system correcting module 4 is brought into the tilt angle of the array antenna, and uses the ground as a reference system. Specifically, the obtained real target point takes the center of the array antenna as an origin, one of the scanning edges of the array antenna as an X axis, namely, the reference system moves along with the movement of the radar, and the coordinate system correcting module 4 brings the inclination angle of the array antenna, so that the coordinate system takes the ground as the X axis again.
Compared with the prior art, the beneficial effects of the orthogonal hybrid beamforming device provided by the embodiment of the invention are the same as those of the orthogonal hybrid beamforming method described in the above technical scheme, and are not described in detail herein.
An embodiment of the present invention provides an orthogonal hybrid beamforming array antenna, and fig. 3 shows an overall structure schematic diagram of the orthogonal hybrid beamforming array antenna provided by the embodiment of the present invention. As shown in fig. 3, the array antenna includes:
The device comprises a first radiation unit 1, a second radiation unit 2, a base 3, a rotating seat 4, a refraction plate 5 and a preset scanning unit 6, wherein the rotating seat 4 and the preset scanning unit 6 are arranged on the base 3, the refraction plate 5 is arranged on the rotating seat 4, the first radiation unit 1 and the second radiation unit 2 which are opposite are arranged on the inner side of the refraction plate 5, and the preset scanning unit 6 is a one-dimensional beam scanning unit.
According to the arrangement of the array antenna, the scanning range is increased by rotating the array antenna to change the phase in the direction, and as the accurate scanning range of the orthogonal antenna deviates from an ellipse, the target is found through the preset scanning unit 6, and then the array antenna is adjusted to perform formal scanning, so that the long side of the scanning range is aligned with the target, the stay time of the target in the scanning range is increased, and the scanning effect is improved. The setting of the preset scanning unit 6 adopts a one-dimensional wave beam with simple data, and reduces the data processing requirement.
Fig. 4 shows a schematic structural diagram of a refraction plate in an array antenna according to an embodiment of the present invention, as shown in fig. 4, the refraction plate 5 includes two first arc plates 51 and two second arc plates 52, the two first arc plates 51 and the two second arc plates 52 are smoothly and excessively connected and encircle to form a ring, the two second arc plates 52 are disposed between the two first arc plates 51, and the inclination angle of the two second arc plates 52 is larger than that of the two first arc plates 51. Specifically, the first arc plate 51 is disposed outside the first radiation unit 1, and the second arc plate 52 is disposed outside the second radiation unit 2.
In the embodiment of the invention, the refraction plate 5 is arranged, different refraction angles are provided by utilizing the principle that the incident angle is equal to the exit angle, the scanning range is enlarged, the scanning range is close to a circle, and the scanning effect is improved.
Fig. 5 shows a schematic cross-sectional view of a refraction plate in an array antenna according to an embodiment of the present invention, as shown in fig. 5, the refraction plate 5 further includes a support housing 53, a stroke cylinder 54, a mirror plate array 55, a torsion spring connection pin 56, and a refraction mirror plate 57, where the rotation seat 4 is provided with the support housing 53, and a plurality of stroke cylinders 54 are provided inside the support housing 53, and the plurality of stroke cylinders 54 are in a ring array. As shown in fig. 5, a plurality of mirror plate arrays 55 are disposed at the output ends of the stroke cylinders 54, the mirror plate arrays 55 are connected by torsion spring connection pins 56, a plurality of refraction mirror plates 57 are embedded inside the mirror plate arrays 55, and the refraction mirror plates 57 are in one-to-one correspondence with the mirror plate arrays 55.
In the embodiment of the invention, the refraction plate 55 is arranged, and the scanning range is scaled by adjusting the refraction angle, so that the wide-range scanning and the accurate scanning can be realized.
As shown in fig. 5, a rubber connection layer is provided between the plurality of mirror plate arrays 55, the rubber connection layer being provided at an inner side edge of the mirror plate arrays 55, the rubber connection layer being compressed by folding.
The embodiment of the invention provides an orthogonal hybrid beam forming array antenna, which improves the scanning range by rotating the phase change of the array antenna direction, and the long side of the scanning range is aligned with the target by presetting a scanning unit to find the target first and then adjusting the array antenna direction for formal scanning because the accurate scanning range of the orthogonal antenna deviates from ellipse, thereby improving the stay time of the target in the scanning range and improving the scanning effect.
In addition, the embodiment of the invention also provides an electronic device, which comprises a bus, a transceiver, a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the transceiver, the memory and the processor are respectively connected through the bus, and when the computer program is executed by the processor, the processes of the above-mentioned embodiment of the orthogonal hybrid beam forming method are realized, and the same technical effects can be achieved, so that repetition is avoided and repeated description is omitted.
In addition, the embodiment of the present invention further provides a computer readable storage medium, on which a computer program is stored, where the computer program when executed by a processor implements each process of the above-mentioned embodiment of the orthogonal hybrid beamforming method, and the same technical effects can be achieved, and for avoiding repetition, a detailed description is omitted herein.
Computer-readable storage media include both permanent and non-permanent, removable and non-removable media, and are tangible devices that retain and store instructions for use by an instruction execution device. Computer readable storage media includes electronic storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, and any suitable combination of the foregoing. Computer-readable storage media include phase-change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), non-volatile random access memory (NVRAM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassette storage, magnetic tape disk storage or other magnetic storage devices, memory sticks, mechanical coding (e.g., punch cards or bump structures in grooves with instructions recorded thereon), or any other non-transmission medium that can be used to store information that can be accessed by a computing device. In accordance with the definition in the present embodiments, the computer-readable storage medium does not include a transitory signal itself, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a pulse of light passing through a fiber optic cable), or an electrical signal transmitted through a wire.
In the several embodiments provided by the present application, it should be understood that the disclosed apparatus, electronic device, and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices, or elements, or may be an electrical, mechanical, or other form of connection.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one position, or may be distributed over a plurality of network units. Some or all of the units can be selected according to actual needs to solve the problem to be solved by the scheme of the embodiment of the invention.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the embodiments of the present invention is essentially or partly contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (including: a personal computer, a server, a data center or other network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the storage medium includes various media as exemplified above that can store program codes.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art can easily think about variations or alternatives within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.