CN107231185B - Machine-ground wireless communication device and method based on ADS-B signals - Google Patents
Machine-ground wireless communication device and method based on ADS-B signalsDownload PDFInfo
- Publication number
- CN107231185B CN107231185BCN201710419852.8ACN201710419852ACN107231185BCN 107231185 BCN107231185 BCN 107231185BCN 201710419852 ACN201710419852 ACN 201710419852ACN 107231185 BCN107231185 BCN 107231185B
- Authority
- CN
- China
- Prior art keywords
- antenna
- aircraft
- ads
- module
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004891communicationMethods0.000titleclaimsabstractdescription71
- 238000000034methodMethods0.000titleclaimsabstractdescription14
- 238000003491arrayMethods0.000claimsabstractdescription26
- 238000004364calculation methodMethods0.000claimsabstractdescription12
- 230000005540biological transmissionEffects0.000claimsabstractdescription8
- 230000000694effectsEffects0.000claimsabstractdescription6
- 230000033001locomotionEffects0.000claimsabstract2
- 238000004458analytical methodMethods0.000claimsdescription12
- 238000006243chemical reactionMethods0.000claimsdescription11
- 238000012545processingMethods0.000claimsdescription11
- 230000010006flightEffects0.000claimsdescription6
- 230000008520organizationEffects0.000claimsdescription4
- 238000010586diagramMethods0.000description9
- 238000005516engineering processMethods0.000description4
- 230000001419dependent effectEffects0.000description2
- 238000012544monitoring processMethods0.000description2
- 230000008859changeEffects0.000description1
- 230000009194climbingEffects0.000description1
- 238000010276constructionMethods0.000description1
- 230000007547defectEffects0.000description1
- 238000005265energy consumptionMethods0.000description1
- 230000003993interactionEffects0.000description1
- 238000007726management methodMethods0.000description1
- 238000012986modificationMethods0.000description1
- 230000004048modificationEffects0.000description1
- 230000008569processEffects0.000description1
- 238000004148unit processMethods0.000description1
Images
Classifications
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
- H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/543—Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明涉及无线通信领域，具体是一种基于ADS-B信号的机地无线通信装置与方法。The present invention relates to the field of wireless communication, in particular to a device and method for machine-ground wireless communication based on ADS-B signals.
背景技术Background technique
ADS-B(Automatic Dependent Surveillance-Broadcast)即广播式自动相关监视系统，依赖精确的全球卫星导航定位，全天候运行，监视(获取)飞机的位置、高度、速度、航向和识别号等信息，实现飞机之间，以及飞机与地面站间互相广播各自的信息数据。无需人工操作或者询问，便可以自动地从相关机载设备获取参数向其他飞机或地面站广播飞机的信息，以供管制员对飞机的状态进行监控。鉴于ADS-B的种种优势，目前，世界范围内都在积极推进ADS-B系统的建设。ADS-B (Automatic Dependent Surveillance-Broadcast) is a broadcast automatic dependent surveillance system, relying on accurate global satellite navigation and positioning, all-weather operation, monitoring (acquiring) the aircraft's position, altitude, speed, heading and identification number and other information to realize the realization of the aircraft. Between them, and between the aircraft and the ground station, broadcast their respective information data to each other. Without manual operation or inquiry, parameters can be automatically obtained from relevant airborne equipment to broadcast aircraft information to other aircraft or ground stations, so that controllers can monitor the status of the aircraft. In view of the advantages of ADS-B, at present, the construction of ADS-B system is actively promoted worldwide.
装备了ADS-B的飞机可通过数据链广播其自身的精确位置和其它数据(如速度、高度及飞机是否转弯、爬升或下降等)。ADS-B接收机与空管系统、其它飞机的机载ADS-B结合起来，在空地都能提供精确、实时的冲突信息。这一技术广泛应用于当今空中交通管制中的通信、导航和监视。Aircraft equipped with ADS-B can broadcast their precise position and other data (such as speed, altitude and whether the aircraft is turning, climbing or descending) via the data link. The ADS-B receiver combines with the air traffic control system and other aircraft's on-board ADS-B to provide accurate, real-time conflict information in the air and on the ground. This technology is widely used in communications, navigation and surveillance in air traffic control today.
现有技术中所使用的ADS-B信号通信系统存在很多问题，主要表现在：用户与运营商约定的飞行航迹越多、信息要素越多、重复报告周期越短，支付的信息服务费就越高，而且按照SITA格式电报计量的通信费用特别昂贵。一方面，虽然在低密度航路上，基于ADS-B的监视技术的空中交通服务和航空公司运行管理都能够实现，但高额的运行成本却让空管和航空公司等用户望而却步。因此，已经在航空器上配置的先进的机载设备、配套建设的空-空数据链、地-空数据链和地面用户设备，也只能束之高阁。另一方面，在高密度航路上，基于ADS-B的监视技术更是难上加难；并且在同一区域有多种不同无线信号覆盖的情况，天线间的相互干扰较强，严重影响服务质量。The ADS-B signal communication system used in the prior art has many problems, which are mainly manifested in: the more flight tracks, the more information elements, and the shorter the repeated reporting period between the user and the operator, the more information service fees paid for. The higher, and the communication cost according to the SITA format telegram is particularly expensive. On the one hand, although air traffic services and airline operation management based on ADS-B surveillance technology can be achieved on low-density routes, the high operating costs discourage users such as air traffic controllers and airlines. Therefore, the advanced airborne equipment, supporting air-air data link, ground-air data link and ground user equipment already deployed on the aircraft can only be shelved. On the other hand, on high-density routes, the monitoring technology based on ADS-B is even more difficult; and there are many different wireless signal coverage in the same area, the mutual interference between antennas is strong, which seriously affects the quality of service .
根据以上情况，亟需一种成本更低、容量更高、更低干扰的ADS-B通信系统以解决上述问题。According to the above situation, an ADS-B communication system with lower cost, higher capacity and lower interference is urgently needed to solve the above problems.
发明内容SUMMARY OF THE INVENTION
本发明针对目前机地无线通信系统成本高、容量低和抗干扰能力差等问题，为了实现对飞行器的定位追踪，并提供方便灵活、低能耗和低干扰的机地间的无线通信服务功能，提供了一种基于ADS-B信号的机地无线通信装置与方法；Aiming at the problems of high cost, low capacity and poor anti-interference capability of the current aircraft-ground wireless communication system, the present invention realizes the positioning and tracking of the aircraft and provides a convenient, flexible, low-energy-consumption and low-interference wireless communication service function between the aircraft and the ground. Provided are a machine-ground wireless communication device and method based on ADS-B signals;
所述的装置包括：接收解码模块，控制模块和天线模块；控制模块同时连接接收解码模块和天线模块；The device includes: a receiving and decoding module, a control module and an antenna module; the control module is simultaneously connected to the receiving and decoding module and the antenna module;
接收解码模块用于接收飞行器发出的ADS-B信号，并进行解码以获取飞行器的可读信息发送给控制模块；控制模块对可读信息进行分析，生成控制信息用于控制天线模块；天线模块设置有多个天线阵列，根据控制信息智能切换天线阵列以及天线阵列中相应的天线，为飞行器提供多个天线波束的无线通信服务。The receiving and decoding module is used to receive the ADS-B signal sent by the aircraft, and decode to obtain the readable information of the aircraft and send it to the control module; the control module analyzes the readable information, and generates control information for controlling the antenna module; the antenna module is set There are multiple antenna arrays, and the antenna arrays and the corresponding antennas in the antenna arrays are intelligently switched according to the control information to provide the aircraft with wireless communication services of multiple antenna beams.
接收解码模块包括：接收单元，A/D转换单元和解码单元；The receiving and decoding module includes: a receiving unit, an A/D conversion unit and a decoding unit;
接收单元带有外接天线，用于接收飞行器发出的ADS-B模拟信号，并传输给A/D转换单元转换为16进制数字信号后；解码单元对数字信号按照ADS-B信号的报文格式进行解析，以获取飞行器的可读信息。The receiving unit has an external antenna, which is used to receive the ADS-B analog signal sent by the aircraft, and transmit it to the A/D conversion unit to convert it into a hexadecimal digital signal; the decoding unit processes the digital signal according to the message format of the ADS-B signal. Parse to get readable information about the aircraft.
控制模块包括分析单元，频移计算单元，频率补偿单元和优先级处理单元；The control module includes an analysis unit, a frequency shift calculation unit, a frequency compensation unit and a priority processing unit;
分析单元根据飞行器的可读信息生成控制信息，控制信息包括第一天线选择信息和第二天线选择信息；The analysis unit generates control information according to the readable information of the aircraft, and the control information includes first antenna selection information and second antenna selection information;
第一天线选择信息根据飞行器的飞行高度和经纬度，选定一个或多个天线阵列作为特定天线阵列，使该特定天线阵列发出的波束分别指向飞行器的位置。第二天线选择信息根据飞行器的飞行状态，选择开启特定天线阵列中的相应天线。The first antenna selection information selects one or more antenna arrays as a specific antenna array according to the flying altitude and latitude and longitude of the aircraft, so that the beams emitted by the specific antenna array are directed to the position of the aircraft respectively. The second antenna selection information selects and turns on the corresponding antenna in the specific antenna array according to the flight state of the aircraft.
频移计算单元根据飞行器的位置、飞行速度、飞行高度以及天线的发射波长计算多普勒效应产生的频率移动；The frequency shift calculation unit calculates the frequency shift caused by the Doppler effect according to the position of the aircraft, the flight speed, the flight height and the emission wavelength of the antenna;
频率补偿单元根据频率移动对天线发射信号的频率进行适时补偿。The frequency compensation unit timely compensates the frequency of the signal transmitted by the antenna according to the frequency shift.
优先级处理单元根据通信服务范围内的所有航班路线信息，对所有飞行器进行等级划分，根据飞行器所处的不同等级，控制天线模块提供不同级别的无线通信服务。The priority processing unit classifies all aircraft according to all flight route information within the communication service range, and controls the antenna module to provide different levels of wireless communication services according to the different grades of the aircraft.
一种基于ADS-B信号的机地无线通信方法，包括以下步骤：A machine-ground wireless communication method based on ADS-B signal, comprising the following steps:
步骤一、针对某通信范围内的所有飞行器，接收单元接收每个飞行器发出的ADS-B模拟信号，并将接模拟信号发送至A/D转换单元。Step 1: For all aircraft within a certain communication range, the receiving unit receives the ADS-B analog signal sent by each aircraft, and sends the analog signal to the A/D conversion unit.
步骤二、A/D转换单元将ADS-B模拟信号转换为16进制数字信号，再发送至解码单元。Step 2: The A/D conversion unit converts the ADS-B analog signal into a hexadecimal digital signal, and then sends it to the decoding unit.
步骤三、解码单元对数字信号按照ADS-B信号的报文格式解析，得到每个飞行器的可读信息。Step 3: The decoding unit parses the digital signal according to the message format of the ADS-B signal to obtain the readable information of each aircraft.
可读信息包括：ICAO(国际民航组织)、Flight(航班号)、航班路线、位置、Altitude(飞行高度)、Speed(飞行速度)、Longitude&Latitude(经纬度)等等。The readable information includes: ICAO (International Civil Aviation Organization), Flight (flight number), flight route, location, Altitude (flight altitude), Speed (flight speed), Longitude&Latitude (latitude and longitude) and so on.
步骤四、分析单元根据飞行器的可读信息，从天线模块中为每个飞行器选定一个或多个天线阵列作为特定天线阵列，并开启特定天线阵列中的相应天线；Step 4: The analysis unit selects one or more antenna arrays for each aircraft from the antenna module as the specific antenna array according to the readable information of the aircraft, and turns on the corresponding antenna in the specific antenna array;
开启特定天线阵列中的相应天线，使该特定天线阵列发出的波束集中指向该飞行器的位置。Turn on the corresponding antenna in a specific antenna array, so that the beam emitted by the specific antenna array is directed to the position of the aircraft.
步骤五、针对某个选定天线，优先级处理单元将该天线覆盖范围内的所有飞行器划分为不同等级；
控制模块对服务范围内的所有飞机依据解析出的航班信息，对航班所需的通信服务进行等级划分，对有高质量服务需求的飞机提供优先优质通信服务。The control module classifies the communication services required by the flight according to the flight information parsed for all aircraft within the service range, and provides priority and high-quality communication services to aircraft with high-quality service needs.
步骤六、天线模块按照优先等级从高到低的顺序为飞行器提供多波束天线的无线通信服务。Step 6: The antenna module provides wireless communication services of multi-beam antennas for the aircraft in descending order of priority.
步骤七、频移计算单元根据选定的天线，结合飞行器的位置和高度，计算每个飞行器的移动频率fd；Step 7, the frequency shift calculation unit calculates the moving frequencyfd of each aircraft according to the selected antenna, in conjunction with the position and height of the aircraft;
计算如下：The calculation is as follows:
v为解析ads-b信号获得的飞行器的飞行速度，λ为特定天线阵列中的天线发射波长，cosθ由飞行器的位置及高度信号计算得出。v is the flight speed of the aircraft obtained by analyzing the ads-b signal, λ is the antenna emission wavelength in a specific antenna array, and cosθ is calculated from the position and altitude signals of the aircraft.
步骤八、根据频率移动fd，频率补偿单元对选定天线的发射信号的频率进行适时补偿。Step 8: According to the frequency shift fd , the frequency compensation unit performs timely compensation on the frequency of the transmission signal of the selected antenna.
本发明的优点在于：The advantages of the present invention are:
1)、一种基于ADS-B信号的机地无线通信装置，通过设置包含多个天线阵列的天线模块，并对多个天线阵列进行智能切换，改变了原有的天线平行发射的信号覆盖形式，变为由下而上对空发射的信号覆盖；同样的信号覆盖范围下，天线扇区更小，从而降低了天线的发射能量。1) A machine-to-ground wireless communication device based on ADS-B signals, by setting an antenna module containing multiple antenna arrays, and intelligently switching multiple antenna arrays, the original signal coverage form of parallel transmission of antennas has been changed , it becomes the signal coverage transmitted from the bottom to the top; under the same signal coverage, the antenna sector is smaller, thereby reducing the transmit energy of the antenna.
2)、一种基于ADS-B信号的机地无线通信方法，根据飞行器的位置选择打开相应位置的天线，消除了以往同一区域可能有多种不同无线信号覆盖的情况，降低了天线间的相互干扰，提高了服务质量。2) An air-to-ground wireless communication method based on ADS-B signals, which selects and opens the antenna at the corresponding position according to the position of the aircraft, which eliminates the previous situation that the same area may be covered by a variety of different wireless signals, and reduces the interaction between the antennas. interference and improve the quality of service.
附图说明Description of drawings
图1是根据本发明基于ADS-B信号的机地无线通信装置的结构示意图；1 is a schematic structural diagram of a machine-ground wireless communication device based on an ADS-B signal according to the present invention;
图2是本发明基于ADS-B信号的机地无线通信装置向飞机提供通信服务的示意图；Fig. 2 is the schematic diagram that the present invention provides the communication service to the aircraft based on the ADS-B signal-based wireless communication device of the aircraft;
图3是本发明基于ADS-B信号的机地无线通信装置中接收解码模块的结构示意图；3 is a schematic structural diagram of a receiving and decoding module in a machine-ground wireless communication device based on ADS-B signals of the present invention;
图4是本发明实施例中对ADS-B信号进行解码得到的飞机的可读信息的示意图。FIG. 4 is a schematic diagram of readable information of an aircraft obtained by decoding an ADS-B signal in an embodiment of the present invention.
图5是本发明基于ADS-B信号的机地无线通信装置中控制模块的结构示意图；5 is a schematic structural diagram of a control module in the machine-ground wireless communication device based on the ADS-B signal of the present invention;
图6是现有技术中多根定向天线可以提供的理想覆盖范围的示意图；6 is a schematic diagram of the ideal coverage that can be provided by multiple directional antennas in the prior art;
图7是本发明由飞机位置信息开启对应的天线波束的示意图；7 is a schematic diagram of the present invention opening a corresponding antenna beam by aircraft position information;
图8是本发明计算多普勒效应产生的频率移动的示意图；Fig. 8 is the schematic diagram of the frequency shift that the present invention calculates Doppler effect to produce;
图9是本发明基于ADS-B信号的机地无线通信方法的流程示意图。FIG. 9 is a schematic flow chart of a method for machine-ground wireless communication based on an ADS-B signal according to the present invention.
具体实施例specific embodiment
下面结合附图对本发明的具体实施方法进行详细说明。The specific implementation method of the present invention will be described in detail below with reference to the accompanying drawings.
本发明一种基于ADS-B信号的机地无线通信装置，用于实现对飞行器的定位跟踪，提供无线通信服务；可以应用到现在的空中交通管制、地面与飞行器的无线通信以及机场中对民航飞机提供无线网络服务等方面。The present invention is an aircraft-ground wireless communication device based on ADS-B signals, which is used to realize positioning and tracking of aircraft and provide wireless communication services; it can be applied to current air traffic control, wireless communication between ground and aircraft, and civil aviation in airports. The aircraft provides wireless network services and so on.
在该机地无线通信装置进行通信的飞机上安装有相应的机载设备，包括ATC(空中交通管制)应答机、MMR接收机、ADIRU计算机、TCAS(空中防撞系统)计算机和数据链系统。其中，Corresponding on-board equipment is installed on the aircraft in which the wireless communication device of the aircraft communicates, including ATC (air traffic control) transponder, MMR receiver, ADIRU computer, TCAS (air collision avoidance system) computer and data link system. in,
(1)ATC(空中交通管制)应答机：它是ADS-B系统的核心，负责收集和处理有关参数，由ATC天线通过数据链向地面站和其他飞机广播。(1) ATC (air traffic control) transponder: It is the core of the ADS-B system and is responsible for collecting and processing relevant parameters, which are broadcast by the ATC antenna to the ground station and other aircraft through the data link.
(2)MMR接收机：用来根据导航卫星计算精确的飞机位置和速度信息，传送给ATC应答机。(2) MMR receiver: It is used to calculate accurate aircraft position and speed information according to the navigation satellite, and transmit it to the ATC transponder.
(3)ADIRU计算机：向应答机提供飞机的气压高度等大气数据信息。(3) ADIRU computer: Provides air data information such as the air pressure and altitude of the aircraft to the transponder.
(4)TCAS(空中防撞系统)计算机：针对使用ADS-B IN功能的飞机上，TCAS计算机用于接收1090MHZ扩展电文的数据链，将地面站或者其他OUT的信号显示在驾驶舱内。(4) TCAS (Air Collision Avoidance System) computer: For the aircraft using the ADS-B IN function, the TCAS computer is used to receive the data link of the 1090MHZ extended message, and display the signal of the ground station or other OUT in the cockpit.
(5)数据链系统：ADS-B的OUT和IN功能都是基于数据链通信技术，目前应用最广泛的也是国际民航组织推荐的是基于SSR的S模式扩展电文(ES)功能的1090MHz频率。因该频段为TCAS工作频段，因而相对拥挤，目前正在发展其他的数据链包括UAT、VDL Mode4。(5) Data link system: The OUT and IN functions of ADS-B are based on data link communication technology. Currently, the most widely used frequency is the 1090MHz frequency of the SSR-based extended message (ES) function, which is recommended by the International Civil Aviation Organization. Because this frequency band is the working frequency band of TCAS, it is relatively crowded. Currently, other data links are being developed, including UAT and VDL Mode4.
本发明实施例的机地无线通信装置如图1所示，具体包括三个模块：接收解码模块11、控制模块12和天线阵列模块13，控制模块12同时连接接收解码模块11和天线模块13；The machine-ground wireless communication device according to the embodiment of the present invention is shown in FIG. 1, and specifically includes three modules: a receiving and decoding module 11, a control module 12, and an antenna array module 13, and the control module 12 is simultaneously connected to the receiving and decoding module 11 and the antenna module 13;
机地无线通信装置向飞机提供通信服务的示意图，如图2所示，飞机通过全球卫星导航系统、惯性导航系统、惯性参考系统、飞行管理器或其他机载传感器获取与飞行有关的参数，这些参数包括飞机的4维位置信息(经度、纬度、高度和时间)和其它可能附加信息(冲突告警信息，飞行员输入信息，航迹角，航线拐点等信息)以及飞机的识别信息和类别信息。此外，还可能包括一些别的附加信息，如航向、空速、风速、风向和飞机外界温度等，飞机将上述参数以ADS-B信号的形式发出，基于ADS-B信号的机地无线通信装置利用接收解码模块11接收飞行器(飞机)发出的ADS-B信号，并进行解码以获取飞行器的可读信息发送给控制模块12；A schematic diagram of the aircraft-ground wireless communication device providing communication services to the aircraft, as shown in Figure 2, the aircraft obtains flight-related parameters through the global satellite navigation system, inertial navigation system, inertial reference system, flight manager or other onboard sensors. The parameters include the 4-dimensional position information of the aircraft (longitude, latitude, altitude and time) and other possible additional information (conflict warning information, pilot input information, track angle, route turning point, etc.), as well as the identification information and category information of the aircraft. In addition, it may also include some other additional information, such as heading, airspeed, wind speed, wind direction and the outside temperature of the aircraft, etc. The aircraft sends the above parameters in the form of ADS-B signals, and the aircraft-ground wireless communication device based on ADS-B signals Utilize the receiving and decoding module 11 to receive the ADS-B signal sent by the aircraft (aircraft), and decode to obtain the readable information of the aircraft and send it to the control module 12;
控制模块12对可读信息进行分析，生成控制信息用于控制天线模块13；The control module 12 analyzes the readable information, and generates control information for controlling the antenna module 13;
天线模块13设置有多个天线阵列，根据控制信息智能切换天线阵列以及天线阵列中相应的天线，为飞行器提供多个天线波束的无线通信服务。The antenna module 13 is provided with multiple antenna arrays, and intelligently switches the antenna arrays and the corresponding antennas in the antenna arrays according to the control information, so as to provide the aircraft with wireless communication services of multiple antenna beams.
进一步，如图3所示，接收解码模块11包括：接收单元31，A/D转换单元32和解码单元33；Further, as shown in FIG. 3 , the receiving and decoding module 11 includes: a receiving unit 31, an A/D converting unit 32 and a decoding unit 33;
接收单元31一般为带有外接天线的硬件设备，用于接收空中(或是地面)飞行器发出的1090MHz的ADS-B模拟信号，并将接收到的模拟信号发送至A/D转换单元32。The receiving unit 31 is generally a hardware device with an external antenna, used to receive the 1090MHz ADS-B analog signal sent by the air (or ground) aircraft, and send the received analog signal to the A/D conversion unit 32 .
A/D转换单元32将ADS-B的模拟信号转换为16进制数字信号后，再将得到的数字信号发送至解码单元33。After the A/D conversion unit 32 converts the analog signal of the ADS-B into a hexadecimal digital signal, the obtained digital signal is sent to the decoding unit 33 .
解码单元33，对16进制数字信号按照ADS-B信号的报文格式进行解析，以获取飞行器的可读信息，并发送给控制模块12。The decoding unit 33 parses the hexadecimal digital signal according to the message format of the ADS-B signal to obtain readable information of the aircraft, and sends it to the control module 12 .
如图4所示，飞机的可读信息包括但不限于：ICAO(国际民航组织)、Flight(航班号)、航班路线信息、位置信息、Altitude(飞行高度)、Speed(飞行速度)、Longitude&Latitude(经纬度)等等。这些实地测得的可读信息还可以包括航班性质(国际/国内、机型、乘客数、网络需求质量高低等)。As shown in Figure 4, the readable information of the aircraft includes but is not limited to: ICAO (International Civil Aviation Organization), Flight (flight number), flight route information, location information, Altitude (flight altitude), Speed (flight speed), Longitude&Latitude ( latitude and longitude) and so on. These field-measured readable information can also include the nature of the flight (international/domestic, aircraft type, number of passengers, quality of network demand, etc.).
如图5所示，控制模块12包括分析单元51，频移计算单元52，频率补偿单元53和优先级处理单元54；As shown in FIG. 5 , the control module 12 includes an analysis unit 51, a frequency shift calculation unit 52, a frequency compensation unit 53 and a priority processing unit 54;
分析单元51根据飞行器的可读信息生成用于控制天线模块13的控制信息；The analysis unit 51 generates control information for controlling the antenna module 13 according to the readable information of the aircraft;
控制信息包括第一天线选择信息和第二天线选择信息；The control information includes first antenna selection information and second antenna selection information;
第一天线选择信息根据飞行器的飞行高度和经纬度，选定一个或多个天线阵列作为特定天线阵列为飞机提供无线通信服务，使该特定天线阵列发出的波束分别指向飞行器的位置。The first antenna selection information selects one or more antenna arrays as a specific antenna array to provide wireless communication services for the aircraft according to the flight altitude and latitude and longitude of the aircraft, so that the beams emitted by the specific antenna array are directed to the position of the aircraft respectively.
分析单元51根据可读信息中的飞机的高度、经纬度信息，对天线模块13中的各组天线阵列进行计算和评估，选择开启优选天线阵列，使天线阵列发出的波束指向飞机位置，为飞机提供无线通信服务。其中，该优选天线阵列可以为离飞机最近或覆盖范围最广等。The analysis unit 51 calculates and evaluates each group of antenna arrays in the antenna module 13 according to the altitude, longitude and latitude information of the aircraft in the readable information, selects to open the preferred antenna array, and makes the beam sent by the antenna array point to the position of the aircraft to provide the aircraft with Wireless communication services. The preferred antenna array may be the closest to the aircraft or the widest coverage.
第二天线选择信息根据飞行器飞行的状态，选择开启特定天线阵列中的最优相应天线，实现天线的智能切换。The second antenna selection information selects and turns on the optimal corresponding antenna in the specific antenna array according to the flying state of the aircraft, so as to realize the intelligent switching of the antenna.
当飞机进入一组优选的天线阵列的覆盖区域时，分析单元51根据飞机的高度、经纬度信息，将优选的天线阵列中的各个天线进行实时排序，实时选择开启离飞机最近的天线为飞机提供通信服务，与此同时关闭优选天线阵列中的其他天线。When the aircraft enters the coverage area of a group of preferred antenna arrays, the analysis unit 51 sorts the antennas in the preferred antenna array in real time according to the altitude, longitude and latitude information of the aircraft, and selects and activates the antenna closest to the aircraft in real time to provide communication for the aircraft service, while turning off the other antennas in the preferred antenna array.
频移计算单元52根据飞行器的位置、飞行速度、飞行高度以及天线的发射波长计算多普勒效应产生的频率移动；The frequency shift calculation unit 52 calculates the frequency shift caused by the Doppler effect according to the position of the aircraft, the flight speed, the flight height and the emission wavelength of the antenna;
频率补偿单元53根据频率移动对天线发射信号的频率进行适时补偿。The frequency compensation unit 53 timely compensates the frequency of the signal transmitted by the antenna according to the frequency shift.
优先级处理单元54根据通信服务范围内的所有航班路线信息，对所有飞行器进行等级划分，根据飞行器所处的不同等级，控制天线模块13提供不同级别的无线通信服务。The priority processing unit 54 classifies all the aircraft according to all flight route information within the communication service range, and controls the antenna module 13 to provide different levels of wireless communication services according to the different classes of the aircraft.
所述不同级别的无线通信服务，包括通信的优先级，对无线通信服务需求优先级高的优先提供服务；通信网络信号质量优先，对无线通信网络质量要求高的，优先提供无线网络服务。The wireless communication services of different levels, including the priority of communication, are given priority to those with higher requirements for wireless communication services; the signal quality of the communication network is given priority, and those with higher requirements of wireless communication network quality are given priority to provide wireless network services.
天线模块13由多个天线阵列组成；现有技术中多根定向天线可以提供的理想覆盖范围，如图6所示，目前使用较多的是多根双波束天线实现理想覆盖范围的方法。这种双波束天线可产生中心间隔角度为60度的两束相互独立的38度波束。这种双波瓣方式虽然可提供理想的覆盖范围，以及只需3个天线便可取代6根独立的单波束天线，但是和本发明相比，依旧有着极大的缺陷，具体表现在，天线扇区太大，导致天线发射能量较高，而且同一区域可能有多种不同无线信号覆盖的情况，增加了天线间的相互干扰。The antenna module 13 is composed of multiple antenna arrays; the ideal coverage provided by multiple directional antennas in the prior art is shown in FIG. This dual-beam antenna produces two independent 38-degree beams spaced 60 degrees apart from each other. Although this dual-lobe method can provide ideal coverage and only need 3 antennas to replace 6 independent single-beam antennas, it still has great defects compared with the present invention. The sector is too large, resulting in high transmit energy of the antenna, and the same area may be covered by a variety of different wireless signals, which increases the mutual interference between the antennas.
对比图6中传统定向天线的信号覆盖形式，本发明实施例中的多个天线阵列改变了原有的天线平行发射的信号覆盖形式，变为由下而上对空发射的信号覆盖。同样的信号覆盖范围下，天线扇区更小，从而降低了天线的发射能量；根据飞机的位置选择打开相应位置的天线，从而消除了以往同一区域可能有多种不同无线信号覆盖的情况，降低了天线间的相互干扰，提高服务质量。Compared with the signal coverage form of the traditional directional antenna in FIG. 6 , the multiple antenna arrays in the embodiment of the present invention change the signal coverage form of the original parallel transmission of the antennas to the signal coverage transmitted from the bottom to the top. Under the same signal coverage, the antenna sector is smaller, which reduces the transmission energy of the antenna; according to the position of the aircraft, the antenna at the corresponding position is selected to open, thereby eliminating the situation that there may be multiple different wireless signal coverage in the same area in the past. Mutual interference between antennas is avoided, and service quality is improved.
天线阵列依据控制模块12发出的控制信息，开启或关闭天线阵列中的部分天线，使得整个天线波束指向特定的位置，为飞机提供无线通信服务；如图7所示，当飞机由最右飞行至最左侧的过程中，天线阵列依据分析单元51发出的控制信息，天线阵列会依次分别开启1—6不同的信号覆盖范围，使得整个天线波束指向特定的位置，为飞机提供无线通信服务。The antenna array turns on or off part of the antennas in the antenna array according to the control information sent by the control module 12, so that the entire antenna beam points to a specific position to provide wireless communication services for the aircraft; as shown in Figure 7, when the aircraft flies from the far right to the In the process on the far left, according to the control information sent by the analysis unit 51, the antenna array will turn on 1-6 different signal coverage areas in turn, so that the entire antenna beam points to a specific position to provide wireless communication services for the aircraft.
一种基于ADS-B信号的机地无线通信方法，如图9所示，包括以下步骤：A machine-ground wireless communication method based on ADS-B signal, as shown in Figure 9, includes the following steps:
步骤一、针对某通信范围内的所有飞行器，接收单元接收每个飞行器发出的ADS-B模拟信号，并将接模拟信号发送至A/D转换单元。Step 1: For all aircraft within a certain communication range, the receiving unit receives the ADS-B analog signal sent by each aircraft, and sends the analog signal to the A/D conversion unit.
步骤二、A/D转换单元将ADS-B模拟信号转换为16进制数字信号，再发送至解码单元。Step 2: The A/D conversion unit converts the ADS-B analog signal into a hexadecimal digital signal, and then sends it to the decoding unit.
步骤三、解码单元对数字信号按照ADS-B信号的报文格式解析，得到每个飞行器的可读信息。Step 3: The decoding unit parses the digital signal according to the message format of the ADS-B signal to obtain the readable information of each aircraft.
步骤四、分析单元根据某飞行器的可读信息，从天线模块中为该飞行器选定一个或多个天线阵列作为特定天线阵列，并开启特定天线阵列中的相应天线；Step 4: The analysis unit selects one or more antenna arrays for the aircraft from the antenna module as a specific antenna array according to the readable information of a certain aircraft, and turns on the corresponding antenna in the specific antenna array;
开启特定天线阵列中的相应天线，使该特定天线阵列发出的波束集中指向该飞行器的位置。Turn on the corresponding antenna in a specific antenna array, so that the beam emitted by the specific antenna array is directed to the position of the aircraft.
步骤五、针对某个选定天线，优先级处理单元将该天线覆盖范围内的所有飞行器划分为不同等级；
优先级处理单元54根据服务范围内所有飞机的航班信息，对所有飞机进行等级划分，再控制天线模块13根据飞机所处的不同等级为其提供不同级别的无线通信服务。The priority processing unit 54 classifies all aircrafts according to the flight information of all aircrafts within the service range, and then controls the antenna module 13 to provide different levels of wireless communication services for the aircrafts according to their different classes.
不同级别的无线通信服务一方面包括通信的优先级，对无线通信服务需求优先级高的航班优先提供服务，另一方面，根据航班对无线通信网络质量要求高低，选择合理的无线网络为航班提供无线网络服务。On the one hand, different levels of wireless communication services include the priority of communication, and the flights with high wireless communication service requirements are given priority to provide services. Wireless network service.
具体的，在机场等飞机较多的场所，一方面，根据获取的航班信息(如航班号等)，以及根据获取的航班性质(国际国内、航班乘客人数)等对网络服务系统覆盖范围内的所有航班飞机进行划分建群。将划分好的群按照A、B、C、D的等级进行优先等级排序，优先为优先级较高的群提供无线网络通信服务；另一方面，根据获取的航班性质(网络需要质量高低)对网络服务系统覆盖范围内的所有航班飞机进行划分建群，将划分好的群按照1、2、3、4的等级进行优先等级排序，根据航班对无线通信网络质量要求高低，选择合理的无线网络为航班提供无线网络服务，航班对无线通信网络质量要求最高的，提供最优的无线网络为其服务，保证整个系统高效的服务质量(QOS)。Specifically, in airports and other places with many planes, on the one hand, according to the obtained flight information (such as flight number, etc.), and according to the obtained flight nature (international and domestic, the number of passengers on the flight), etc. All flight aircraft are divided into groups. The divided groups are prioritized according to the levels of A, B, C, and D, and priority is given to providing wireless network communication services for groups with higher priorities; All flights and aircraft within the coverage of the network service system are divided into groups, and the divided groups are prioritized according to the levels of 1, 2, 3, and 4, and a reasonable wireless network is selected according to the quality requirements of the flight on the wireless communication network. Provide wireless network services for flights. Flights have the highest requirements for wireless communication network quality, and provide optimal wireless network services to ensure the efficient quality of service (QOS) of the entire system.
步骤六、天线模块按照优先等级从高到低的顺序为飞行器提供多波束天线的无线通信服务。Step 6: The antenna module provides wireless communication services of multi-beam antennas for the aircraft in descending order of priority.
步骤七、频移计算单元根据选定的天线，结合飞行器的位置和高度，计算该飞行器的移动频率fd；Step 7, the frequency shift calculation unit calculates the moving frequency fd of the aircraft according to the selected antenna, in conjunction with the position and height of the aircraft;
如图8所示，S为飞行器的所在位置，x看作天线阵列位置，产生的频移公式如下：As shown in Figure 8, S is the position of the aircraft, and x is regarded as the position of the antenna array. The resulting frequency shift formula is as follows:
fd为多普勒效应产生的频移，v为解析ads-b信号获得的该飞行器的飞行速度，直接从飞机的可读信息中读取，同时从可读信息中提取飞机的位置以及飞机的高度信息；cosθ由该飞行器的位置及高度信号计算得出。λ为特定天线阵列中的天线发射的无线电波的波长。fd is the frequency shift caused by the Doppler effect, v is the flight speed of the aircraft obtained by analyzing the ads-b signal, which is directly read from the readable information of the aircraft, and the position of the aircraft and the aircraft are extracted from the readable information at the same time. The altitude information; cosθ is calculated from the position and altitude signal of the aircraft. λ is the wavelength of the radio waves emitted by the antennas in a particular antenna array.
步骤八、根据频率移动fd，频率补偿单元对选定天线的发射信号的频率进行适时补偿。Step 8: According to the frequency shift fd , the frequency compensation unit performs timely compensation on the frequency of the transmission signal of the selected antenna.
在控制天线发射无线电波时，利用频率补偿单元53控制适时地对天线发射无线电波的频率进行补偿。When the antenna is controlled to transmit radio waves, the frequency compensation unit 53 is used to control and compensate the frequency of the radio waves transmitted by the antenna in a timely manner.
本发明利用ads-b模块解码获取的飞行器位置信息(GPS：经纬度信息)，实现无线网络服务系统对飞行器的跟踪与定位。根据飞行器的位置信息(高度、经纬度)，由控制系统选择开启天线系统中的相应扇形天线，并指向飞机方向。同时，根据飞机飞行的状态，选择合适的无线网络热点为飞行器提供网络服务，实现系统中天线的智能切换。由获取到的飞机的飞行速度等数据，可以估算出无线信号的多普勒频移，并对天线发射功率做出补偿。在机场等飞机较多的场所，可以根据获取的航班信息(航班号等)，依据航班性质(国际国内、航班乘客人数、网络需要质量高低)等对网络服务系统覆盖范围内的所有航班飞机进行划分建群。对无线网络服务质量要求高的提供优先服务；保证整个系统高效的服务质量(QoS)。The present invention utilizes the aircraft position information (GPS: longitude and latitude information) obtained by decoding the ads-b module to realize the tracking and positioning of the aircraft by the wireless network service system. According to the position information (altitude, longitude and latitude) of the aircraft, the control system selects and turns on the corresponding sector antenna in the antenna system and points to the direction of the aircraft. At the same time, according to the flight status of the aircraft, a suitable wireless network hotspot is selected to provide network services for the aircraft, and the intelligent switching of the antennas in the system is realized. From the obtained data such as the flight speed of the aircraft, the Doppler frequency shift of the wireless signal can be estimated, and the antenna transmit power can be compensated. In airports and other places with many planes, all flights within the coverage of the network service system can be processed according to the obtained flight information (flight number, etc.) Divide into groups. Provide priority service for those with high requirements for wireless network service quality; ensure the efficient quality of service (QoS) of the entire system.
虽然本发明所揭露的实施方式如上，但所述的内容只是为了便于理解本发明而采用的实施方式，并非用以限定本发明。任何本发明所属技术领域内的技术人员，在不脱离本发明所揭露的精神和范围的前提下，可以在实施的形式上及细节上作任何的修改与变化，但本发明的专利保护范围，仍须以所附的权利要求书所界定的范围为准。Although the embodiments disclosed in the present invention are as above, the described contents are only the embodiments adopted to facilitate the understanding of the present invention, and are not intended to limit the present invention. Any person skilled in the art to which the present invention belongs, without departing from the spirit and scope disclosed by the present invention, can make any modifications and changes in the form and details of the implementation, but the scope of patent protection of the present invention, The scope as defined by the appended claims shall still prevail.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710419852.8ACN107231185B (en) | 2017-06-06 | 2017-06-06 | Machine-ground wireless communication device and method based on ADS-B signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710419852.8ACN107231185B (en) | 2017-06-06 | 2017-06-06 | Machine-ground wireless communication device and method based on ADS-B signals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107231185A CN107231185A (en) | 2017-10-03 |
| CN107231185Btrue CN107231185B (en) | 2020-06-02 |
Family
ID=59935883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710419852.8AActiveCN107231185B (en) | 2017-06-06 | 2017-06-06 | Machine-ground wireless communication device and method based on ADS-B signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107231185B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107959525B (en)* | 2017-11-22 | 2020-09-22 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Satellite-borne ACARS signal receiving and processing method |
| CN107943091B (en)* | 2017-12-25 | 2024-06-21 | 丰翼科技(深圳)有限公司 | Unmanned aerial vehicle avoidance method, control end, communication end, execution end and system |
| CN109005599A (en)* | 2018-09-14 | 2018-12-14 | 东南大学 | The communication method between the remote stand of the civil aviation airport and the airline control center |
| CN109411893B (en)* | 2018-10-09 | 2020-09-11 | 北京邮电大学 | Ultra-wideband and dual-band reconfigurable filtering antenna |
| CN110889220B (en)* | 2019-11-22 | 2023-03-17 | 北航（四川）西部国际创新港科技有限公司 | Novel ADS-B, TCAS antenna sharing method |
| CN111986522B (en)* | 2020-07-29 | 2022-03-22 | 广州市新航科技有限公司 | Airborne equipment positioning method based on ADS-B signal, airborne equipment and storage medium thereof |
| CN115473564B (en)* | 2022-08-01 | 2023-08-08 | 广州汽车集团股份有限公司 | Aircraft communication method and system, airborne wireless transceiver, aircraft |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003029922A2 (en)* | 2001-10-01 | 2003-04-10 | Kline & Walker, Llc | Pfn/trac system faa upgrades for accountable remote and robotics control |
| CN101176367A (en)* | 2005-05-18 | 2008-05-07 | 艾利森电话股份有限公司 | Arrangement, system, and method for communicating with aircraft through cellular base station towers |
| EP2323216A1 (en)* | 2009-11-12 | 2011-05-18 | Alcatel Lucent | Antenna apparatus and antenna selection method |
| CN102077490A (en)* | 2008-09-04 | 2011-05-25 | 阿尔卡特朗讯 | System and method for providing in-flight broadband mobile communication service |
| CN102625979A (en)* | 2009-05-05 | 2012-08-01 | 空中客车营运有限公司 | Method for directional digital data transmission between an aircraft and a ground station |
| CN103354979A (en)* | 2011-02-09 | 2013-10-16 | 高通股份有限公司 | High data rate aircraft to ground communication antenna system |
| CN104134373A (en)* | 2013-05-02 | 2014-11-05 | 波音公司 | Device, system and methods using angle of arrival measurements for ADS-B authentication and navigation |
| CN105006646A (en)* | 2015-07-08 | 2015-10-28 | 深圳市华信天线技术有限公司 | ADS-B portable device |
| CN106487439A (en)* | 2015-08-27 | 2017-03-08 | 波音公司 | Flight data recorders streaming FDRS solution |
- 2017
- 2017-06-06CNCN201710419852.8Apatent/CN107231185B/enactiveActive
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003029922A2 (en)* | 2001-10-01 | 2003-04-10 | Kline & Walker, Llc | Pfn/trac system faa upgrades for accountable remote and robotics control |
| CN101176367A (en)* | 2005-05-18 | 2008-05-07 | 艾利森电话股份有限公司 | Arrangement, system, and method for communicating with aircraft through cellular base station towers |
| CN102077490A (en)* | 2008-09-04 | 2011-05-25 | 阿尔卡特朗讯 | System and method for providing in-flight broadband mobile communication service |
| CN102625979A (en)* | 2009-05-05 | 2012-08-01 | 空中客车营运有限公司 | Method for directional digital data transmission between an aircraft and a ground station |
| EP2323216A1 (en)* | 2009-11-12 | 2011-05-18 | Alcatel Lucent | Antenna apparatus and antenna selection method |
| CN103354979A (en)* | 2011-02-09 | 2013-10-16 | 高通股份有限公司 | High data rate aircraft to ground communication antenna system |
| CN104134373A (en)* | 2013-05-02 | 2014-11-05 | 波音公司 | Device, system and methods using angle of arrival measurements for ADS-B authentication and navigation |
| CN105006646A (en)* | 2015-07-08 | 2015-10-28 | 深圳市华信天线技术有限公司 | ADS-B portable device |
| CN106487439A (en)* | 2015-08-27 | 2017-03-08 | 波音公司 | Flight data recorders streaming FDRS solution |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107231185A (en) | 2017-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107231185B (en) | Machine-ground wireless communication device and method based on ADS-B signals | |
| Tooley et al. | Aircraft communications and navigation systems | |
| US8004452B2 (en) | Methods and apparatus for coordinating ADS-B with mode S SSR and/or having single link communication | |
| US10911132B2 (en) | Low earth orbit satellite for air traffic control | |
| EP3330736B1 (en) | Data communication between airport surveillance radar and onboard airborne weather radar | |
| CN106527483A (en) | Unmanned plane active threat avoiding system based on air traffic control data link | |
| AU2012228397A1 (en) | Satellite communication network | |
| Lin et al. | An ADS-B like communication for UTM | |
| CN111508281A (en) | A method for classifying and guiding ADS-B targets by a spaceborne platform | |
| US8560028B1 (en) | Antenna functionality management router controlling the transmit-receive modes of multiple antennas | |
| Gillani et al. | A proposed communication, navigation & surveillance system architecture to support urban air traffic management | |
| US20180026707A1 (en) | System and method for re-broadcasting ads-b data | |
| Becker et al. | Toward robust and efficient communications for urban air mobility | |
| CN112217559A (en) | Branch unmanned aerial vehicle logistics operation and maintenance system | |
| Gustavsson | VDL Mode 4/STDMA-a CNS data link | |
| Duan et al. | ADS-B feasibility study for commercial space flight operations | |
| Naeem et al. | 5G-enabled architectural imperatives and guidance for urban air mobility: Enhancing communication, navigation, and surveillance | |
| CN214228250U (en) | Communication device and system for middle and low altitude aircraft | |
| Wang et al. | Empowering heterogeneous communication data links in general aviation through mmwave signals | |
| Pozesky et al. | The US air traffic control system architecture | |
| Marks et al. | Applications and challenges for airborne ad-hoc communication networks in ORP airspaces using the L-band | |
| CN208256103U (en) | A kind of navigation airport aided management system based on star base ADS-B | |
| CN115909821B (en) | A software defined aviation data link ADS-B message receiving and sending method based on software defined radio platform | |
| EP4572182A1 (en) | Aircraft datalink based on a terrestrial to leo satellite cellular transceiver and associated spectrum | |
| Zambrano | Spectrum and operational efficiency optimization using airborne communication network capacity modeling for cognitive radios |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |