Precise interference device and method for communication link of unmanned aerial vehicle

Abstract

The invention discloses an unmanned aerial vehicle communication link accurate interference device and method, and the device comprises a ground control station which is used for transmitting a first signal to an unmanned aerial vehicle and receiving a second signal transmitted by the unmanned aerial vehicle; and the unmanned aerial vehicle interference station is used for receiving and processing the first signal sent by the ground control station and the second signal sent by the unmanned aerial vehicle, and sending a third signal to the unmanned aerial vehicle. According to the invention, the characteristics of the flight control command signal emitted by the ground control station are determined by analyzing the downlink communication link, the spatial orientation characteristics of the unmanned aerial vehicle are determined by analyzing the uplink communication link, and finally the third signal, namely the interference signal, which can effectively interfere with the flight control command signal is emitted to the unmanned aerial vehicle. And accurate interference on the communication link of the unmanned aerial vehicle is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless communication, and particularly relates to a precise interference device and method for an unmanned aerial vehicle (UAV) communication link. Background Art

[0002] UAV technology is widely used in today's world. From small consumer UAVs to large freight UAVs, various types of UAVs have improved our production efficiency and quality of life. At the same time, the control and security issues of UAVs have attracted more and more attention, such as: illegal flight of UAVs in important no-fly zones, malicious attack behaviors of UAVs against specific targets, etc. In order to control various illegal and unreasonable behaviors of UAVs, corresponding countermeasures need to be studied. Relatively extreme countermeasures are physical attacks on UAVs, such as shooting with firearms and artillery; relatively mild countermeasures are interference with the electromagnetic signals on which UAVs rely for operation, such as interference with satellite navigation signals and communication signals. Interference with UAV satellite navigation signals may cause performance degradation or failure of legal and compliant navigation services in the area; interference with UAV communication signals only targets specific UAV communication frequency bands, and can minimize the impact on legal and compliant frequency users in the area. Therefore, studying UAV communication link interference technology is of great significance for the control of UAVs.

[0003] Existing interference devices for UAV communication links are mainly handheld UAV jamming guns, backpack-mounted and vehicle-mounted UAV jamming stations.

[0004] The main technical defects of existing UAV interference devices include:

[0005] First, information acquisition depends on external input, and the maneuverability is low. For some existing UAV jamming stations, the determination of the UAV working frequency band depends on an external spectrum analyzer, and the positioning of the UAV depends on an external radar or optoelectronic device, which increases the complexity of the system and reduces the maneuverability of the system.

[0006] Second, the accuracy of interference stations that do not depend on external input is relatively low. Some existing UAV jamming stations achieve the positioning function of UAVs by installing a multi-antenna system. Due to the limited number of antennas, the positioning accuracy is relatively low. For example, the accuracy of the traditional amplitude comparison direction finding method seriously depends on the number of antennas and the beam width; systems using advanced MUSIC algorithms or ESPRIT algorithms not only depend on the number of array antennas, but also have requirements for the prior information of signals and the non-coherent characteristic constraints of signals in different directions (the non-coherent characteristic constraints cause the algorithm to be unable to distinguish multipath signals of the same signal source).

[0007] Thirdly, precise interference cannot be achieved. After analyzing the signal working frequency band, the existing UAV jamming stations select the preset interference frequency band and turn on the interference signal emission function. The existing problems are as follows: 1. High-end UAVs may turn on the frequency hopping and time hopping functions after sensing the interference, resulting in the failure of interference; 2. Using the same interference waveform for different types of UAV communication signals will lead to a decrease in interference efficiency; 3. Whether the jammer uses omnidirectional signal emission or directional signal emission will result in signal power loss and thus a shortening of the interference distance.

[0008] Fourthly, the interference direction cannot be determined for high-end UAVs using the FDD (Frequency Division Duplex) working mode. UAVs using the FDD working mode have two working links: one is the downlink communication link, that is, the signal transmission from the ground control station to the UAV; the other is the uplink communication link, that is, the signal transmission from the UAV to the ground control station. The existing UAV jamming stations cannot distinguish the two links and usually adopt the method of simultaneous interference. Since the interference of the uplink is of little significance, half of the power is wasted as a result. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a precise interference device and method for a UAV communication link. By determining the characteristics of the flight control instruction signal transmitted by the ground control station through the downlink communication link (to the jamming station), and determining the spatial orientation information of the UAV through the uplink communication link (to the jamming station), and finally transmitting an interference signal that can effectively interfere with the flight control instruction signal to the UAV, precise interference of the UAV communication link is achieved.

[0010] To solve the above technical problems, in the first aspect of the embodiments of the present invention, a precise interference device for a UAV communication link is disclosed. The device includes:

[0011] A ground control station and a UAV jamming station;

[0012] The ground control station is used to send a first signal to the UAV and receive a second signal sent by the UAV;

[0013] The first signal represents a UAV control signal; the second signal represents a UAV status signal;

[0014] The UAV jamming station is used to receive and process the first signal sent by the ground control station and the second signal sent by the UAV, and send a third signal to the UAV;

[0015] The third signal represents a UAV interference signal.

[0016] As an optional implementation manner, in the first aspect of the embodiments of the present invention, the UAV jamming station includes: a jamming host and a jamming antenna;

[0017] The interference antenna is configured to receive the first signal and the second signal, and send them to the interference host, receive the third signal sent by the interference host, and send the third signal to the drone;

[0018] The interference host is configured to receive and process the first signal and the second signal, and send the third signal to the interference antenna.

[0019] As an optional implementation manner, in the first aspect of the embodiments of the present invention, the interference antenna includes: an antenna array surface and an antenna rod;

[0020] The antenna array surface is composed of N antenna elements, where N is a positive integer; it is configured to receive and process the first signal, the second signal, and send the third signal;

[0021] The antenna rod is configured to support the antenna array surface, send the received first signal and second signal to the interference host, and send the third signal to the drone.

[0022] A second aspect of the embodiments of the present invention discloses a method for precisely interfering with a drone communication link, which is applied to the drone communication link precise interference device disclosed in the first aspect of the embodiments of the present invention. The method includes:

[0023] S1. The drone interference station receives and processes the first signal and the second signal, and respectively obtains a first digital signal and a second digital signal;

[0024] S2. The drone interference station processes the first digital signal and the second digital signal, and respectively obtains first signal feature information and second signal feature information;

[0025] S3. Based on the first signal feature information and the second signal feature information, the drone interference station sends the third signal to the drone to precisely interfere with the drone;

[0026] The precise interference includes a first interference and a second interference.

[0027] As an optional implementation manner, in the second aspect of the embodiments of the present invention, the drone interference station receives and processes the first signal and the second signal, and respectively obtains a first digital signal and a second digital signal, including:

[0028] S11. Receive and acquire the first signal and the second signal;

[0029] S12. Perform filtering, low-noise amplification, down-conversion, and A / D conversion processing on the first signal to obtain a first digital signal;

[0030] S13, filter, low-noise amplify, down-convert, and perform A / D conversion on the second signal to obtain a second digital signal.

[0031] As an optional implementation, in the second aspect of the embodiments of the present invention, the drone jamming station processes the first digital signal and the second digital signal to obtain first signal feature information and second signal feature information respectively, including:

[0032] S21, process the first digital signal to obtain first signal feature information;

[0033] The first signal feature information includes first signal beam feature information, first signal direct beam feature information, first signal time feature information, and first signal frequency feature information;

[0034] S22, process the second digital signal to obtain second signal feature information;

[0035] The second signal feature information includes second signal elevation angle information and second signal direction angle information.

[0036] As an optional implementation, in the second aspect of the embodiments of the present invention, the processing of the first digital signal to obtain first signal feature information includes:

[0037] S211, use a beamforming model to process the first digital signal to obtain first signal beam feature information;

[0038] The expression of the beamforming model is:

[0039]

[0040] where i represents the row index of the antenna element in the antenna array plane; j represents the column index of the antenna element in the antenna array plane; D represents the downlink; p represents the row index of the spatial beam; q represents the column index of the spatial beam; t represents the processing time; represents the beamforming coefficient corresponding to the antenna element at the i-th row and j-th column of the antenna array; ɑ p represents the elevation angle of the p-th row and q-th column spatial beam formed by the antenna array; β q represents the direction angle of the p-th row and q-th column spatial beam formed by the antenna array; M represents the number of rows of the antenna array; N represents the number of columns of the antenna array; t represents the third signal output time; represents the angle between the projection of the radio wave propagation direction on the antenna array plane and the X-axis;

[0041] S212. Use the beam selection model to process the first signal beam feature information to obtain the first signal direct beam feature information;

[0042] The expression of the beam selection model is:

[0043]

[0044] where i represents the row index of the antenna element in the antenna array plane; j represents the column index of the antenna element in the antenna array plane; D represents the downlink; p represents the row index of the spatial beam; q represents the column index of the spatial beam; t represents the processing time; represents the optimal receiving beamforming coefficient of the antenna element at the i-th row and j-th column of the antenna array plane; represents the equivalent complex signal of the signal received by the antenna element at the i-th row and j-th column of the antenna array plane; c represents the speed of light; ∈ represents the free space fading constant; L BJ represents the distance between the ground control station and the interference station; k represents the free space fading exponent; is the receiving gain of the antenna element in the direction of the radio wave direct path angle between the ground control station and the UAV interference station; represents the included angle between the radio wave direct path from the ground control station to the UAV interference station and the Z-axis; represents the included angle between the radio wave direct path from the ground control station to the UAV interference station and the X-axis; z D (t, α p , β q , JH1) represents the output result of the first polarization direction at time t; z D (t, ɑ p , β q , JH2) represents the output result of the second polarization direction at time t; T1 represents the start time of the direct beam; T2 represents the end time of the direct beam signal;

[0045] S213. Use the time determination model to process the direct beam feature information to obtain the first signal time feature information;

[0046] The first signal time feature information includes the first signal transmission start time information and the first signal transmission end time information;

[0047] S214. Use the frequency determination model to process the direct beam feature information to obtain the first signal frequency feature information;

[0048] The first signal frequency feature information includes the first signal frequency lower limit information and the first signal frequency upper limit information.

[0049] As an alternative implementation, in the second aspect of the embodiments of the present invention, processing the direct beam feature information by using the time determination model to obtain the first signal time feature information includes:

[0050] S2131, performing a judgment process on the direct beam feature information by using the first time determination model to obtain a first judgment result value;

[0051] The expression of the first time determination model is:

[0052]

[0053] Wherein, represents a first threshold value; [T i , T i+1 represents a set time interval; T i+2 represents the judgment process time;

[0054] S2132, when the first judgment result value is yes, the time at T i+2 is the start time of the signal transmitted by the ground control station, and the first signal transmission start time information is obtained; otherwise, S2133 is executed;

[0055] S2133, performing a judgment process on the direct beam feature information by using the second time determination model to obtain a second judgment result value;

[0056] The expression of the second time determination model is:

[0057]

[0058] Wherein, represents a first threshold value; [T i , T i+1 represents a set time interval; T i+2 represents the judgment process time;

[0059] S2134, when the second judgment result value is yes, the time at T i+2 is the end time of the signal transmitted by the ground control station, and the first signal transmission end time information is obtained; otherwise, S211 is executed.

[0060] As an alternative implementation, in the second aspect of the embodiments of the present invention, processing the direct beam feature information by using the frequency determination model to obtain the first signal frequency feature information includes:

[0061] S2141, performing a judgment process on the direct beam feature information by using the first frequency determination model to obtain a third judgment result value;

[0062] The expression of the first frequency determination model is as follows:

[0063]

[0064] Wherein, represents the second threshold value; B represents the bandwidth of the receiving filter; f i represents the center frequency of the filter; T1 represents the start time of the signal frame; T2 represents the end time of the signal frame; [f i -B / 2, f i +B / 2] represents the set signal bandwidth; represents that the bandwidth range of the receiving filter is [f i -B / 2, f i +B / 2];

[0065] S2142, when the third judgment result value is yes, f i -B / 2 is the lower limit of the frequency band occupied by the signal transmitted by the ground control station, and the first signal frequency lower limit information is obtained; otherwise, S2143 is executed;

[0066] S2143, using the second frequency determination model to judge and process the direct beam feature information, and obtaining a fourth judgment result value;

[0067] The expression of the second time determination model is as follows:

[0068]

[0069] Wherein, represents the second threshold value; B represents the bandwidth of the receiving filter; f i represents the center frequency of the filter; T1 represents the start time of the signal frame; T2 represents the end time of the signal frame; [f i -B / 2, f i +B / 2] represents the set signal bandwidth; represents that the bandwidth range of the receiving filter is [f i -B / 2, f i +B / 2];

[0070] S2144, when the fourth judgment result value is yes, f i+1 +B / 2 is the upper limit of the frequency band occupied by the signal transmitted by the ground control station, and the first signal frequency upper limit information is obtained; otherwise, S211 is executed.

[0071] As an optional implementation manner, in the second aspect of the embodiments of the present invention, based on the first signal feature information and the second signal feature information, the drone jammer sends the third signal to the drone to perform precise jamming on the drone, including:

[0072] S31. Determine a first bandwidth based on the first signal feature information;

[0073] S32. Determine a second bandwidth based on the third signal;

[0074] S33. Align the third signal with the first signal in terms of time and frequency based on the first signal feature information;

[0075] Determine the elevation angle information and azimuth angle information of the third signal based on the second signal feature information;

[0076] S34. Determine whether the first bandwidth is less than the second bandwidth to obtain a signal bandwidth determination result;

[0077] S35. When the signal bandwidth determination result is yes, use the elevation angle information and azimuth angle information, and the UAV jamming station performs a first interference on the UAV;

[0078] When the signal bandwidth determination result is no, use the elevation angle information and azimuth angle information, and the UAV jamming station performs a second interference on the UAV.

[0079] The third aspect of the present invention discloses another UAV communication link precise interference device, and the device includes:

[0080] A memory storing executable program code;

[0081] A processor coupled to the memory;

[0082] The processor calls the executable program code stored in the memory and executes some or all of the steps in the UAV communication link precise interference method disclosed in the second aspect of the embodiments of the present invention.

[0083] The fourth aspect of the present invention discloses a computer-readable storage medium, and the computer-readable storage medium stores computer instructions, and when the computer instructions are called, some or all of the steps in the UAV communication link precise interference method disclosed in the second aspect of the embodiments of the present invention are executed.

[0084] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0085] In the embodiments of the present invention, by analyzing the downlink communication link, that is, the first signal, the flight control instruction signal features transmitted by the ground control station are determined, and the spatial orientation features of the UAV are determined through the uplink communication link, that is, the second signal. Finally, by transmitting a third signal, that is, an interference signal, that can effectively interfere with the flight control instruction signal to the UAV, precise interference of the UAV communication link is achieved. Description of the Drawings

[0086] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0087] Figure 1 is a schematic diagram of the scenario of the precise interference device for the UAV communication link provided by the embodiment of the present invention;

[0088] Figure 2 is a top view of the antenna array surface and a schematic diagram of the direction angle interval disclosed by the embodiment of the present invention;

[0089] Figure 3 is a schematic diagram of the composition of the antenna unit disclosed by the embodiment of the present invention;

[0090] Figure 4 A schematic flow diagram of a method for precisely interfering with the UAV communication link disclosed by the embodiment of the present invention;

[0091] Figure 5 is a schematic diagram of another precise interference device for the UAV communication link disclosed by the embodiment of the present invention. Detailed implementation manners

[0092] In order to enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0093] The terms "first", "second", etc. in the specification and claims of the present invention and the above accompanying drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product, or equipment that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or equipment.

[0094] References to "embodiments" in this specification mean that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the invention. The phrase occurs in various places in the specification and is not necessarily referring to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. Those skilled in the art will understand explicitly and implicitly that the embodiments described herein can be combined with other embodiments.

[0095] In this application, the term "exemplary" is used to mean "serving as an example, instance, or illustration". Any embodiment described as "exemplary" in this application is not necessarily to be construed as more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. In the following description, details are set forth for the purpose of explanation. It should be understood that those of ordinary skill in the art can recognize that this application can be implemented without these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid obscuring the description of this application with unnecessary details. Therefore, this application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

[0096] It should be noted that since the method of the embodiments of this application is executed in a computer device, the processing objects of each computer device exist in the form of data or information. For example, time, which is actually time information. It can be understood that in subsequent embodiments, if dimensions, quantities, positions, etc. are mentioned, they are all corresponding data existences for the computer device to process, and specific details are not elaborated here.

[0097] It should be noted that a brief description of the artificial intelligence-related technologies that may be involved in this application is provided. Artificial Intelligence (AI) is the theory, method, technology, and application system that uses digital computers or machines controlled by digital computers to simulate, extend, and expand human intelligence, perceive the environment, acquire knowledge, and use knowledge to obtain the best results. In other words, artificial intelligence is a comprehensive technology in computer science that attempts to understand the essence of intelligence and produce a new intelligent machine that can react in a way similar to human intelligence. Artificial intelligence also studies the design principles and implementation methods of various intelligent machines to enable the machines to have the functions of perception, reasoning, and decision-making.

[0098] Artificial intelligence technology is an interdisciplinary subject that involves a wide range of fields, including both hardware-level and software-level technologies. The basic technologies of artificial intelligence generally include technologies such as sensors, dedicated artificial intelligence chips, cloud computing, distributed storage, big data processing technology, operation / interaction systems, and mechatronics. The software technologies of artificial intelligence mainly include several major directions such as computer vision technology, speech processing technology, natural language processing technology, and machine learning / deep learning.

[0099] Computer Vision Technology (CV) Computer vision is a science that studies how to enable machines to "see". Further, it refers to using cameras and computers to replace human eyes for object recognition and measurement, etc., which is machine vision, and further performing graphics processing to make the computer-processed images more suitable for human eyes to observe or be transmitted to instruments for detection. As a scientific discipline, computer vision studies related theories and technologies and attempts to build artificial intelligence systems that can obtain information from images or multi-dimensional data. Computer vision technology usually includes technologies such as image processing, image recognition, image semantic understanding, image retrieval, OCR, video processing, video semantic understanding, video content / behavior recognition, 3D object reconstruction, 3D technology, virtual reality, augmented reality, simultaneous localization and mapping, etc., and also includes common biometric recognition technologies such as face recognition and fingerprint recognition.

[0100] Unimodal information is data of only one type, such as one of the data information of text, image, audio, video, electromagnetic signal, etc. Multimodal information is data information that includes at least two types of unimodal information. Further, multimodal information is applicable to complex tasks that require integrating multiple information sources, such as sentiment analysis, robot interaction, and autonomous driving. By integrating information of multiple modalities, higher performance and accuracy can usually be achieved in tasks.

[0101] A large model refers to an artificial neural network model with a very large number of parameters. In the field of artificial intelligence, a large model usually refers to a model with hundreds of millions to trillions of parameters. The model usually needs to be trained on a large-scale dataset and requires a large amount of computing resources for optimization and adjustment. Large models are usually used to solve complex natural language processing, computer vision, and speech recognition tasks. Generative AI is a type of AI that can create new content and ideas, including conversations, stories, images, videos, and music. In the embodiments of this application, the large model can be large language models such as ChatGPT, BERT, XLNet, Zhipu Model, Claude, Moonshot AI Model, ChatGLM Model, Qianyitongwen Model, MiniMax Model, Spark Model, Llama Model, 360GPT Model, Qwen Model, Baichuan Model, Lark Model, vivoLM Model, and Wenxin Yiyan, and the embodiments of this application do not make any limitations.

[0102] The embodiments of the present application provide a precise interference device, system, device, computer device and computer-readable storage medium for an unmanned aerial vehicle (UAV) communication link, which will be described in detail below.

[0103] Please refer to Figure 1 , Figure 1 which is a schematic diagram of the application scenario of the precise interference device for the UAV communication link provided by the embodiments of the present application. The system may include an interference host 100 as shown in Figure 1 . The interference host 100 integrates a model checking device for the precise interference method of the UAV communication link.

[0104] In the embodiments of the present application, the interference host 100 may be an independent server, or a server network or server cluster composed of servers. For example, the interference host 100 described in the embodiments of the present application includes, but is not limited to, a computer, a network host, a single network server, a set of multiple network servers, or a cloud server composed of multiple servers. Among them, the cloud server is composed of a large number of computers or network servers based on cloud computing.

[0105] It can be understood that the interference host 100 used in the embodiments of the present application may be a device that includes both receiving and transmitting hardware, that is, a device with receiving and transmitting hardware capable of performing two-way communication on a two-way communication link. Such a device may include: a cellular or other communication device, which has a single-line display or a multi-line display or a cellular or other communication device without a multi-line display. Specifically, the interference host 100 may be a desktop terminal or a mobile terminal, and the interference host 100 may specifically also be one of a mobile phone, a tablet computer, a laptop computer, etc.

[0106] Those skilled in the art can understand that Figure 1 the application environment shown in Figure 1 is only an application scenario of the solution of the present application, and does not constitute a limitation on the application scenario of the solution of the present application. Other application environments may also include more or fewer computer devices than those shown in Figure 1 . For example, only 1 computer device is shown in

[0107] The present invention discloses a precise interference device and apparatus for an unmanned aerial vehicle (UAV) communication link. By analyzing the downlink communication link, i.e., the first signal, the characteristics of the flight control command signal transmitted by the ground control station are determined. By analyzing the uplink communication link, i.e., the second signal, the spatial orientation characteristics of the UAV are determined. Finally, by transmitting a third signal, i.e., an interference signal, that can effectively interfere with the flight control command signal to the UAV, precise interference of the UAV communication link is achieved. The following will be described in detail respectively.

[0108] Embodiment 1

[0109] Please refer to Figure 1 , Figure 1 which is a schematic diagram of the composition of a precise interference device for a UAV communication link disclosed in an embodiment of the present invention. Among them, Figure 1 the described precise interference device for a UAV communication link is applied in a UAV control system, such as a local server or a cloud server for a UAV control system, etc., and the embodiments of the present invention do not make limitations. As Figure 1 shown, the precise interference device for a UAV communication link includes:

[0110] a ground control station and a UAV interference station;

[0111] The ground control station is configured to send a first signal to the UAV and receive a second signal sent by the UAV;

[0112] It should be noted that the first signal represents a UAV control signal; the second signal represents a UAV status signal;

[0113] It should be noted that the ground control station is configured to receive and process the UAV status signal sent by the UAV and send a UAV control signal to the UAV according to the UAV status signal, and the specific processing process is not limited in this embodiment;

[0114] The UAV interference station is configured to receive and process the first signal sent by the ground control station and the second signal sent by the UAV, and send a third signal to the UAV;

[0115] It should be noted that the third signal represents a UAV interference signal.

[0116] It can be seen that by implementing the precise interference device for a UAV communication link described in the embodiments of the present invention, the characteristics of the flight control command signal transmitted by the ground control station are determined by processing the downlink communication link, i.e., the first signal, the spatial orientation characteristics of the UAV are determined by processing the uplink communication link, i.e., the second signal, and finally, by transmitting a third signal, i.e., an interference signal, that can effectively interfere with the flight control command signal to the UAV, precise interference of the UAV communication link is achieved.

[0117] Optionally, asFigure 1 As shown, the UAV jamming station includes a jamming host 100 and a jamming antenna;

[0118] The jamming antenna is configured to receive the first signal sent by the ground control station and the second signal sent by the UAV, and send them to the jamming host, receive the third signal sent by the jamming host, and send the third signal to the UAV;

[0119] The jamming host 100 is configured to receive and process the first signal and the second signal received by the jamming antenna, and send the third signal to the jamming antenna.

[0120] It can be seen that by implementing the UAV jamming station described in the embodiments of the present invention, the downlink communication link, i.e., the first signal, is processed to determine the characteristics of the flight control command signal transmitted by the ground control station, the uplink communication link, i.e., the second signal, is processed to determine the spatial orientation characteristics of the UAV, and based on the characteristics of the flight control command signal and the spatial orientation characteristics of the UAV, a third signal capable of effectively interfering with the flight control command signal is transmitted to the UAV, achieving precise interference with the UAV communication link.

[0121] Optionally, as Figure 1 shown, the jamming antenna includes an antenna array surface 200 and an antenna pole 300;

[0122] The antenna array surface is composed of N antenna elements, where N is a positive integer; it is configured to receive and process the first signal, the second signal, and send the third signal;

[0123] It should be noted that, as Figure 2 shown, the antenna array surface is composed of three array surfaces, and the effective radiation direction angle of each array surface is controlled within 120°. Among them, the effective radiation direction angle of array surface A is -60° to 60°; the effective radiation direction angle of array surface B is 60° to 180°; the effective radiation direction angle of array surface C is -180° to -60°;

[0124] It should be noted that, as Figure 3As shown, the antenna unit determines whether it is a transmitted signal or a received signal through a duplexer. The received signal path passes through a receive filter, a low-noise amplifier, downconversion, and A / D conversion to convert the signal into a digital signal, and the digital signal is injected into an optical terminal. The signals received by multiple antenna units are digitized and aggregated, then laser-modulated by the optical terminal and transmitted to an interference host through the optical fiber in the antenna pole. The beamforming model is used to analyze the UAV control signal and determine the position of the UAV. After analyzing the first signal, i.e., the UAV control signal, and locating the UAV, the beam control generates a baseband interference waveform and adjusts the phase of the transmitted beamforming. Then, the third signal is injected into the optical terminal through the optical fiber of the antenna pole. The optical terminal then splits the signal to each transmitted signal path. Each transmitted signal path converts the digital signal into an analog signal through D / A, then through upconversion, power amplification, a transmit filter, and a duplexer, and then enters the antenna unit and is converted into an electromagnetic signal and radiated into space;

[0125] The antenna pole 300 is used to support the antenna array 200, send the received first signal and second signal to the interference host 100, and send the third signal to the UAV.

[0126] It can be seen that the interference antenna described in the embodiments of the present invention receives the first signal and the second signal, laying a foundation for subsequent processing of the downlink communication link, i.e., the first signal, to determine the characteristics of the flight control command signal transmitted by the ground control station, and processing the uplink communication link, i.e., the second signal, to determine the spatial orientation characteristics of the UAV. At the same time, the interference antenna is used to transmit a third signal that can effectively interfere with the flight control command signal to the UAV, achieving precise interference of the UAV communication link.

[0127] Embodiment 2

[0128] Please refer to Figure 4 , Figure 4 which is a schematic flowchart of a method for precisely interfering with a UAV communication link disclosed in the embodiments of the present invention. Among them, Figure 4 the described method can be applied to a UAV control system, such as a local server or a cloud server for a UAV control system, etc., which is not limited in the embodiments of the present invention. As Figure 4 shown, the method may include:

[0129] S1, the UAV interference station receives and processes the first signal and the second signal to obtain a first digital signal and a second digital signal respectively;

[0130] S2, the UAV interference station processes the first digital signal and the second digital signal to obtain first signal characteristic information and second signal characteristic information respectively;

[0131] S3. Based on the first signal feature information and the second signal feature information, the UAV jamming station sends the third signal to the UAV to precisely jam the UAV.

[0132] The precise jamming includes first jamming and second jamming.

[0133] It can be seen that implementing the method for precisely jamming a UAV communication link described in the embodiments of the present invention processes the downlink communication link, i.e., the first signal, to determine the signal features of the flight control command signal transmitted by the ground control station, processes the uplink communication link, i.e., the second signal, to determine the spatial orientation features of the UAV, and finally transmits the third signal, i.e., the interference signal, which can effectively interfere with the flight control command signal, to the UAV, thus achieving precise jamming of the UAV communication link.

[0134] Optionally, in the above step S1, the UAV jamming station receives and processes the first signal and the second signal to obtain a first digital signal and a second digital signal respectively, including:

[0135] S11. Receive and acquire the first signal and the second signal.

[0136] S12. Perform filtering, low-noise amplification, down-conversion, and A / D conversion processing on the first signal to obtain a first digital signal.

[0137] S13. Perform filtering, low-noise amplification, down-conversion, and A / D conversion processing on the second signal to obtain a second digital signal.

[0138] It can be seen that implementing the UAV communication link precise jamming device described in the embodiments of the present invention, the UAV jamming station receives and processes the first signal and the second signal to obtain a first digital signal and a second digital signal respectively, providing data support for obtaining the signal features of the flight control command signal and the spatial orientation features, and based on the signal features of the flight control command signal and the spatial orientation features, transmitting an interference signal that can effectively interfere with the flight control command signal to the UAV, thereby achieving precise jamming of the UAV communication link.

[0139] Optionally, in the above step S2, the UAV jamming station processes the first digital signal and the second digital signal to obtain first signal feature information and second signal feature information respectively, including:

[0140] S21. Process the first digital signal to obtain first signal feature information.

[0141] The first signal feature information includes first signal beam feature information, first signal direct beam feature information, first signal time feature information, and first signal frequency feature information.

[0142] S22. Process the second digital signal to obtain second signal feature information;

[0143] The second signal feature information includes second signal elevation angle information and second signal azimuth angle information.

[0144] It can be seen that for the UAV communication link precise interference device described in the embodiments of the present invention, the UAV interference station processes the first digital signal and the second digital signal to obtain first signal feature information and second signal feature information respectively, and based on the first signal feature information and the second signal feature information, transmits an interference signal that can effectively interfere with the flight control command signal to the UAV, thereby achieving precise interference of the UAV communication link.

[0145] Optionally, in the above step S21, the process of processing the first digital signal to obtain first signal feature information includes:

[0146] S211. Use a beamforming model to process the first digital signal to obtain first signal beam feature information;

[0147] The expression of the beamforming model is:

[0148]

[0149]

[0150] Among them, i represents the row index of the antenna element in the antenna array plane; j represents the column index of the antenna element in the antenna array plane; D represents the downlink; p represents the row index of the spatial beam; q represents the column index of the spatial beam; t represents the processing time; represents the beamforming coefficient corresponding to the antenna element at the i-th row and j-th column of the antenna array; α p represents the elevation angle of the p-th row and q-th column spatial beam formed by the antenna array; β q represents the azimuth angle of the p-th row and q-th column spatial beam formed by the antenna array; M represents the number of rows of the antenna array; N represents the number of columns of the antenna array; t represents the third signal output time; represents the angle between the projection of the radio wave propagation direction on the antenna array plane and the X-axis;

[0151] S212. Use a beam selection model to process the first signal beam feature information to obtain first signal direct beam feature information;

[0152] The expression of the beam selection model is:

[0153]

[0154] Among them, i represents the row index of the antenna element in the antenna array plane; j represents the column index of the antenna element in the antenna array plane; D represents the downlink; p represents the row index of the spatial beam; q represents the column index of the spatial beam; t represents the processing time; represents the optimal receiving beamforming coefficient of the antenna element at the i-th row and j-th column of the antenna array plane; represents the equivalent complex signal of the signal received by the antenna element at the i-th row and j-th column of the antenna array plane; c represents the speed of light; ∈ represents the free space fading constant; L BJ represents the distance between the ground control station and the interference station; k represents the free space fading exponent; is the receiving gain of the antenna element in the direction of the direct wave path angle between the ground control station and the UAV interference station; represents the included angle between the direct wave path from the ground control station to the UAV interference station and the Z-axis; represents the included angle between the direct wave path from the ground control station to the UAV interference station and the X-axis; z D (t, α p , β q , JH1) represents the output result of the first polarization direction at time t; z D (t, α p , β q , JH2) represents the output result of the second polarization direction at time t; T1 represents the starting time of the direct beam; T2 represents the ending time of the direct beam;

[0155] It should be noted that in this embodiment, the starting time of the direct beam is set as: T1 = 0s; the ending time of the direct beam is set as: T2 = 10s;

[0156] S213, using the time determination model, processes the direct beam characteristic information to obtain the first signal time characteristic information;

[0157] The first signal time characteristic information includes the first signal transmission start time information and the first signal transmission end time information;

[0158] S214, using the frequency determination model, processes the direct beam characteristic information to obtain the first signal frequency characteristic information;

[0159] The first signal frequency characteristic information includes the first signal frequency lower limit information and the first signal frequency upper limit information.

[0160] It can be seen that by implementing the precise interference device for the UAV communication link described in the embodiments of the present invention, the first digital signal is processed to obtain the first signal feature information. On this basis, an interference signal that can effectively interfere with the flight control command signal is transmitted to the UAV based on the first signal feature information and the second signal feature information, thereby realizing the precise interference of the UAV communication link.

[0161] Optionally, in the above step S213, the process of using the time determination model to process the direct beam feature information to obtain the first signal time feature information includes:

[0162] S2131, using the first time determination model to perform judgment processing on the direct beam feature information to obtain the first judgment result value;

[0163] The expression of the first time determination model is:

[0164]

[0165] Wherein, represents the first threshold value; [T i , T i+1 represents the set time interval; T i+2 represents the judgment processing time;

[0166] It should be noted that in this embodiment, the first threshold value is set as:

[0167] S2132, when the first judgment result value is yes, the time T i+2 is the start time of the signal transmitted by the ground control station, and the first signal transmission start time information is obtained; otherwise, S2133 is executed;

[0168] S2133, using the second time determination model to perform judgment processing on the direct beam feature information to obtain the second judgment result value;

[0169] The expression of the second time determination model is:

[0170]

[0171] Wherein, represents the first threshold value; [T i , T i+1 represents the set time interval; T i+2 represents the judgment processing time;

[0172] S2134, when the second judgment result value is yes, the time T i+2When it is the end time of the signal transmitted by the ground control station, obtain the first signal transmission end time information; otherwise, execute S211.

[0173] It can be seen that by implementing the UAV communication link precise interference device described in the embodiments of the present invention, using the time determination model to process the direct beam feature information to obtain the first signal time feature information, and on this basis, based on the first signal feature information and the second signal feature information, a jamming signal that can effectively jam the flight control command signal is transmitted to the UAV, thereby realizing the precise interference of the UAV communication link.

[0174] Optionally, in the above step S214, the process of using the frequency determination model to process the direct beam feature information to obtain the first signal frequency feature information includes:

[0175] S2141, use the first frequency determination model to perform judgment processing on the direct beam feature information to obtain a third judgment result value;

[0176] The expression of the first frequency determination model is:

[0177]

[0178] Wherein, represents the second threshold; B represents the bandwidth of the receiving filter; f i represents the center frequency of the filter; T1 represents the signal start time; T2 represents the signal end time; [f i -B / 2, f i +B / 2] represents the set signal bandwidth; represents that the bandwidth range of the receiving filter is [f i -B / 2, f i +B / 2];

[0179] It should be noted that in this embodiment, the second threshold is set to:

[0180] S2142, when the third judgment result value is yes, f i -B / 2 is the lower limit of the frequency band occupied by the signal transmitted by the ground control station, and the first signal frequency lower limit information is obtained; otherwise, execute S2143;

[0181] S2143, use the second frequency determination model to perform judgment processing on the direct beam feature information to obtain a fourth judgment result value;

[0182] The expression of the second time determination model is:

[0183]

[0184] Among them, represents the second threshold value; B represents the bandwidth of the receiving filter; fi represents the center frequency of the filter; T1 represents the start time of the signal; T2 represents the end time of the signal; [f i -B / 2, f i +B / 2] represents the set signal bandwidth; represents that the bandwidth range of the receiving filter is [f i -B / 2, f i +B / 2];

[0185] S2144, when the fourth judgment result value is yes, f i+1 +B / 2 is the upper limit of the frequency band occupied by the signal transmitted by the ground control station, and the first signal frequency upper limit information is obtained; otherwise, S211 is executed;

[0186] It should be noted that in this embodiment, the second threshold value is set as:

[0187] It can be seen that by implementing the UAV communication link precise interference device described in the embodiments of the present invention, using the frequency determination model to process the direct beam feature information, the first signal frequency feature information is obtained. On this basis, based on the first signal feature information and the second signal feature information, an interference signal that can effectively interfere with the flight control command signal is transmitted to the UAV, thereby realizing the precise interference of the UAV communication link.

[0188] Optionally, in the above step S22, the processing of the second digital signal to obtain the second signal feature information includes:

[0189] Based on the direct beam selection model, the second digital signal is processed to obtain the second signal feature information, that is, the second signal elevation angle information and the second signal azimuth angle information are obtained;

[0190] The expression of the direct beam selection model is:

[0191]

[0192]

[0193] Among them, α p represents the second signal elevation angle information; β q represents the second signal azimuth angle information; z U (t, ɑ p , β q , JH1) represents the output result of the first polarization direction at time t; z U (t, ɑ p , βq , JH2) represents the output result of the second polarization direction at time t; c represents the speed of light, ∈ represents the free space fading constant, L UJ represents the distance between the UAV and the UAV jamming station; k represents the free space fading exponent, represents the receiving gain of the A-th antenna element in the direction of the direct wave path angle between the UAV and the UAV jamming station; and represents the angle of the direct wave path between the UAV and the UAV jamming station; represents the optimal receiving beamforming coefficient of the antenna element in the i-th row and j-th column; represents the equivalent complex signal of the signal received by the antenna element in the i-th row and j-th column at time t;

[0194] It can be seen that the UAV communication link precise jamming device described in the embodiments of the present invention processes the second digital signal to obtain second signal feature information, and on this basis, based on the first signal feature information and the second signal feature information, a jamming signal that can effectively jam the flight control command signal is transmitted to the UAV, thereby realizing the precise jamming of the UAV communication link.

[0195] Optionally, in the above step S3, based on the first signal feature information and the second signal feature information, the UAV jamming station sends the third signal to the UAV to precisely jam the UAV, including:

[0196] S31. Based on the first signal feature information, determine a first bandwidth;

[0197] It should be noted that the determining the first bandwidth based on the first signal feature information includes:

[0198] S311. Perform parsing processing on the first signal feature information to obtain first signal frequency lower limit information and first signal frequency upper limit information;

[0199] It should be noted that the parsing processing means extracting corresponding information according to the character identifier;

[0200] S312. Perform calculation processing on the first signal frequency lower limit information and the first signal frequency upper limit information to obtain the first bandwidth of the first signal;

[0201] The calculation processing expression is:

[0202] B = |B h - B l |;

[0203] Among them, B represents the first bandwidth; B h represents the upper limit value of the first signal frequency; B l represents the lower limit value of the first signal frequency;

[0204] S32. Determine a second bandwidth based on the third signal;

[0205] It should be noted that the second bandwidth represents the bandwidth of the third signal;

[0206] S33. Align the third signal with the first signal in terms of time and frequency based on the first signal feature information;

[0207] It should be noted that the moment when the ground control station transmits the flight control instruction signal is determined by the first signal feature information to guide the interference device to turn on the transmission function of the duplexer, and interference signals are transmitted during this time period;

[0208] Determine the pitch angle information and azimuth angle information of the third signal based on the second signal feature information;

[0209] It should be noted that after estimating the spatial orientation of the UAV, the second signal feature information is obtained. After generating a signal that meets the time and frequency requirements, according to the reciprocity principle of the antenna, the beamforming coefficients of each antenna unit are adjusted according to the second signal feature information, so that the energy radiation of the third signal accurately points to the UAV;

[0210] S34. Determine whether the first bandwidth is less than the second bandwidth to obtain a signal bandwidth judgment result;

[0211] S35. When the signal bandwidth judgment result is yes, the UAV jammer performs a first interference on the UAV using the pitch angle information and the azimuth angle information;

[0212] It should be noted that the first interference means that if the bandwidth of the transmitting filter is greater than the flight control instruction signal, that is, the first bandwidth is less than the second bandwidth, interference signals can be directly transmitted for coverage;

[0213] When the signal bandwidth judgment result is no, the UAV jammer performs a second interference on the UAV using the pitch angle information and the azimuth angle information;

[0214] It should be noted that the second interference means that if the bandwidth of the transmitting filter is less than the flight control instruction signal, that is, the first bandwidth is greater than or equal to the second bandwidth, a comb-shaped spectrum signal is transmitted for interference;

[0215] It should be noted that in this embodiment, the working frequency range of the first signal, i.e., the flight control command signal, is [2445 MHz, 2455 MHz], the bandwidth B of the transmitting filter is 1 MHz, the transmitting filter is composed of multiple filters with a bandwidth of B, and the working frequency ranges of the comb-shaped spectrum interference signals are [2445 MHz, 2456 MHz], [2448 MHz, 2449 MHz], [2451 MHz, 2452 MHz], [2454 MHz, 2455 MHz].

[0216] It can be seen that by implementing the drone communication link precise interference device described in the embodiments of the present invention, based on the first signal characteristic information and the second signal characteristic information, the drone interference station sends the third signal to the drone to precisely interfere with the drone. By utilizing the characteristics of the flight control command signal in the downlink communication link and the spatial orientation characteristics of the drone in the uplink communication link, the third signal, i.e., the interference signal, that can effectively interfere with the flight control command signal is transmitted to the drone, achieving precise interference with the drone communication link.

[0217] Embodiment Three

[0218] Please refer to FIG. 5. Figure 5 It is a schematic structural diagram of precise interference of a drone communication link based on a large-scale array antenna disclosed in the embodiments of the present invention. Among them, Figure 5 The described device can be applied to a drone control system, such as a local server or a cloud server for a drone control system, etc., which is not limited in the embodiments of the present invention. As Figure 5 shown, the device may include:

[0219] A memory 201 storing executable program code;

[0220] A processor 202 coupled to the memory 201;

[0221] The processor 202 calls the executable program code stored in the memory 201 to execute the steps in the method for precise interference of a drone communication link described in Embodiment One.

[0222] Embodiment Four

[0223] The embodiments of the present invention disclose a computer-readable storage medium that stores a computer program for electronic data exchange, wherein the computer program enables a computer to execute the steps in the method for precise interference of a drone communication link described in Embodiment One.

[0224] Embodiment Five

[0225] An embodiment of the present invention discloses a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute the steps in the precise interference device for the UAV communication link described in Embodiment 1.

[0226] The device embodiments described above are merely illustrative. The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed to multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative effort.

[0227] Through the specific descriptions of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the above technical solution, in essence, or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium. The storage medium includes read-only memory (ROM), random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), one-time programmable read-only memory (OTPROM), electrically-erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc memories, magnetic disk memories, tape memories, or any other computer-readable medium capable of carrying or storing data.

[0228] Finally, it should be noted that: The drone communication link precise interference device, system, and device disclosed in the embodiments of the present invention are only the preferred embodiments of the present invention, and are only used to illustrate the technical solutions of the present invention, rather than limiting it; Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An accurate interference device for an unmanned aerial vehicle communication link, characterized in that, The device includes: a ground control station and a UAV jamming station; The ground control station is used to send a first signal to the UAV and receive a second signal sent by the UAV; The first signal represents a UAV control signal; the second signal represents a UAV status signal; The UAV jamming station is used to receive and process the first signal sent by the ground control station and the second signal sent by the UAV, and send a third signal to the UAV; The third signal represents a UAV jamming signal.

2. The precise interference device for the UAV communication link according to claim 1, wherein The UAV jamming station includes: a jamming host and a jamming antenna; The jamming antenna is used to receive the first signal and the second signal, and send them to the jamming host, receive the third signal sent by the jamming host, and send the third signal to the UAV; The jamming host is used to receive and process the first signal and the second signal received by the jamming antenna, and send the third signal to the jamming antenna.

3. The precise interference device for the UAV communication link according to claim 2, characterized in that The jamming antenna includes: an antenna array and an antenna pole; The antenna array is composed of N antenna units, where N is a positive integer; it is used to receive and process the first signal, the second signal, and send the third signal; The antenna pole is used to support the antenna array, send the received first signal and second signal to the jamming host, and send the third signal to the UAV.

4. A precise interference method for an unmanned aerial vehicle (UAV) communication link, which is applied to the precise interference device for the UAV communication link according to any one of claims 1 to 3, and is characterized in that, The method includes: S1. The UAV jamming station receives and processes the first signal and the second signal, and respectively obtains a first digital signal and a second digital signal; S2. The UAV jamming station processes the first digital signal and the second digital signal, and respectively obtains first signal feature information and second signal feature information; S3. Based on the first signal feature information and the second signal feature information, the UAV jamming station sends the third signal to the UAV to perform precise jamming on the UAV; The precise jamming includes first jamming and second jamming.

5. The method for precisely interfering with the communication link of a drone according to claim 4, wherein The UAV jamming station receives and processes the first signal and the second signal, and respectively obtains a first digital signal and a second digital signal, including: S11. Receive and obtain the first signal and the second signal; S12. Perform filtering, low-noise amplification, down-conversion, and A / D conversion processing on the first signal to obtain a first digital signal; S13. Perform filtering, low-noise amplification, down-conversion, and A / D conversion processing on the second signal to obtain a second digital signal.

6. The method for precisely interfering with the communication link of a drone according to claim 4, wherein The UAV jamming station processes the first digital signal and the second digital signal, and respectively obtains first signal feature information and second signal feature information, including: S21. Process the first digital signal to obtain first signal feature information; The first signal feature information includes first signal beam feature information, first signal direct beam feature information, first signal time feature information, and first signal frequency feature information; S22. Process the second digital signal to obtain second signal feature information; The second signal feature information includes second signal elevation angle information and second signal direction angle information.

7. The method for precisely interfering with the communication link of an unmanned aerial vehicle according to claim 6, characterized in that, Processing the first digital signal to obtain first signal feature information includes: S211. Processing the first digital signal using a beamforming model to obtain first signal beam feature information; The expression of the beamforming model is: Among them, i represents the row index of the antenna element in the antenna array plane; j represents the column index of the antenna element in the antenna array plane; D represents the downlink; p represents the row index of the spatial beam; q represents the column index of the spatial beam; t represents the processing time; represents the beamforming coefficient corresponding to the antenna element at the i-th row and j-th column of the antenna array plane; ɑ p represents the elevation angle of the spatial beam at the p-th row and q-th column formed by the antenna array plane; β q represents the azimuth angle of the spatial beam at the p-th row and q-th column formed by the antenna array plane; M represents the number of rows of the antenna array plane; N represents the number of columns of the antenna array plane; t represents the third signal output time; represents the angle between the projection of the radio wave propagation direction on the antenna array plane and the X-axis; S212. Processing the first signal beam feature information using a beam selection model to obtain first signal direct beam feature information; The expression of the beam selection model is: Among them, i represents the row index of the antenna element in the antenna array plane; j represents the column index of the antenna element in the antenna array plane; D represents the downlink; p represents the row index of the spatial beam; q represents the column index of the spatial beam; t represents the processing time; represents the optimal receiving beamforming coefficient of the antenna element at the i-th row and j-th column of the antenna array plane; represents the equivalent complex signal of the signal received by the antenna element at the i-th row and j-th column of the antenna array plane; c represents the speed of light; ∈ represents the free space fading constant; L BJ represents the distance between the ground control station and the interference station; k represents the free space fading exponent; is the receiving gain of the antenna element in the direction of the radio wave direct path angle between the ground control station and the UAV interference station; represents the angle between the radio wave direct path from the ground control station to the UAV interference station and the Z-axis; represents the angle between the radio wave direct path from the ground control station to the UAV interference station and the X-axis; z D (t, α p , β q , JH1) represents the output result of the first polarization direction at time t; z D (t, ɑ p , β q , JH2) represents the output result of the second polarization direction at time t; T1 represents the starting time of the direct beam; T2 represents the ending time of the direct beam signal; S213. Processing the direct beam feature information using a time determination model to obtain first signal time feature information; The first signal time feature information includes first signal transmission start time information and first signal transmission end time information; S214. Processing the direct beam feature information using a frequency determination model to obtain first signal frequency feature information; The first signal frequency feature information includes first signal frequency lower limit information and first signal frequency upper limit information.

8. The method for precisely interfering with a UAV communication link according to claim 7, wherein Processing the direct beam feature information using the time determination model to obtain first signal time feature information includes: S2131. Judging and processing the direct beam feature information using a first time determination model to obtain a first judgment result value; The expression of the first time determination model is: Among them, represents the first threshold value; [T i , T i+1 represents the set time interval; T i+2 represents the judgment processing time; S2132. When the first judgment result value is yes, the moment T i+2 is the start time of the signal transmitted to the ground control station, and the first signal transmission start time information is obtained; otherwise, S2133 is executed. S2133. Judging and processing the direct beam feature information using a second time determination model to obtain a second judgment result value; The expression of the second time determination model is: Among them, represents the first threshold value; [T i , T i+1 represents the set time interval; T i+2 represents the judgment processing time; S2134. When the second judgment result value is yes, the time T i+2 is the signal transmission end time of the ground control station, and the first signal transmission end time information is obtained; otherwise, S211 is executed.

9. The method for precisely interfering with a UAV communication link according to claim 7, wherein Processing the direct beam feature information using the frequency determination model to obtain first signal frequency feature information includes: S2141. Judging and processing the direct beam feature information using a first frequency determination model to obtain a third judgment result value; The expression of the first frequency determination model is: Wherein, represents the second threshold value; B represents the bandwidth of the receiving filter; fi represents the center frequency of the filter; T1 represents the start time of the signal frame; T2 represents the end time of the signal frame; [f - B / 2, fi + B / 2] represents the set signal bandwidth; represents that the bandwidth range of the receiving filter is [f i - B / 2, f i + B / 2]; S2142, when the third judgment result value is yes, f i -B / 2 is the lower limit of the frequency band occupied by the signal transmitted by the ground control station, and the first signal frequency lower limit information is obtained; otherwise, S2143 is executed; S2143. Judging and processing the direct beam feature information using a second frequency determination model to obtain a fourth judgment result value; The expression of the second time determination model is: Among them, represents the second threshold value; B represents the bandwidth of the receiving filter; fi represents the center frequency of the filter; T1 represents the start time of the signal frame; T2 represents the end time of the signal frame; [f i -B / 2, f i +B / 2] represents the set signal bandwidth; represents that the bandwidth range of the receiving filter is [f i -B / 2, f i +B / 2]; S2144, when the fourth judgment result value is yes, f i+1 +B / 2 is the upper limit of the frequency band occupied by the signal transmitted by the ground control station, and the first signal frequency upper limit information is obtained; otherwise, S211 is executed.

10. The method for precisely interfering with the UAV communication link according to claim 4, characterized in that, Based on the first signal feature information and the second signal feature information, the UAV jamming station sends the third signal to the UAV to perform precise jamming on the UAV, including: S31. Determining a first bandwidth based on the first signal feature information; S32. Determining a second bandwidth based on the third signal; S33. Aligning the third signal with the first signal in terms of time and frequency based on the first signal feature information; Determining the pitch angle information and azimuth angle information of the third signal based on the second signal feature information; S34. Judging whether the first bandwidth is less than the second bandwidth to obtain a signal bandwidth judgment result; S35. When the signal bandwidth judgment result is yes, the UAV jamming station performs a first interference on the UAV using the pitch angle information and the azimuth angle information; When the signal bandwidth judgment result is no, the UAV jamming station performs a second interference on the UAV using the pitch angle information and the azimuth angle information.

Images