360-degree heavy-rail circular track annular video synthetic aperture radar interference method and system

Abstract

The invention discloses a 360-degree heavy rail circular track annular video synthetic aperture radar interference method and system, and the method specifically comprises the steps: carrying out the analysis of an intercepted enemy monorail signal, and obtaining an enemy radar signal parameter and a platform motion parameter; guiding multi-different-orbit analysis according to the enemy parameters to obtain parameters of different orbits; solving a false point coefficient by using an own deception template, controlling the size and direction of a video template to obtain a deception jamming modulation coefficient video library, and generating a heavy orbit targeted deception strategy according to reconnaissance parameters of different orbits; and finally, generating and modulating a deception signal by using a deception jamming modulation coefficient video library and a heavy rail targeted deception strategy to obtain an orientation-pitching combined deception jamming signal forwarded track by track, and interfering an enemy track by track to realize a deception effect. The 360-degree heavy rail circular track band Video SAR system deception jamming method achieves the purpose of deception jamming on the 360-degree heavy rail circular track band Video SAR system, and has the advantage that heavy rail jamming and azimuth-pitching joint deception are carried out at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of 360-degree heavy track circular track annular video synthetic aperture radar jamming and countermeasure, in particular to a 360-degree heavy track circular track annular video synthetic aperture radar jamming method and system. Background Art

[0002] Synthetic Aperture Radar (SAR) can reflect the microwave scattering characteristics and field of view information of the target, so that the radar sensor has the ability to image, detect and interpret the target. The development of all-day and all-weather SAR technology has laid the foundation for microwave remote sensing detection technology, and achieved ground observation with resolution from meter level to sub-centimeter level. At present, SAR observation channels have developed from single channel to multi-channel, channel configuration has developed from linear to cross-linear and curved, and aperture manifold has developed from straight line to curved and surface, and to three-dimensional with multiple curves interwoven.

[0003] As microwave remote sensing detection technology develops from static images to dynamic videos, researchers have invented a new type of video synthetic aperture radar (Video Synthetic Aperture Radar, VideoSAR) technology. Since the VideoSAR system has the characteristics of high frame rate and high resolution imaging, it can continuously illuminate and accumulate data on dynamic areas of interest with the help of imaging channels and aperture manifolds, and obtain dozens or even hundreds of thousands of frames of ground image sequences, which can be comparable to the dynamic display effect of optical video when played continuously. Under the influence of the new imaging development model, the 360-degree re-orbit circular track ring VideoSAR mode for wide-area surveillance and reconnaissance can periodically adjust the ground position of the beam scan, thereby forming an extension of the area. Its re-orbit mechanism will reveal more spatial characteristics than single-channel or multi-channel technology, and can be applied to differential interferometry and tomography.

[0004] With the widespread application of the new VideoSAR reconnaissance technology, it is urgent to take electronic countermeasures and interference measures to weaken and destroy the enemy's VideoSAR reconnaissance. Existing countermeasures all use suppression and deception interference techniques, and most of them are aimed at single SAR images, different signal waveform types, multi-channel configurations, array SAR, and degrees of freedom. Invention patent CN114609598B discloses a synthetic aperture radar (SAR) scene deception interference method based on image inversion. First, SAR image inversion preprocessing is performed, SAR image interference scene setting is performed, and SAR image inversion template complex data is generated; then the CS inversion algorithm is used to invert the image to echo, azimuth phase inversion, range phase, SRC and consistent RCMC inversion and complementary RCMC inversion; finally, interference data is generated. Invention patent CN117496000B discloses a method and device for generating an interference template image, which includes obtaining a background sample image from a preset background sample image library; generating a background template image composed of a plurality of to-be-processed pixel blocks according to a preset interference template image size through a preset noise processing model; determining a first neighborhood matrix corresponding to a current to-be-processed pixel block in the background template image through a preset neighborhood matrix model; determining a plurality of second neighborhood matrices having the same matrix attribute parameters as the first neighborhood matrix in the background sample image through a preset neighborhood matrix model; calculating the distance value between the first neighborhood matrix and each second neighborhood matrix through a preset distance calculation model to determine a target pixel block corresponding to a second neighborhood matrix having a minimum distance value corresponding relationship with the first neighborhood matrix in the background sample image; updating the color parameters of the current to-be-processed pixel block according to the color parameters of the target pixel block; and obtaining a first interference template image for deceiving and interfering with a synthetic aperture radar when the color parameters of the to-be-processed pixel block in the background template image are updated. These traditional jamming methods such as single SAR image, multi-channel SAR, frequency-controlled array SAR, etc. are not targeted at the VideoSAR system, nor at the 360-degree heavy-track circular-band VideoSAR imaging mode. Therefore, it is urgent to study a deception jamming method and countermeasure strategy for 360-degree heavy-track circular-band VideoSAR to meet the needs of deception jamming of the 360-degree heavy-track circular-band VideoSAR system. Summary of the invention

[0005] The purpose of the present invention is to provide a 360-degree heavy track circular track annular video synthetic aperture radar jamming method and system, which is a radar jamming method for confusing and disrupting the enemy's combat capability with false targets.

[0006] The technical solution to achieve the purpose of the present invention is: a 360-degree heavy track circular track ring video synthetic aperture radar jamming method, comprising the following steps:

[0007] Step 1: intercept the enemy's 360-degree heavy track circular ring VideoSAR radar signal in the first single track;

[0008] Step 2: Analyze the enemy's first single-track VideoSAR radar signal to obtain the enemy's single-track VideoSAR signal parameters and platform motion parameters;

[0009] Step 3: Guide the multi-track analysis based on the enemy's single-track VideoSAR signal parameters and platform motion parameters to obtain reconnaissance parameters of different tracks;

[0010] Step 4: Use the 360-degree heavy track circular spotlight VideoSAR deception template to solve the false point coefficient, and control the size and direction of the video template according to the target scene requirements to obtain the 360-degree heavy track circular spotlight VideoSAR deception interference modulation coefficient video library;

[0011] Step 5: Generate a fast heavy-track multi-angle jamming strategy based on the reconnaissance parameters of different tracks to obtain the VideoSAR heavy-track targeted deception strategy;

[0012] Step 6: Use the 360-degree heavy track circular spotlight VideoSAR deception jamming modulation coefficient video library and the VideoSAR heavy track targeted deception strategy to generate and modulate the 360-degree heavy track circular ring VideoSAR deception signal to obtain the azimuth-elevation joint deception jamming signal forwarded track by track;

[0013] Step 7: Forward the azimuth-elevation joint deception jamming signal track by track to interfere with the enemy's heavy-track circular-band VideoSAR system track by track to achieve the deception effect.

[0014] A 360-degree heavy track circular track annular video synthetic aperture radar jamming system, the system is used to implement the 360-degree heavy track circular track annular video synthetic aperture radar jamming method, the system includes a radar signal interception module, a single track analysis module, a multi-track analysis module, a modulation coefficient video library determination module, a deception strategy generation module, a deception jamming signal generation module and a jamming module, wherein:

[0015] Radar signal interception module, used to intercept the enemy's 360-degree heavy track circular ring VideoSAR radar signal in the first single track;

[0016] The single-track analysis module is used to analyze the enemy's first single-track VideoSAR radar signal to obtain the enemy's single-track VideoSAR signal parameters and platform motion parameters;

[0017] The multi-track analysis module guides the multi-track analysis based on the enemy's single-track VideoSAR signal parameters and platform motion parameters to obtain reconnaissance parameters of different tracks;

[0018] The modulation coefficient video library determination module uses the 360-degree heavy track circular spotlight VideoSAR deception template to solve the false point coefficient, and controls the size and direction of the video template according to the target scene requirements to obtain the 360-degree heavy track circular spotlight VideoSAR deception interference modulation coefficient video library;

[0019] The deception strategy generation module is used to generate fast heavy-track multi-angle jamming strategies based on the reconnaissance parameters of different tracks to obtain the VideoSAR heavy-track targeted deception strategy;

[0020] The deception jamming signal generation module uses the 360-degree heavy track circular spotlight VideoSAR deception jamming modulation coefficient video library and VideoSAR heavy track targeted deception strategy to generate and modulate the 360-degree heavy track circular ring VideoSAR deception signal, and obtain the azimuth-elevation joint deception jamming signal forwarded on a track-by-track basis;

[0021] The jamming module forwards the azimuth-elevation joint deception jamming signal on a track-by-track basis, jamming the enemy's heavy-track circular-band VideoSAR system on a track-by-track basis to achieve a deception effect.

[0022] Compared with the prior art, the present invention has the following significant advantages: (1) It can deceive and interfere with the 360-degree heavy-track circular-band VideoSAR system, and use false targets to confuse and disrupt the enemy's azimuth-elevation target discrimination, thereby reducing the enemy's 360-degree heavy-track circular-band VideoSAR system's probability of discovering real targets, reducing the enemy's combat capability, and improving the battlefield survivability of one's own side; (2) Aiming at the interference strategy of the 360-degree heavy-track circular-band VideoSAR system, a fast heavy-track multi-angle interference strategy is proposed, which can pre-modulate the interference signal before the next heavy-track imaging. It only needs to update and modulate its height difference and pitch angle, and the other parameters do not need to be repeatedly detected and modulated, which reduces the equipment burden and improves the interference efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a flow chart of a 360-degree heavy track circular track annular zone video synthetic aperture radar jamming method.

[0024] Figure 2 This is an example diagram of templates of different orientations and different depression angles of target 1 and target 2 generated by the 360-degree heavy-track circular spotlight VideoSAR mode in an embodiment of the present invention.

[0025] Figure 3 It is a schematic diagram of the undisturbed 360-degree heavy-track circular ring VideoSAR measurement results in an embodiment of the present invention.

[0026] Figure 4 Schematic diagrams of the results of spoofing interference of the true azimuth and pitch angle with target 1 and target 2 respectively in an embodiment of the present invention, wherein (a) is a schematic diagram of the spoofing interference result of track 1 in scene 1, (b) is a schematic diagram of the spoofing interference result of track 2 in scene 1, (c) is a schematic diagram of the spoofing interference result of track 1 in scene 2, and (d) is a schematic diagram of the spoofing interference result of track 2 in scene 2.

[0027] Figure 5 Schematic diagrams of the results of false pitch angle deception interference with target 1 and target 2 respectively in an embodiment of the present invention, wherein (a) is a schematic diagram of the deception interference result of orbit 1, i.e., 31°, (b) is a schematic diagram of the deception interference result of orbit 1, i.e., 37°, (c) is a schematic diagram of the deception interference result of orbit 1, i.e., 45°, (d) is a schematic diagram of the deception interference result of orbit 2, i.e., 26°, (e) is a schematic diagram of the deception interference result of orbit 2, i.e., 37°, and (f) is a schematic diagram of the deception interference result of orbit 2, i.e., 45°. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Combination Figure 1 The present invention provides a 360-degree heavy track circular track annular video synthetic aperture radar jamming method, comprising the following steps:

[0030] Step 1: intercept the enemy's 360-degree heavy track circular ring VideoSAR radar signal in the first single track;

[0031] Step 2: Analyze the enemy's first single-track VideoSAR radar signal to obtain the enemy's single-track VideoSAR signal parameters and platform motion parameters;

[0032] Step 3: Guide the multi-track analysis based on the enemy's single-track VideoSAR signal parameters and platform motion parameters to obtain reconnaissance parameters of different tracks;

[0033] Step 4: Use the 360-degree heavy track circular spotlight VideoSAR deception template to solve the false point coefficient, and control the size and direction of the video template according to the target scene requirements to obtain the 360-degree heavy track circular spotlight VideoSAR deception interference modulation coefficient video library;

[0034] Step 5: Generate a fast heavy-track multi-angle jamming strategy based on the reconnaissance parameters of different tracks to obtain the VideoSAR heavy-track targeted deception strategy;

[0035] Step 6: Use the 360-degree heavy track circular spotlight VideoSAR deception jamming modulation coefficient video library and the VideoSAR heavy track targeted deception strategy to generate and modulate the 360-degree heavy track circular ring VideoSAR deception signal to obtain the azimuth-elevation joint deception jamming signal forwarded track by track;

[0036] Step 7: Forward the azimuth-elevation joint deception jamming signal track by track to interfere with the enemy's heavy-track circular-band VideoSAR system track by track to achieve the deception effect.

[0037] As a specific example, the interception of the enemy's 360-degree heavy-track circular track ring VideoSAR radar signal in the first single track described in step 1 includes other parameters besides the heavy-track height difference and the pitch angle, and the other parameters include signal waveform type, carrier frequency, frequency modulation slope, pulse repetition frequency, and average speed.

[0038] As a specific example, the enemy's 360-degree heavy-track circular-trace annular VideoSAR described in step 1 is carried on the enemy's spacecraft, and the radar working mode is a 360-degree heavy-track video circular-trace annular imaging mode at different height dimensions.

[0039] As a specific example, in step 2, the enemy's first single-track VideoSAR radar signal is analyzed to obtain the enemy's single-track VideoSAR signal parameters and platform motion parameters, as follows:

[0040] Analyze the enemy's single-track VideoSAR signal data s(t,t,x,y,i,W), and use the first single-track signal s(t,t,x,y,i,1) to generate the signal parameters and platform motion parameters corresponding to each frame, so as to guide the jammer to initially form the jamming parameters;

[0041] Where t and t are the distance time and azimuth time, respectively; x and y are the azimuth and distance positions of any point in the scene, respectively; i represents the i-th frame, i = 1, 2, ..., K, K represents the total number of frames, and W is a positive integer representing the total number of repeated tracks observed by the radar at different altitudes.

[0042] As a specific example, in step 3, the multi-track analysis is guided according to the enemy's single-track VideoSAR signal parameters and platform motion parameters to obtain the reconnaissance parameters of different tracks, as follows:

[0043] Based on the characteristics of 360-degree double-track circular-track annular VideoSAR imaging mode, other parameters except double-track height difference and pitch angle are obtained by using single-track signal parameters and platform motion parameters.

[0044] For the relevant parameters of multiple re-orbit imaging flights, it is only necessary to detect and update the altitude difference and pitch angle. The other parameters do not need to be repeatedly detected and analyzed, avoiding the process of multiple reconnaissance, identification and analysis. Therefore, the jammer can pre-modulate the jamming signal before the next re-orbit imaging.

[0045] As a specific example, in step 4, the false point coefficient is solved by using the own 360-degree heavy track circular spotlight VideoSAR deception template, and the size and direction of the video template are controlled according to the target scene requirements to obtain the 360-degree heavy track circular spotlight VideoSAR deception interference modulation coefficient video library, as follows:

[0046] Step 4.1: Assume that there is an ε jammer on the ground at different positions in the large scene to interfere with the enemy system respectively. Then, the template composed of backscatter coefficients is solved by 360-degree heavy track circular spotlight VideoSAR mode imaging. for:

[0047]

[0048] Among them, x j and j They correspond to the azimuth and distance positions of the interference template respectively. are the positions corresponding to the azimuth of the interference template pixels, are the distances of the interference template pixels to the corresponding positions, N a and N r are the number of pixels in the azimuth and distance directions of the i-th frame template obtained after imaging, θ i is the azimuth angle of the i-th frame, is the top-down angle of the Wth track, s() represents the corresponding scattering coefficient value;

[0049] Step 4.2: According to the requirements of the target scene, the video template is processed by interpolation resampling or frequency domain zero filling signal processing method. Dimensional control:

[0050]

[0051] in, is the image domain data of the i-th frame template obtained after imaging; is the image domain data of the i-th frame template after size control, and are the number of pixels in the azimuth and distance directions of the i-th frame template after size control;

[0052] Step 4.3: Create a video template based on the target scene requirements Angle control:

[0053]

[0054] Among them, θ rot is the rotation angle of the video template;

[0055] Step 4.4, Video template After size control and angle control, the point (x j ,y j ) to the new position The video template becomes

[0056] As a specific example, in step 5, a fast re-orbit multi-angle jamming strategy is generated based on the reconnaissance parameters of different orbits to obtain a VideoSAR re-orbit targeted deception strategy, as follows:

[0057] For any ground jammer ε, the fast re-orbit multi-angle jamming signals that can be selected are:

[0058]

[0059] The 360-degree heavy track circular ring VideoSAR deception style is selected through the jamming strategy selection switch function Sel(·). The jamming strategies include the following four:

[0060] (1) Based on the heavy orbit circular beamforming mode, the real azimuth is used And the real top-down perspective The generated heavy orbit circular band interference signal with the same azimuth and elevation angle;

[0061] (2) Based on the heavy orbit circular beamforming mode, the false azimuth is used And the real top-down perspective The generated heavy orbit circular band interference signals with different azimuth angles and the same elevation angle;

[0062] (3) Based on the heavy orbit circular beamforming mode, the real azimuth is used and false top-down perspective Generate heavy orbit circular band interference signals with the same azimuth and different elevation angles;

[0063] (4) Based on the heavy orbit circular beamforming mode, the false azimuth is used and false top-down perspective The generated heavy orbit circular band interference signals are of different azimuth and elevation angles.

[0064] As a specific example, in step 6, the 360-degree heavy track circular spotlight VideoSAR deception interference modulation coefficient video library and the VideoSAR heavy track targeted deception strategy are used to generate and modulate the 360-degree heavy track circular ring VideoSAR deception signal to obtain the azimuth-pitch joint deception interference signal forwarded on a track-by-track basis. The joint deception interference signal includes the following four types:

[0065] (1) Using the 360-degree heavy track circular spotlight VideoSAR deception jamming interference modulation coefficient video library and VideoSAR heavy track targeted deception strategy, and based on the heavy track circular spotlight mode, using the real azimuth And the real top-down perspective The generated heavy orbit circular band interference signal with the same azimuth and elevation angle is:

[0066]

[0067] Wherein, mod{A,B} represents the signal modulation operation of A and B;

[0068] (2) Using the 360-degree heavy track circular spotlight VideoSAR deception interference modulation coefficient video library and VideoSAR heavy track targeted deception strategy, and based on the heavy track circular spotlight mode, using false azimuth And the real top-down perspective The generated heavy orbit circular band interference signals with different azimuth angles and the same elevation angle are:

[0069]

[0070] (3) Using the 360-degree heavy track circular spotlight VideoSAR deception jamming interference modulation coefficient video library and VideoSAR heavy track targeted deception strategy, and based on the heavy track circular spotlight mode, using the real azimuth and false top-down perspective The generated heavy orbit circular band interference signals with the same azimuth and different elevation angles are:

[0071]

[0072] (4) Using the 360-degree heavy track circular beamforming VideoSAR deception interference modulation coefficient video library and VideoSAR heavy track targeted deception strategy, and based on the heavy track circular beamforming mode, using false azimuth and false top-down perspective The generated heavy orbit circular band interference signals at different azimuths and elevations are:

[0073]

[0074] As a specific example, in step 7, the azimuth-elevation joint deception jamming signal is forwarded track by track to interfere with the enemy's heavy-track circular-track ring VideoSAR system track by track to achieve a deception effect, as follows:

[0075] The deception jamming signals of four VideoSAR false scenes are forwarded, so that the video deception jamming and the real scene echo signals are received by the enemy VideoSAR system at the same time, and the final deception jamming imaging effect of VideoSAR on multiple different orbits and heavy orbit circular bands is achieved;

[0076] The forwarding of four jamming signals and several choices between different orbits can derive several combinations for strategic jamming of azimuth-elevation joint deception to disrupt the enemy radar's discrimination of targets; for fast re-orbit jamming, the jamming signal can be pre-modulated before the next re-orbit imaging, and only the height difference and pitch angle need to be updated and modulated, and the other parameters do not need to be repeatedly detected and modulated.

[0077] The present invention also provides a 360-degree heavy track circular track annular video synthetic aperture radar jamming system, which is used to implement the 360-degree heavy track circular track annular video synthetic aperture radar jamming method. The system includes a radar signal interception module, a single track analysis module, a multi-track analysis module, a modulation coefficient video library determination module, a deception strategy generation module, a deception jamming signal generation module and a jamming module, wherein:

[0078] Radar signal interception module, used to intercept the enemy's 360-degree heavy track circular ring VideoSAR radar signal in the first single track;

[0079] The single-track analysis module is used to analyze the enemy's first single-track VideoSAR radar signal to obtain the enemy's single-track VideoSAR signal parameters and platform motion parameters;

[0080] The multi-track analysis module guides the multi-track analysis based on the enemy's single-track VideoSAR signal parameters and platform motion parameters to obtain reconnaissance parameters of different tracks;

[0081] The modulation coefficient video library determination module uses the 360-degree heavy track circular spotlight VideoSAR deception template to solve the false point coefficient, and controls the size and direction of the video template according to the target scene requirements to obtain the 360-degree heavy track circular spotlight VideoSAR deception interference modulation coefficient video library;

[0082] The deception strategy generation module is used to generate fast heavy-track multi-angle jamming strategies based on the reconnaissance parameters of different tracks to obtain the VideoSAR heavy-track targeted deception strategy;

[0083] The deception jamming signal generation module uses the 360-degree heavy track circular spotlight VideoSAR deception jamming modulation coefficient video library and VideoSAR heavy track targeted deception strategy to generate and modulate the 360-degree heavy track circular ring VideoSAR deception signal, and obtain the azimuth-elevation joint deception jamming signal forwarded on a track-by-track basis;

[0084] The jamming module forwards the azimuth-elevation joint deception jamming signal on a track-by-track basis, jamming the enemy's heavy-track circular-band VideoSAR system on a track-by-track basis to achieve a deception effect.

[0085] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0086] Example

[0087] In this embodiment, the measured data of two targets of a certain drone-borne 360-degree heavy track circular spotlight mode VideoSAR are used as video deception templates, and the measured data of another drone-borne 360-degree heavy track circular ring VideoSAR are used as interference objects, and the measured data of the drone-borne VideoSAR of the jammer and the interference object are simulated.

[0088] Figure 2 This is an example of templates of different orientations and different depression angles of target 1 and target 2 generated by our side using the 360-degree heavy track circular spotlight VideoSAR mode in this embodiment. It is the source of generating the reference deception template. A series of deception templates are generated according to the targets in the figure. Figure 3 This is the undisturbed 360-degree heavy track circular ring VideoSAR measurement result in this embodiment, which is the area where deception interference is performed. Figure 4 are the results of real azimuth and depression angle deception interference with target 1 and target 2 in this embodiment, where Figure 4 (a) is a schematic diagram of the deception interference results of scene 1 track 1. Figure 4 (b) is a schematic diagram of the deception interference results of scene 1 track 2. Figure 4 (c) is a schematic diagram of the deception interference results of track 1 in scenario 2. Figure 4 (d) is a schematic diagram of the deception interference results of track 2 in scene 2. Figure 5 are the results of false pitch angle deception interference with target 1 and target 2 in this embodiment, where Figure 5 (a) is a schematic diagram of the deception interference results of track 1 (31°). Figure 5 (b) is a schematic diagram of the deception interference results of track 1 (37°). Figure 5 (c) is a schematic diagram of the deception interference results of track 1 (45°). Figure 5 (d) is track 2 (26°) Figure 5 (e) Schematic diagram of the deception interference results of track 2 (37°), Figure 5 (f) in the figure is a schematic diagram of the deception interference results of track 2 (45°).

[0089] from Figure 4 , Figure 5 It can be seen that the method proposed in the present invention can realize fast heavy track interference and azimuth-pitch joint deception interference on 360-degree heavy track circular ring VideoSAR dynamic video. It can be seen from the imaging results after deception interference that the method of the present invention can achieve heavy track targeted interference performance.

[0090] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary method personnel in the field of this method can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A 360-degree heavy track circular ring video synthetic aperture radar jamming method, characterized in that: The following steps are involved: Step 1: intercept the enemy's 360-degree heavy track circular ring VideoSAR radar signal in the first single track; Step 2: Analyze the enemy's first single-track VideoSAR radar signal to obtain the enemy's single-track VideoSAR signal parameters and platform motion parameters; Step 3: Guide the multi-track analysis based on the enemy's single-track VideoSAR signal parameters and platform motion parameters to obtain reconnaissance parameters of different tracks; Step 4: Use the 360-degree heavy track circular spotlight VideoSAR deception template to solve the false point coefficient, and control the size and direction of the video template according to the target scene requirements to obtain the 360-degree heavy track circular spotlight VideoSAR deception interference modulation coefficient video library; Step 5: Generate a fast heavy-track multi-angle jamming strategy based on the reconnaissance parameters of different tracks to obtain the VideoSAR heavy-track targeted deception strategy; Step 6: Use the 360-degree heavy track circular spotlight VideoSAR deception jamming modulation coefficient video library and the VideoSAR heavy track targeted deception strategy to generate and modulate the 360-degree heavy track circular ring VideoSAR deception signal to obtain the azimuth-elevation joint deception jamming signal forwarded track by track; Step 7: Forward the azimuth-elevation joint deception jamming signal track by track to interfere with the enemy's heavy-track circular-band VideoSAR system track by track to achieve the deception effect.

2. The 360-degree heavy track circular track annular video synthetic aperture radar jamming method according to claim 1 is characterized in that: The interception of the enemy's 360-degree heavy track circular ring VideoSAR radar signal in the first single track described in step 1 includes other parameters except the heavy track height difference and pitch angle. Other parameters include signal waveform type, carrier frequency, frequency modulation slope, pulse repetition frequency, and average speed.

3. The 360-degree heavy track circular track annular video synthetic aperture radar jamming method according to claim 1 is characterized in that: The enemy's 360-degree heavy-track circular-trace annular VideoSAR described in step 1 is carried on the enemy's spacecraft, and the radar working mode is a 360-degree heavy-track video circular-trace annular imaging mode at different altitude dimensions.

4. The 360-degree heavy track circular track annular video synthetic aperture radar jamming method according to claim 1 is characterized in that: The first single-track VideoSAR radar signal of the enemy is analyzed as described in step 2 to obtain the single-track VideoSAR signal parameters and platform motion parameters of the enemy, which are as follows: Analyze the enemy's single-track VideoSAR signal data s(t,t,x,y,i,W), and use the first single-track signal s(t,t,x,y,i,1) to generate the signal parameters and platform motion parameters corresponding to each frame, so as to guide the jammer to initially form the jamming parameters; Where t and t are the distance time and azimuth time, respectively; x and y are the azimuth and distance positions of any point in the scene, respectively; i represents the i-th frame, i = 1, 2, ..., K, K represents the total number of frames, and W is a positive integer representing the total number of repeated tracks observed by the radar at different altitudes.

5. The 360-degree heavy track circular track annular video synthetic aperture radar jamming method according to claim 4 is characterized in that: Step 3 guides the multi-track analysis based on the enemy's single-track VideoSAR signal parameters and platform motion parameters to obtain the reconnaissance parameters of different tracks, as follows: Based on the characteristics of 360-degree double-track circular-track annular VideoSAR imaging mode, other parameters except double-track height difference and pitch angle are obtained by using single-track signal parameters and platform motion parameters. For the relevant parameters of multiple re-orbit imaging flights, the altitude difference and pitch angle need to be detected and updated, while the other parameters do not need to be repeatedly detected and analyzed.

6. The 360-degree heavy track circular track annular video synthetic aperture radar jamming method according to claim 5 is characterized in that: In step 4, the false point coefficients are solved by using the 360-degree heavy track circular spotlight VideoSAR deception template of the party, and the size and direction of the video template are controlled according to the target scene requirements to obtain the 360-degree heavy track circular spotlight VideoSAR deception interference modulation coefficient video library, as follows: Step 4.1: Assume that there is an ε jammer on the ground at different positions in the large scene to interfere with the enemy system respectively. Then, the template composed of backscatter coefficients is solved by 360-degree heavy track circular spotlight VideoSAR mode imaging. for: Among them, x j and j They correspond to the azimuth and distance positions of the interference template respectively. are the positions corresponding to the azimuth of the interference template pixels, are the distances of the interference template pixels to the corresponding positions, N a and N r are the number of pixels in the azimuth and distance directions of the i-th frame template obtained after imaging, θ i is the azimuth angle of the i-th frame, is the top-down angle of the Wth track, s() represents the corresponding scattering coefficient value; Step 4.2: According to the requirements of the target scene, the video template is processed by interpolation resampling or frequency domain zero filling signal processing method. Dimensional control: in, is the image domain data of the i-th frame template obtained after imaging; is the image domain data of the i-th frame template after size control, and are the number of pixels in the azimuth and distance directions of the i-th frame template after size control; Step 4.3: Create a video template based on the target scene requirements Angle control: Among them, θ rot is the rotation angle of the video template; Step 4.4, Video template After size control and angle control, the point (x j ,y j ) to the new position The video template becomes 7. The 360-degree heavy track circular track annular video synthetic aperture radar jamming method according to claim 6 is characterized in that: The reconnaissance parameters of different orbits described in step 5 are used to generate a fast heavy-orbit multi-angle jamming strategy to obtain a VideoSAR heavy-orbit targeted deception strategy, as follows: For any ground jammer ε, the fast re-orbit multi-angle jamming signals that can be selected are: The 360-degree heavy track circular ring VideoSAR deception style is selected through the jamming strategy selection switch function Sel(·). The jamming strategies include the following four: (1) Based on the heavy orbit circular beamforming mode, the real azimuth is used And the real top-down perspective Generate a heavy orbit circular band interference signal with the same azimuth and elevation angle; (2) Based on the heavy orbit circular beamforming mode, the false azimuth is used And the real top-down perspective The generated heavy orbit circular band interference signals with different azimuth angles and the same elevation angle; (3) Based on the heavy orbit circular beamforming mode, the real azimuth is used and false top-down perspective Generate heavy orbit circular band interference signals with the same azimuth and different elevation angles; (4) Based on the heavy orbit circular beamforming mode, the false azimuth is used and false top-down perspective The generated heavy orbit circular band interference signals are of different azimuth and elevation angles.

8. The 360-degree heavy track circular track annular video synthetic aperture radar jamming method according to claim 7 is characterized in that: In step 6, the 360-degree heavy track circular spotlight VideoSAR deception jamming modulation coefficient video library and VideoSAR heavy track targeted deception strategy are used to generate and modulate the 360-degree heavy track circular ring VideoSAR deception signal to obtain the azimuth-pitch joint deception jamming signal forwarded track by track. The joint deception jamming signal includes the following four types: (1) Using the 360-degree heavy track circular spotlight VideoSAR deception jamming interference modulation coefficient video library and VideoSAR heavy track targeted deception strategy, and based on the heavy track circular spotlight mode, using the real azimuth And the real top-down perspective The generated heavy orbit circular band interference signal with the same azimuth and elevation angle is: Wherein, mod{A,B} represents the signal modulation operation of A and B; (2) Using the 360-degree heavy track circular spotlight VideoSAR deception interference modulation coefficient video library and VideoSAR heavy track targeted deception strategy, and based on the heavy track circular spotlight mode, using false azimuth And the real top-down perspective The generated heavy orbit circular band interference signals with different azimuth angles and the same elevation angle are: (3) Using the 360-degree heavy track circular spotlight VideoSAR deception jamming interference modulation coefficient video library and VideoSAR heavy track targeted deception strategy, and based on the heavy track circular spotlight mode, using the real azimuth and false top-down perspective The generated heavy orbit circular band interference signals with the same azimuth and different elevation angles are: (4) Using the 360-degree heavy track circular beamforming VideoSAR deception interference modulation coefficient video library and VideoSAR heavy track targeted deception strategy, and based on the heavy track circular beamforming mode, using false azimuth and false top-down perspective The generated heavy orbit circular band interference signals at different azimuths and elevations are:

9. The 360-degree heavy track circular track annular video synthetic aperture radar jamming method according to claim 8 is characterized in that: The azimuth-elevation joint deception jamming signal is forwarded track by track as described in step 7 to interfere with the enemy's heavy-track circular-track ring VideoSAR system track by track to achieve the deception effect, as follows: The deception jamming signals of four VideoSAR false scenes are forwarded, so that the video deception jamming and the real scene echo signals are received by the enemy VideoSAR system at the same time, and the final deception jamming imaging effect of VideoSAR on multiple different orbits and heavy orbit circular bands is achieved; The forwarding of four jamming signals and the choice between different orbits can derive multiple combinations for strategic jamming of azimuth-elevation joint deception to disrupt the enemy radar's identification of targets. For fast re-orbit interference, the interference signal is pre-modulated before the next re-orbit imaging, and only the height difference and pitch angle are updated and modulated. The other parameters do not need to be repeatedly detected and modulated.

10. A 360-degree heavy track circular video synthetic aperture radar jamming system, characterized in that: The system is used to implement the 360-degree heavy track circular track annular video synthetic aperture radar jamming method according to any one of claims 1 to 9, and the system includes a radar signal interception module, a single track analysis module, a multi-track analysis module, a modulation coefficient video library determination module, a deception strategy generation module, a deception jamming signal generation module and a jamming module, wherein: Radar signal interception module, used to intercept the enemy's 360-degree heavy track circular ring VideoSAR radar signal in the first single track; The single-track analysis module is used to analyze the enemy's first single-track VideoSAR radar signal to obtain the enemy's single-track VideoSAR signal parameters and platform motion parameters; The multi-track analysis module guides the multi-track analysis based on the enemy's single-track VideoSAR signal parameters and platform motion parameters to obtain reconnaissance parameters of different tracks; The modulation coefficient video library determination module uses the 360-degree heavy track circular spotlight VideoSAR deception template to solve the false point coefficient, and controls the size and direction of the video template according to the target scene requirements to obtain the 360-degree heavy track circular spotlight VideoSAR deception interference modulation coefficient video library; The deception strategy generation module is used to generate fast heavy-track multi-angle jamming strategies based on the reconnaissance parameters of different tracks to obtain the VideoSAR heavy-track targeted deception strategy; The deception jamming signal generation module uses the 360-degree heavy track circular spotlight VideoSAR deception jamming modulation coefficient video library and VideoSAR heavy track targeted deception strategy to generate and modulate the 360-degree heavy track circular ring VideoSAR deception signal, and obtain the azimuth-elevation joint deception jamming signal forwarded on a track-by-track basis; The jamming module forwards the azimuth-elevation joint deception jamming signal on a track-by-track basis, jamming the enemy's heavy-track circular-band VideoSAR system on a track-by-track basis to achieve a deception effect.

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