CN-122017751-A - Target spoofing jamming method, device and storage medium

CN122017751ACN 122017751 ACN122017751 ACN 122017751ACN-122017751-A

Abstract

The invention provides a target spoofing interference method, a target spoofing interference device and a storage medium, which belong to the technical field of radar countermeasure, wherein the method comprises the steps of obtaining SAR radar signal data from radar reconnaissance equipment; and carrying out interference signal analysis on the SAR radar signal data and all the false motion target data to obtain target deception interference signals, and radiating the target deception interference signals through an antenna. The invention can form realistic moving target deception under the scene, and can lead SAR-GMTI to process the target quantity on the misjudgment road, realize deception jamming of SAR-GMTI, and improve the accuracy of SAR-GMTI deception jamming.

Inventors

LI MING
LIU CHUNQUAN
TANG WEN
LUO XIAOKE
LIANG LEI
Mo Chengjian
LIU HAILIANG
SHI ZHIXUN

Assignees

桂林长海发展有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260126

Claims (10)

1. A method of targeted fraud jamming comprising the steps of: SAR radar signal data are obtained from radar reconnaissance equipment; Performing false motion target analysis on the SAR radar signal data to obtain a plurality of false motion target data; and carrying out interference signal analysis on the SAR radar signal data and all the false motion target data to obtain a target spoofing interference signal, and radiating the target spoofing interference signal through an antenna.
2. The target spoofing jamming method of claim 1, wherein the SAR radar signal data includes a pitch angle and an azimuth angle; The process of performing false motion target analysis on the SAR radar signal data to obtain a plurality of false motion target data comprises the following steps: constructing a false motion target coordinate matrix through a first formula, wherein the first formula is; , Wherein, the For a false motion object coordinate matrix, Is the first The coordinates of the spurious moving object corresponding to the individual spurious moving objects, Is the first The azimuth coordinates of the false moving object corresponding to the false moving object, Is the first The spurious motion target distance corresponding to the spurious motion target is coordinates, Is the number of false moving objects; leading in a target included angle and a speed vector corresponding to each false motion target, wherein the target included angle is an included angle between the road direction and the horizontal direction; Calculating the target included angle, the pitch angle, the azimuth angle and the velocity vectors corresponding to the false moving targets respectively through a second formula to obtain the distance velocity corresponding to the false moving targets, wherein the second formula is as follows: , Wherein, the Is the first The distance velocity corresponding to the individual spurious motion targets, Is the first The velocity vector corresponding to the individual spurious motion target, For the purpose of the included angle of the object, For the azimuth angle, Is a pitch angle; Calculating the target included angle, the pitch angle, the azimuth angle and the speed vectors corresponding to the false moving targets respectively through a third formula to obtain azimuth speeds corresponding to the false moving targets, wherein the false moving target data comprises the false moving target coordinates, the distance speeds and the azimuth speeds, and the third formula is as follows: , Wherein, the Is the first The azimuth speed corresponding to the false moving object, Is the first The velocity vector corresponding to the individual spurious motion target, For the purpose of the included angle of the object, For the azimuth angle, Is the pitch angle.
3. The method of claim 2, wherein the SAR radar signal data further comprises an initial range estimate and an imaging platform speed estimate, the SAR radar signal data further comprises a radar signal tone frequency, and the process of performing the interference signal analysis on the SAR radar signal data and all the spurious motion target data to obtain the target spoofing interference signal comprises: Leading in an jammer coordinate, wherein the jammer coordinate comprises a jammer azimuth coordinate and a jammer distance coordinate; calculating the distance coordinate of the jammer and the distance coordinate of each false moving object respectively through a fourth formula to obtain distance delay quantity corresponding to each false moving object, wherein the fourth formula is as follows: , Wherein, the Is the first The corresponding distance delay amount of the false moving object, Is the first The spurious motion target distance corresponding to the spurious motion target is coordinates, For the range-wise co-ordinates of the jammer, Is the speed of light; Calculating the azimuth coordinate of the jammer, the initial slant distance estimated value and the azimuth coordinate of each false moving target by a fifth formula to obtain azimuth modulation quantity corresponding to each false moving target, wherein the fifth formula is as follows: , Wherein, the Is the first The amount of azimuth modulation corresponding to the false moving object, Is the first The azimuth coordinates of the false moving object corresponding to the false moving object, In order to interfere with the azimuth coordinates of the machine, As a function of the wavelength(s), An initial pitch estimate; The initial slant distance estimated value, the radar signal modulation frequency, the imaging airborne platform speed estimated value, each distance velocity, the azimuth velocity corresponding to each false motion target, the distance delay amount corresponding to each false motion target and the azimuth modulation amount corresponding to each false motion target are respectively subjected to modulation coefficient calculation to obtain a modulation coefficient set corresponding to each false motion target; And calculating interference signals of all the distance delay amounts, all the azimuth modulation amounts and all the modulation factor sets to obtain target deception interference signals.
4. The target spoofing jamming method of claim 3, wherein the step of calculating the modulation factor for the initial slope distance estimate, the radar signal tone frequency, the imaging airborne platform speed estimate, each of the range speeds, the azimuth speeds corresponding to each of the spurious motion targets, the range delay amounts corresponding to each of the spurious motion targets, and the azimuth modulation amounts corresponding to each of the spurious motion targets, respectively, comprises: Calculating the initial slant distance estimated value, the radar signal modulation frequency, each distance velocity, the azimuth velocity corresponding to each false motion target, the distance delay amount corresponding to each false motion target and the azimuth modulation amount corresponding to each false motion target respectively through a sixth formula to obtain a first modulation coefficient corresponding to each false motion target, wherein the sixth formula is as follows: , Wherein, the Is the first A first modulation factor corresponding to the spurious motion target, As a function of the wavelength(s), For the purpose of modulating the frequency of the radar signal, Is the first The azimuth coordinates of the false moving object corresponding to the false moving object, Is the first The distance velocity corresponding to the individual spurious motion targets, Is the first The spurious motion target distance corresponding to the spurious motion target is coordinates, Is the first The azimuth speed corresponding to the false moving object, An initial pitch estimate; Calculating the initial slant distance estimated value, the imaging airborne platform speed estimated value, the distance delay amount corresponding to each false motion target and the azimuth modulation amount corresponding to each false motion target respectively through a seventh formula to obtain a second modulation coefficient corresponding to each false motion target, wherein the seventh formula is as follows: , Wherein, the Is the first A second modulation factor corresponding to the spurious motion target, As a function of the wavelength(s), Is the first The distance velocity corresponding to the individual spurious motion targets, For imaging the speed estimate of the airborne platform, Is the first The azimuth speed corresponding to the false moving object, An initial pitch estimate; Calculating the initial slant distance estimated value, the radar signal modulation frequency, the imaging airborne platform speed estimated value, each distance velocity, the azimuth velocity corresponding to each false motion target, the distance delay amount corresponding to each false motion target and the azimuth modulation amount corresponding to each false motion target respectively through an eighth formula to obtain a third modulation coefficient corresponding to each false motion target, wherein the modulation coefficient group comprises the first modulation coefficient, the second modulation coefficient and the third modulation coefficient, and the eighth formula is that: , Wherein, the Is the first A third modulation factor corresponding to the spurious motion target, For the purpose of modulating the frequency of the radar signal, Is the first The azimuth coordinates of the false moving object corresponding to the false moving object, Is the first The distance velocity corresponding to the individual spurious motion targets, Is the first The spurious motion target distance corresponding to the spurious motion target is coordinates, Is the first The azimuth speed corresponding to the false moving object, For imaging the speed estimate of the airborne platform, Is the initial pitch estimate.
5. The method of claim 4, wherein the step of calculating the interference signal for all the distance delays, all the azimuth modulations, and all the modulation factor sets to obtain the target spoofing interference signal comprises: Introducing distance fast time, azimuth slow time and interference signal amplitude corresponding to each false motion target, and calculating the distance fast time, the azimuth slow time, all distance delay amounts, all azimuth modulation amounts and all modulation factor groups by a ninth formula to obtain target deceptive interference signals, wherein the ninth formula is as follows: , Wherein, the The jamming signal is spoofed for the target, For the number of spurious moving objects, Is the first The amplitude of the interfering signal corresponding to the individual spurious motion targets, As a function of the modulation, In order to be a distance-wise fast time, For the azimuth slow time period, Is the first The corresponding distance delay amount of the false moving object, Is the first The amount of azimuth modulation corresponding to the false moving object, In the form of a phase modulation term, In units of imaginary numbers, Is the first A first modulation factor corresponding to the spurious motion target, Is the first A second modulation factor corresponding to the spurious motion target, Is the first And a third modulation factor corresponding to the false motion target.
6. A target spoofing jamming device, comprising: The data acquisition module is used for acquiring SAR radar signal data from the radar reconnaissance equipment; The target analysis module is used for carrying out false motion target analysis on the SAR radar signal data to obtain a plurality of false motion target data; And the interference signal analysis module is used for carrying out interference signal analysis on the SAR radar signal data and all the false motion target data to obtain a target deception interference signal, and radiating the target deception interference signal through an antenna.
7. The target spoofing jamming device of claim 6, wherein the SAR radar signal data includes a pitch angle and an azimuth angle; the target analysis module is specifically configured to: constructing a false motion target coordinate matrix through a first formula, wherein the first formula is; , Wherein, the For a false motion object coordinate matrix, Is the first The coordinates of the spurious moving object corresponding to the individual spurious moving objects, Is the first The azimuth coordinates of the false moving object corresponding to the false moving object, Is the first The spurious motion target distance corresponding to the spurious motion target is coordinates, Is the number of false moving objects; leading in a target included angle and a speed vector corresponding to each false motion target, wherein the target included angle is an included angle between the road direction and the horizontal direction; Calculating the target included angle, the pitch angle, the azimuth angle and the velocity vectors corresponding to the false moving targets respectively through a second formula to obtain the distance velocity corresponding to the false moving targets, wherein the second formula is as follows: , Wherein, the Is the first The distance velocity corresponding to the individual spurious motion targets, Is the first The velocity vector corresponding to the individual spurious motion target, For the purpose of the included angle of the object, For the azimuth angle, Is a pitch angle; Calculating the target included angle, the pitch angle, the azimuth angle and the speed vectors corresponding to the false moving targets respectively through a third formula to obtain azimuth speeds corresponding to the false moving targets, wherein the false moving target data comprises the false moving target coordinates, the distance speeds and the azimuth speeds, and the third formula is as follows: , Wherein, the Is the first The azimuth speed corresponding to the false moving object, Is the first The velocity vector corresponding to the individual spurious motion target, For the purpose of the included angle of the object, For the azimuth angle, Is the pitch angle.
8. The target spoofing jamming device of claim 7, wherein the SAR radar signal data further comprises an initial range estimate and an imaging airborne platform speed estimate, the SAR radar signal data further comprises a radar signal tone, and the jamming signal analysis module is specifically configured to: Leading in an jammer coordinate, wherein the jammer coordinate comprises a jammer azimuth coordinate and a jammer distance coordinate; calculating the distance coordinate of the jammer and the distance coordinate of each false moving object respectively through a fourth formula to obtain distance delay quantity corresponding to each false moving object, wherein the fourth formula is as follows: , Wherein, the Is the first The corresponding distance delay amount of the false moving object, Is the first The spurious motion target distance corresponding to the spurious motion target is coordinates, For the range-wise co-ordinates of the jammer, Is the speed of light; Calculating the azimuth coordinate of the jammer, the initial slant distance estimated value and the azimuth coordinate of each false moving target by a fifth formula to obtain azimuth modulation quantity corresponding to each false moving target, wherein the fifth formula is as follows: , Wherein, the Is the first The amount of azimuth modulation corresponding to the false moving object, Is the first The azimuth coordinates of the false moving object corresponding to the false moving object, In order to interfere with the azimuth coordinates of the machine, As a function of the wavelength(s), An initial pitch estimate; The initial slant distance estimated value, the radar signal modulation frequency, the imaging airborne platform speed estimated value, each distance velocity, the azimuth velocity corresponding to each false motion target, the distance delay amount corresponding to each false motion target and the azimuth modulation amount corresponding to each false motion target are respectively subjected to modulation coefficient calculation to obtain a modulation coefficient set corresponding to each false motion target; And calculating interference signals of all the distance delay amounts, all the azimuth modulation amounts and all the modulation factor sets to obtain target deception interference signals.
9. A target spoofing jamming device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the target spoofing jamming method of any of claims 1 to 5 is implemented when the processor executes the computer program.
10. A computer readable storage medium storing a computer program, characterized in that the target spoofing method of any one of claims 1 to 5 is implemented when the computer program is executed by a processor.

Description

Target spoofing jamming method, device and storage medium Technical Field The invention mainly relates to the technical field of radar countermeasure, in particular to a target spoofing interference method, a target spoofing interference device and a storage medium. Background Currently, airborne Synthetic Aperture Radar (SAR) has been widely used in the military and civilian fields. Through a multichannel imaging approach, airborne SAR can realize detection of ground moving targets. The airborne SAR-GMTI is an important development trend of battlefield reconnaissance and situation awareness technology, and a more comprehensive and detailed battlefield situation map can be obtained. The development and wide application of the airborne SAR-GMTI system form a great threat to important military targets on the ground, particularly military deployment, combat state, battlefield viability and the like of moving targets such as armored vehicles, tanks, missile launching vehicles and the like. The interference technology for SAR-GMTI needs to meet the basic requirements of resisting two working modes of SAR and GMTI. At present, the report layer of SAR interference in domestic and foreign documents is endless, but few report is published about SAR-GMTI interference technology. The current algorithms do not take into account the interference effect and the countermeasure performance analysis for SAR-GMTI, in particular for GMTI processing, in a targeted manner. The current 3-channel SAR-GMTI technology is widely applied to an airborne SAR radar system, meanwhile, as the motion rule of a ground moving target is very complex, uniform motion is the most typical and representative motion rule, and how to form a moving false target is a difficulty of the current SAR-GMTI interference. Disclosure of Invention The invention aims to solve the technical problem of providing a target spoofing interference method, a target spoofing interference device and a storage medium aiming at the defects of the prior art. The technical scheme for solving the technical problems is as follows, the target spoofing interference method comprises the following steps: SAR radar signal data are obtained from radar reconnaissance equipment; Performing false motion target analysis on the SAR radar signal data to obtain a plurality of false motion target data; and carrying out interference signal analysis on the SAR radar signal data and all the false motion target data to obtain a target spoofing interference signal, and radiating the target spoofing interference signal through an antenna. The other technical scheme for solving the technical problems is as follows, namely a target spoofing interference device comprises: The data acquisition module is used for acquiring SAR radar signal data from the radar reconnaissance equipment; The target analysis module is used for carrying out false motion target analysis on the SAR radar signal data to obtain a plurality of false motion target data; And the interference signal analysis module is used for carrying out interference signal analysis on the SAR radar signal data and all the false motion target data to obtain a target deception interference signal, and radiating the target deception interference signal through an antenna. Based on the target spoofing jamming method, the invention further provides a target spoofing jamming system. Another technical solution of the present invention for solving the above technical problems is that a target spoofing jamming system includes a memory, a processor, and a computer program stored in the memory and executable on the processor, which when executed by the processor, implements the target spoofing jamming method as described above. Based on the above-mentioned object spoofing jamming method, the invention further provides a computer readable storage medium. Another technical solution of the present invention to solve the above technical problem is a computer-readable storage medium storing a computer program which, when executed by a processor, implements the target spoofing interference method as described above. The SAR-GMTI deception interference detection method has the advantages that SAR radar signal data are obtained from radar reconnaissance equipment, false moving targets of the SAR radar signal data are analyzed to obtain false moving target data, interference signals of the SAR radar signal data and the false moving target data are analyzed to obtain target deception interference signals, the target deception interference signals are radiated through an antenna, realistic moving target deception under a scene can be formed, the SAR-GMTI can process the number of targets on a misjudgment road, deception interference to the SAR-GMTI is achieved, and accuracy of the SAR-GMTI deception interference is improved. Drawings Fig. 1 is a schematic flow chart of a target spoofing interference method according to an embodiment of the present invention; Fig. 2