Research On Multi-UAV Cooperative Deceptive Jamming

Monopulse radar can obtain the angle information of the target with only one pulse echo.It has strong anti-jamming ability against traditional jamming technology and is widely used in military fields such as target tracking and missile terminal guidance.In order to improve the battlefield survivability of important military targets,the jamming of monopulse radar is a research hotspot in the field of electronic warfare.Cross-eye jamming is one of the few jamming patterns that can effectively interfere with monopulse radars.The angular scintillation effect is generated by two jamming signals,and the monopulse radar is directed to a false target to perform angle deception jamming on the monopulse radar.Compared with the traditional two-point source cross-eye jamming,the multi-loop reverse cross-eye jamming has the advantages of greater cross-eye gain and looser system parameter tolerance by increasing the degree of system freedom.However,the current domestic and foreign reverse cross-eye jamming is not perfect enough.The rotation angle of the jamming platform will change due to its own motion,jitter,or detection by radars in different directions,which will cause the reverse cross-eye jamming effect.influences.And for different jammer carrying platforms,the traditional linear array,circular array and other jamming unit arrangement methods cannot adapt to all situations,and the configuration of the jamming antenna needs to be redesigned according to the size of the platform.Based on the self-defense jamming of drone swarms through cooperative jamming,this paper proposes a paired multi-loop reverse cross-eye jamming system for drone formations,and analyzes the jamming effects under different jamming platform corners.In-depth study of the Doppler frequency difference,jamming path difference and platform reflection echo that exist in the paired multi-loop reverse cross-eye jamming in practical applications,and the paired multi-loop reverse cross-eye The jamming is combined with the distance gate drag jamming,and the distance-angle combined jamming is carried out.The specific research content and research results of this article mainly include the following parts:The first part proposes a paired multi-loop reverse cross-eye jamming system for UAV formation.The antenna configuration of the paired multi-loop reverse cross-eye jamming not only avoids the limitation of the size of the small UAV to the jamming antenna unit,and ensures the length of the jamming baseline,but also can maintain a certain jamming effect at any corner of the jamming platform,Improve the stability of reverse cross-eye jamming.On the basis of pointing out the insufficiency of the two-point source reverse cross-eye jamming system,the paired multi-loop reverse cross-eye jamming system is mathematically modeled,and the expression of the monopulse radar angle measurement error and the angle measurement error are derived.The relationship between the jammer’s rotation angle.Finally,the size and variance of the angle measurement error under different jammer rotation angles are used as the evaluation criteria to simulate the jamming performance and stability of the traditional two-point source reverse cross-eye jamming and the paired multi-loop reverse cross-eye jamming.Analysis and comparison prove the superiority of the paired multi-loop reverse cross-eye jamming system.The second part mainly studies the system parameter tolerance of the paired multi-loop reverse cross-eye jamming,and analyzes the two kinds of jamming loop differences that affect the system parameter tolerance,especially the existing analysis has never considered Doppler frequency difference of the past.The Taylor series expansion is used to mathematically derive the Doppler frequency difference and the jamming path difference between the jamming loops,and the expression of the jamming loop phase difference caused by the jamming loop difference is given.Finally,the simulation compared the parameter tolerances of the two cross-eye jamming systems when the jamming loop difference was accurately compensated.At the same time,the Doppler frequency difference and the jamming path difference between the jamming loops were simulated and the jamming was studied.The influence of the loop difference on the tolerance of system parameters.The third part mainly studies the influence of platform reflected echo on cross-eye jamming and the distance-angle combined jamming that combines paired multi-loop reverse cross-eye jamming with distance gate drag jamming in order to eliminate the effect of reflected echo.The jamming signal ratio of the paired multi-loop reverse cross-eye jamming is defined,and the influence of the total cross-eye gain on the platform echo is analyzed.Finally,the simulation experiment illustrates the influence of the jamming signal ratio on the jamming effect,and gives suggestions for the implementation of distance-gate drag jamming.