Research On Unmanned Carrier Cooperative Jamming Strategy And Technology For Radar Network

After World War II,the penetration at medium and high altitudes became the main means for countries to launch military attacks.As an important link in the air defense system,guidance radar is a high threat to the penetration formations due to its full control of missile systems.In order to better adapt to the needs of modern high-tech battlefield,guidance radars are mostly networked to improve their detection range and tracking accuracy of targets.In the face of the advantages of radar networking,the jamming side uses and cooperative jamming to counteract it.Cooperative jamming is mainly through the organic cooperation of multiple jammers,the reasonable allocation of jamming resources,and the selection of appropriate jamming methods to maximize the effect of jamming.This thesis discusses the jamming strategies and techniques for the collaborative process,and the main work is as follows:1.The workflow of the guidance radar and the way the radar is networked are introduced,and its weaknesses are analyzed at three levels: system,data and signal,and it is concluded that communication jamming,false track spoofing and jamming signals with high correlation with radar signals can be used against the guidance radar system.2.For the development of cooperative jamming strategy,this thesis discusses the allocation of jamming resources in the process of cooperative operations.Starting from the detection link of radar,the formula of radar detection probability in jamming environment is given,and the effects of different jamming on detection probability are discussed in four aspects: time,frequency,space and pulse pressure gain;based on the detection probability of single radar,the objective function is constructed with the detection probability of radar network,and the optimized particle swarm algorithm is used to solve the problem in the case of complete radar information,which results in faster and more stable algorithm convergence;in the case of incomplete radar information,the algorithm is solved by the WPA after completing the radar information to ensure the effectiveness of the jamming strategy.3.For the cooperative jamming technique,three aspects are discussed,namely,suppression jamming,deception jamming and composite jamming.For suppression jamming,the mathematical model of segmented forwarding signal is analyzed,and the improvement idea of non-uniform segmentation is proposed to improve the antiidentification of jamming signal,and the effect of dense false target suppression is given by simulation after the cooperation of multiple machines from quantitative and energy domains,and the influence of uncertainty error in energy domain synthesis is analyzed;for spoofing trajectory jamming,the mathematical model of false trajectory jamming is given,and the influence of false trajectory error on false trajectory is analyzed.Finally,two composite jamming methods combining suppression and deception are proposed,and the feasibility of the methods is demonstrated by simulating the jamming effect.