Research And Implementation Of Radar Active Jamming Technology In Complex Electromagnetic Environment

Radar jamming in complex electromagnetic has been a hot spot in the field of electronic warfare.The electromagnetic in electronic battlefield becomes more and more complex with the emergence of new radar.The number of radar becomes more and more,the frequency range becomes wider and wider and the modulation form becomes more and more complex.This requires radar jammer has a wide range of processing bandwidth,large dynamic range,multi radar signal jamming and high-speed signal processing capabilities.Therefore,it is very important to study the radar jammer which can deal with the complex electromagnetic environment.This paper studies deeply the active jamming of radar in the complex electromagnetic environment and proposes the jamming transmitter timing model and interrupted-sampling and overlay repeater jamming technology for complex electromagnetic environment.A lot of simulation results are given,and the effectiveness of the algorithm is verified by FPGA.Firstly,the basic principle of radar active jamming technology is studied,and the influence of complex electromagnetic environment on radar jamming is analyzed in detail.The jamming sending and receiving mode of “interrupted-sampling within the pulse add fixed forwarding add side window side reconnaissance” and the jamming mode of radar cooperative networking are proposed,so the pulse loss caused by multi target reconnaissance jamming is reduced.Then,radar delay stack jamming technology based on DRFM and the radar interrupted-sampling and repeating jamming technology are analyzed in detail.radar interrupted-sampling and overlay repeater jamming model is proposed based on superposition.Through a large number of simulation,the jamming technology can make the jammer produce more false targets,more flexible position and more jamming distance.Next,the implementation scheme of radar active jamming digital system in the complex electromagnetic environment is introduced.The main function of jammer system model and hardware structure are introduced in detail,and the pulse interrupted-sampling system model,parameter measurement and jammer timing are realized by FPGA.Finally,the hardware resource usage of the system is given and the hardware platform is tested completely,and the test results of signal jammer and multi jammer are given.The test results show that the jammer system not only has the ability of dealing with wide bandwidth,large dynamic range and multi radar signal jamming in complex electromagnetic environment,but also has many jamming patterns.