Research On Reconfigurable Multi-channel Chaff Jamming Echo Signal Real-time Simulation

Radar jamming simulator is frequently used in radar system developing,which is significant for the jamming testing,performance evaluating and drill use in all phase of radar developing.Compared with the traditional method testing the capacity of resisting disturbance,jamming simulator is more feasible for its less cost and convenience.Chaff jamming is widely used since it's invented.Studying on wide band multi-channel chaff jamming echo signal is significant for developing anti-jamming radar.Based on a jamming simulator designment,three parts is proposed in this article,including real-time chaff jamming echo signal dynamic simulation,wide-band channel equalization in multi channel system and reconfigurable radar jamming simulator design based on FPGA.Firstly,the dynamic real-time simulation technology of chaff jamming signal is studied.A real-time dynamic simulation method of chaff jamming based on off-line simulation and on-line real-time synthesis is designed.Compared with the traditional chaff simulator design method,this method can simulate the diffusion process of chaff bomb dynamically.It also satisfies the real-time performance of echo synthesis process and has good application value.The experimental results show that the method can simulate the diffusion process of chaff bomb and generate real-time jamming echoes.Secondly,this paper studies the amplitude consistency compensation technology of the output signal of wide-band multi-channel simulator.On the basis of the least square method of the traditional FIR model,to process LFM signal and single frequency signal commonly used in broadband radar,a processing method based on neural network model is proposed.The in-band amplitude and phase compensation technology of multi-channel signals is realized.Compared with the traditional FIR processing model,the simulation results show that the neural network algorithm has better compensation performance.Finally,this paper studies the design of radar jamming simulator based on dynamic and static reconfiguration of FPGA.A method of convolution module design based on fine particle fusion design is proposed for common convolution tasks in radar jamming simulator.Compared with traditional design methods,reconfigurable design saves a lot of hardware resources.Compared with the conventional reconfigurable design method,the reconfigurable radar jamming simulator based on fusion convolution design has the advantage of shorter reconfiguration time.In this paper,the real-time simulation technology of multi-channel reconfigurable chaff jamming is studied.In the dynamic real-time simulation of chaff jamming signal,compared with traditional methods,the dynamic characteristics of chaff jamming can be reflected in the real-time synthetic jamming echo.In the aspect of amplitude consistency compensation of wide-band multi-channel jamming simulator,the performance of linear frequency modulation signal and single frequency signal is improved compared with traditional methods.Compared with traditional methods,the resource consumption of radar jamming simulator is reduced in reconfigurable design based on FPGA.Compared with the conventional reconfigurable design method,the reconfiguration time is reduced.The research results in this paper are of great significance to the design of high performance multi-channel chaff jamming simulator.