Research On Random Pulse Radar Signal Processing Algorithm And Anti-interference Performanc

Electronic warfare has become an important part of modern warfare,and there is an urgent need to improve the anti-jamming performance of radar.Random pulse radar uses detection pulses with random intervals,which is an effective measure against digital storage forward interference.In this paper,the signal processing algorithm based on random pulse and anti-jamming performance are studied under the background of scientific research projects.The main work of this paper is as follows:A random pulse echo signal model is established.Six random pulse signal processing algorithms,NUDFT,NUFFT,IAA,CS,WBI based on interpolation recovery and adaptive WBI,are analyzed in detail.The side lobe suppression performance,clutter suppression performance,target detection performance,ranging and velocity ambiguity performance and computational complexity of the algorithms are simulated and compared in detail.For IAA algorithm,an algorithm for solving distance ambiguity is presented.The simulation results verify the effectiveness of the algorithm.According to the hardware environment,the selection of WBI algorithm is determined for further study.In this paper,the selection of randomization degree parameter and B parameter of pulse interval is deeply simulated and analyzed,and a reasonable selection scheme is given.On the basis of in-depth study on the working mechanism of WBI algorithm,an improved interpolation EWBI algorithm is proposed.The simulation results show that the sidelobe suppression performance near the target of EWBI algorithm is better than that of WBI algorithm,and the target detection performance is significantly improved than that of WBI method,and it can be used to resolve ambiguity in the case of single and multiple targets.The suppression capabilities of distance deception interference,multiple false targets interference and smart noise interference of WBI and EWBI algorithms are simulated and compared.For distance deception interference,an improved method of using small values for B near the target and large values for B elsewhere is proposed.The simulation results of WBI and EWBI show that: The improved B parameter selection method greatly improves the ability to suppress distance deception interference.The hardware implementation of WBI and EWBI algorithms is studied.The WBI and EWBI signal processing modules are successfully transplanted to the DSP board 6678 processor of the radar signal processor.The processing results show that the results of the operations on the DSP hardware platform are consistent with the results of the simulation environment.Finally,the anti-distance deception interference module is also transplanted.