Research On Design And Implementation Of Jamming Subsystem In Wideband Jamming Simulator

Wideband jamming simulator is often used to simulate the specific electromagnetic environment,which usually includes radar reconnaissance subsystem and jamming subsystem.The reconnaissance subsystem obtains the electromagnetic environment parameters in real time and guides the jamming subsystem to generate jamming efficiently.With the development of radar technology,the performance requirements of radar equipment in complex electromagnetic environment are increasing.Wideband jamming simulator can produce a variety of typical jamming patterns,automatically detect and jam radar signals,and can be used to test the performance of radar equipment,which can improve the operating level of radar equipment in complex electromagnetic environment.In this thesis,the design and implementation of the jamming subsystem of the wideband jamming simulator are studied to further improve the real-time generation ability of the jamming,reduce the consumption of hardware resources,active jamming and generation under specific conditions.The main work and contribution of this thesis are as follows:1.Based on existing hardware resources,the design of jamming subsystem in wideband jamming simulator is further improved.This thesis studies the radar active jamming strategy,analyzes the factors that affect the jamming effect,the characteristics of different jamming patterns and the influence of radar working mode on the jamming strategy,and analyzes the shortcomings of the existing jamming subsystem design.2.Aiming at the jamming problem of narrow pulse signal,based on digital radio frequency memory,two methods of fast frequency guidance strategy + cross cycle jamming and cyclic forwarding jamming are studied,and the implementation architecture and efficient implementation method are given.3.Aiming at the jamming problem of long pulse width LFM signal,the jamming methods based on dechirp and inverse dechirp processing are studied,and the implementation architecture and parallel efficient implementation method are given.4.Aiming at the problems of low flexibility and high resource consumption in the implementation of wideband blanket jamming,the method of multiple narrowband synthesis and adjustable bandwidth blanket jamming based on DDS is studied,and the implementation architecture and efficient implementation method are given.5.Based on FPGA hardware platform,the design of jamming subsystem and the efficient implementation of multi-mode blanket and deceptive jamming are improved.The system testing and reconnaissance subsystem joint test results show that the system runs stably and has complete functions.