Research On Electronic Countermeasures System Based On System Generator

In research of electronic countermeasure system based on field programmable gate array,design scheme of electronic countermeasure system using System Generator is proposed to speed up hardware development,improve system portability and accelerate design verification.Firstly,by analyzing and abstracting composition and structure of electronic countermeasure system,the structure of electronic countermeasure system proposed contains digital channel of multi-phase filtering and digital radio frequency memory.The design is concise and straightforward by comparing the development processing based on ISE and Modelsim.Secondly,in order to prove feasibility of design scheme,this paper applies it against SAR.A novel jamming method of the 2-D Doppler shift-frequency intermittent sampling jamming against SAR is proposed.By combining the 2-D intermittent sampling jamming and Doppler shift-frequency jamming,the intercepted radar signals are processed and sent back to the radar,and the lattice of false targets is generated at the specified location.Based on the processing of linear frequency-modulated signal,the principle of producing the lattice of false targets is emphatically analyzed.Distribution characteristics of the lattice of false targets and the reason of asymmetric amplitude are explored.Then the modulation factor of energy compensation is given.Furthermore,the limitation of the position requirement of jammer in the traditional method is reduced.The theoretical feasibility and validity of the method are proved by simulation experiments.Finally,reconnaissance algorithm and 2-D Doppler shift-frequency intermittent sampling jamming algorithm are built and deployed by System Generator.Through analysis of data produced by hardware co-simulation,results prove correctness of circuit design.Than detailed design processing shows that the design scheme can quickly generate,modify and deploy electronic countermeasure system.In addition,verification processing of the hardware development processing is simplified;system development and debugging speed are enhanced.