Research And Implementation Of Radar Advanced Jamming Technology Based On FPGA

Since the new system radar using coherent radar technology was widely applied to radar electronic warfare,higher requirements have been proposed to the radar jamming technology.If the jamming signal does not have coherence with radar signal,high coherent processing gain through matched filter won't be get on the radar receiver.So good interference effect wont't be reached.Digital radio frequency memory(DRFM)can sample the radar signal without distortion,storage it,process it,transmit it,and get the jamming signal which has oherence with radar signal.So it is widely used in jamming machine.However,there is a processing time delay produced by the traditional jamming method based on DRFM.Therefore,the jamming signal produced by traditional signal jammer which is based on DRFM technology will lag behind the target echo signal,jamming will have no effect on the radar using anti-jamming technology.To solve this problem,based on the DRFM technology and the interrupted sampling method,a new type of radar advanced jamming method is proposed.Firstly,radar jamming basic theories of radar advanced jamming system are expounded,including radar reconnaissance technology,pulse leading tracking technique,DRFM technology and radar jamming methods.Secondly,based on the analysis of interrupted sampling direct repeater jamming and interrupted sampling cyclic repeater jamming,the radar advanced jamming method based on full-pulse storage repeater and the radar advanced jamming method based on interrupted sampling repeater jamming are put forward.Multiple false targets generated by the the radar advanced jamming method based on full-pulse storage repeater are the same as the target echo signal,acheiving radar advanced jamming and solving the problem that the traditional repeater jamming signal lags behind the target echo.But there are some problems of this method that the jamming signal isn't produced within the pulse and reconnaissance delay.On this basis,the method of radar advanced jamming based on interrupted sampling repeater jamming is put forward.False target group generated by the the radar advanced jamming method based on interrupted sampling repeater repeater are the same as the target echo signal.This method can not only produce jamming signal within the pulse,but also solve the problem of pulse reconnaissance delay.Based on the former two kinds of radar advanced jamming method,radar advanced jamming methods under the multi radar environment are proposed,including the method of radar advanced jamming based on pulse storage repeater under the multi radar environment,the method of radar advanced jamming based on interrupted sampling repeater under the multi radar environment,and the improved method of radar advanced jamming based on interrupted sampling repeater under the multi radar environment.On the basis of the radar advanced jamming,the suppress jamming effect and deception jamming effect are achieved.And the methods are verified by MATLAB.Finally,the realization of the radar jamming system is introduced,including the design of overall framework,hardware platform and software algorithm.By detailed analysing the specific functions of radar advanced jamming system,the corresponding hardware circuit and software work sequence are designed.The system is simulated with ModelSim simulation software.And the hardware platform is tested by the test equipment,proving the feasibility and stability of the system.