Influence of DRFM Frequency Shift Jamming on The LFM Pulse-compression Radar and Countermeasure Research

The frequency shift jamming based on digital radio frequency memory(DRFM) is a kind of new jamming technology aiming at some new system radars(such as the linear frequency modulation(LFM) pulse-compression radar).The jamming signal has more coherency with the radar transmitting signal,and the jamming modes are various and flexible,which accordingly makes the radar difficult to use the existing anti-jamming technologies.This paper analyzes the different from the parameters of jamming signal and target echo signal,extracts the true target echo information to confront with the frequency shift jamming.