Research On Interrupted Sampling Repeater Coherent Jamming

Interrupted sampling repeater jamming can generate coherent false targets and effectively interfere with the enemy radar system by undersampling the received signals and using the characteristics of the matched filtering of the pulse compression radar The intermittent sampling interference signal has a relatively low sampling rate,short sampling and forwarding interval,fast response speed of the jammer,flexible modulation of the signal,flexible forwarding mode,and the ability to use and receive the public antenna,which is easy to implement in engineering.Intermittent sampling interference has many advantages such as the above mentioned interference.As a new type of coherent jamming,it has wide application and good prospects for development.This paper analyzes and verifies the effects of intermittent sampling interference of the LFM radar signal,the phase-encoded signal,and the multi-carrier phase-coded signal,which are commonly used in wideband radar,by setting different interference parameters,such as sampling duty cycle and forwarding pattern.Analyze and study the effects of intermittent sampling and interference of different transmission signals.Finally,by setting specific scenes,the entire radar information processing flow is simulated and modeled,and the interference effects after intermittent sampling are analyzed and verified,mainly from the following aspects.:1.First study the basic principle of intermittent sampling and forwarding interference,establish an intermittent sampling interference model,analyze the characteristics of the sampling signal,and list three commonly used forwarding methods;2.Study the interference effects of the intermittent sampling of LFM signals,phase-coded signals,and phase-frequency composite coded signals,and change the parameters of the interference,including the forwarding method,sampling duty cycle,etc.,and longitudinally contrast the interference of different emission signals.After the effect;3.By constructing the real radar simulation platform,the interrupted sampling repeater jamming is applied to the self-defense jamming scene and the team support jamming scene.Then we analyze and verify the jamming effect after the interrupted sampling repeater jamming,and analyze the influence of the interrupted sampling repeater jamming on different detectors.