Radar Escort Jamming Cancellation Based on LMS Adaptive Filtering
The escort jamming is a common jamming method in radar countermeasure.It usually makes the radar lose its detection ability by blanketing the echo signal,so it needs to be suppressed.The escort jamming is a non-stationary random signal,in this case the least mean square(LMS)adaptive filter is used to estimate the jamming and eliminate it from the received radar signal,therefore,a method of radar jamming cancellation based on LMS adaptive filtering is presented in this paper.Firstly,the radar re-ceiving signal model is established,including the signal received by the main array antenna and the signal received by the auxiliary array,and then the principle of jamming cancellation based on LMS adaptive filter is given,it actually takes the input adaptive fil-ter of the auxiliary array receiving signal to get the estimation of the jamming on-line,subtracts this estimation from the received signal of the main array antenna to achieve the jamming cancellation,the signal-to-jamming&noise of other targets in formation is improved except that the target of radiated jamming is difficult to detect.Finally,simulation examples are given to verify the good effect of the above-mentioned jamming cancellation method.
radar countermeasureescort jammingjamming cancellationadaptive filteringleast mean square(LMS)
国家科技期刊平台
NSTL
万方数据
