Research on Noise Jamming to LFM Signal Radar

Linear frequency modulation(LFM) signal radar always uses pulse compression technology,which has strong ability to suppress convention noise interference.In order to counter such radar effectively,two narrowband noise jamming realization methods are proposed in this paper.With these methods,the radar signal reseived and stored by jammer and noise signal are multiplied or convolved to get the noise jamming.Then the noise jamming is magnified and transmitted.These two methods donot need to spy frequency or frequency channel off.They can aim at radar's frequency automatically and improve the utility of jamming power.The two methods have obvious advantages to traditional broadband noise suppression method。In this paper,through theoretical derivation,simulation analysis and test,it shows that these two kinds of interference method have significant effects to LFM signal radar.