Study Of Distance Deception Jamming Counter-Counter Measures And Implement Based On Jammer’s Character

Distance deception jamming is an active deception jamming generated by jammer, it is widely used in modern electronic warfare for simply production process and good interference effect. While the existing radar has some anti-jamming measures, it often can not achieve good results when used on distance deception jamming, thus the study of distance deception jamming anti-jamming is very necessary. In this thesis, based on the nonlinear effects of each module of jammer, the distance deception jamming is studied. Based on power amplifier’s Volterra series model, distance deception jamming is modeled. On the other hand, its identification and suppression method are studied.The main work is as follows:1. Based on the workflow of DRFM jammer and the analysis of the principle of generating distance deception jamming, the nonlinear effects of jammer modules in the generating of distance deception jamming are studied. Except the influence of power amplifier, other modules could be negligible. Then under power amplifier’s Volterral series model,the model of single distance deception jamming and intermittent sampling repeater interference are built and its features in this model are analyzed.2. For the problem of distance deception jamming detection, based on the similarity between the signal of radar and distance deception jamming, cone theory and signal similarity theory are studied. Both methods are simulated.3. Distance deception jamming’s identification problem is studied and achieved in the software platform. For a single distance deception jamming, the segmentation autocorrelation maximum variance, the complexity of time-series and the degree of similarity of the spectrum are studied. All the methods are simulated. For intermittent sampling repeater interference, firstly,its own characteristics and carrying fingerprint feature of jammer are studied.Then,studied and simulated its identification method in the use of joint feature.4. Distance deception jamming’s suppression is studied and achieved in the software platform. For a single distance deception jamming, the time-frequency decoupling suppression method is studied. For intermittent sampling repeater interference, the atomic decomposition suppression method is studied. Suppression effects of the two methods are simulated.