Research On Fast Synthesizing Technique Of Barrage Jamming Based On DJS

The electronic war is playing more and more important role in the modern war. The electronic jamming is one of the important techniques in the filed of the electronic countermeasure. This thesis focuses on simulation on the technique of radar jamming, and discusses the electronic countermeasure(ECM) techniques in the radar system and focuses on how to generate the ECM signals quickly by Digital Jamming Synthesis(DJS) in interference of suppression. Base on advantages and disadvantages between DJS and DRFM, this thesis focuses on the analysis of these two kinds of technology in the application of electronic counter.The thesis focuses on suppressing jamming. Firstly, according to the basic principle of the jamming of suppression, this thesis discusses the best suppressing jamming signal, radio noise, which has the same frequency and bandwidth with the radar signal. In the second part, the emphasis is played on research of the radio noise, amplitude modulation and frequency modulation. The thesis discusses the production of such kinds of jamming signals, also makes some simulations. According to the results of simulation, this thesis analyzes these facts which influence the effects of the jamming signal.This thesis analyzes the principle and combination of the Digital Jamming Synthesis from the viewpoint of electronic counter, and highlights the problems of using the digital up-conversion in DJS, and also brings forward corresponding solutions. Considering the characteristics of the LFM(Linear frequency modulated) signal, this thesis describes the effects on the LFM signal of traditional radio noise, radio noise based, coherent and non-coherent radio noise on Digital Jamming Synthesis, and simulation is given to illustrate rightness of theoretical analysis.