Method Study Of Anti-jamming Of Active Deception In Radar Guidance

It is an issue needed to be solved urgently that how to improve the anti-jammingability of radar system under the highly confrontational electromagnetic environment.Active deception jamming possesses so many merits that it is widely applied inmodern war, such as well-targeted jamming, high efficiency-cost ratio, operationalflexibility in live battle, strong anti-interference and so on. Consequently, currentradar system suffers huge threaten from it. So it is great significant to deploy lots ofresearch on the anti-jamming of active deception.Based on the research status at home and abroad of modern radar anti-jamming,the paper analyses the principle and produce conditions of various active deceptionjamming, and carries on the thorough discussion and the model simulation of thedistance drawing-out jamming, speed drawing-out jamming, speed-distance jointdrawing-out jamming and angle deception Jamming(including the non-coherentinterference and coherent interference).Then based on the characteristics of the fouractive deception jamming, the paper puts forward the corresponding anti-jammingmethods or jamming identification methods. At last, the feasibility and validity ofthese methods are verified by the simulation experiments.The main research work of this paper is as follows:(1)The principle of work and produce conditions of four active deceptionjamming, namely distance drawing-out jamming, speed drawing-out jamming, speed-distance joint drawing-out jamming and angle deception Jamming (includingnon-coherent interference and coherent interference) are analysised and studieddeeply, and the simulation model of them is carried out.(2)By combining angle/speed two-dimensional tracking systems andangle/distance two-dimensional tracking system, the anti-jamming algorithm ofparallel dual tracking system is proposed against distance drawing-out jamming,speed drawing-out jamming, speed-distance joint drawing-out jamming. Thesimulation results demonstrate the feasibility and effectiveness of the algorithm, andthe performance of the algorithm is analyzed qualitatively and quantitatively.(3)On the basis of the principle of monopulse angle measurement, a simulationmodel of glint is carried out. The algorithm formula and implementation process usedto estimate the Gauss-Laplace distribution model parameters by means of expectation maximization algorithm (EM algorithm) are deduced, and a detailedanalysis of its performance in terms of parameter estimation is carried out. Based onthis, the anti-angle deception Jamming discrimination algorithm based on thestatistical glint features is proposed, and simulation experiments were carried out toverify the effectiveness of the algorithm.