对新型ISAR欺骗干扰效果仿真分析

Simulation and Analysis of New Deceptive Jamming Effect on ISAR

欺骗式干扰是ISAR对抗领域的研究热点。巧妙利用线性调频脉冲串波形时延和频移间的耦合特性,引入了一种基于DRFM移频转发的新型欺骗干扰技术,并通过对传统固定、步进及随机移频干扰分布特性的研究,提出了一种对ISAR的修正移频干扰技术,完成了干扰输出结果从一到多的转变,能够满足新型欺骗式干扰"隐真示假"的现实需求。在此基础上,结合统一的移频干扰理论模型,设计实现了干扰系统理论框架,并结合典型的战情参数设置进行了仿真实验,结果表明该干扰样式不仅能够对典型军事目标形成有效保护,而且能够形成更加复杂的干扰纹理,进一步验证了干扰样式的有效性和科学性。

Deceptive jamming is a hot research topic in the area of ISAR electronic countermeasures （ECM）.By utilizing the coupling relationship between the time delay and shift frequency of linear frequency modulation（LFM）waveform,a new deceptive jamming based on shift frequency repeater mode through the unit of DRFM is introduced in this paper.Through the research on the distribution characters of the fixed shift frequency jamming,the stepped shift frequency jamming and the random shift frequency jamming,a jamming method with modified shift frequency to ISAR is proposed.The jamming output changes from one to multiple distribution,which can meet the great need of new deceptive jamming by camouflaging real tar-gets and revealing decoy.On this basis,the system framework of jammer is constructed according to the uni-form theoretical model of shift frequency jamming.Finally,the simulation test is carried out based on typical scenario and parameters configuration,the results show that the jamming can not only effectively protect typ-ical military targets,but also produce much more complex texture.The result reveals that the jamming is of high effectiveness and scientificalness.