基于合成等效微动点的ISAR干扰新方法  

A Novel Method of ISAR Jamming Based on Synthesizing Equivalent Micro-motion Point

作　　者：祝本玉[1] 薛磊[1] 毕大平[1] 

机构地区：[1]电子工程学院电子系,合肥230037

出　　处：《现代雷达》2011年第1期33-36,共4页Modern Radar

摘　　要：根据目标微动产生的微多普勒谱会影响逆合成孔径雷达(ISAR)成像的特点,提出了基于合成等效微动点的ISAR干扰方法。该方法通过对截获的雷达发射信号在慢时间域进行正弦相位调制,得到了等效微动点的回波信号。该信号被作为干扰信号转发至ISAR,经ISAR接收处理后得到了与真实微动点一致的微多普勒谱,从而实现了对ISAR的有效干扰。文中详细分析了该干扰方法对ISAR成像的影响,讨论了干扰信号关键参数与干扰效果的关系,研究结果表明该干扰方法可以根据干扰参数的不同对ISAR产生多种干扰效果,是一种干扰ISAR成像的有效手段。最后,计算机仿真实验验证了该方法的有效性。Based on the characteristic of micro-doppler which produced by micro-motion target may affect ISAR imaging, a novel ISAR jamming method based on synthesizing equivalent micro-motion point is presented in this paper. In this method, the echo of the synthesized equivalent micro-motion point is obtained by modulating the phase of intercepted radar signal with sinusoid in the slow time. The sinusoidat phase modulated signal is regarded as the jamming signal and is transmitted to ISAR, The micro-doppler of the jamming signal is got after ISAR processing, which is same with that produced by the true micro-motion point, and the aim of effectively jamming ISAR is achieved. The image result of ISAR with jamming signal is analyzed in detail, and the relationship between the key parameters of jamming signal and jamming effect is discussed in this paper. Changing the parameters of jamming signal, several jamming effects can be realized by this jamming method, which is showed by research results. So it is an effective means for jamming the ISAR imaging. Finally, the validity of the jamming method is justified by simulation experiment.

关 键 词：逆合成孔径雷达 干扰 微动 微多普勒 

分 类 号：TN958[电子电信—信号与信息处理]