基于多干扰机协同的极化SAR干扰方法  

A Multi-Jammer Cooperating Jamming Method Against Polarimetric SAR

作　　者：纪朋徽 邢世其[1] 代大海[1] 庞礴[1] 冯德军[1] JI Penghui;XING Shiqi;DAI Dahai;PANG Bo;FENG Dejun(College of Electronic Science and Technology,National University of Defense Technology,Changsha,Hunan 410037,China)

机构地区：[1]国防科技大学电子科学学院,湖南长沙410073

出　　处：《信号处理》2024年第5期907-921,共15页Journal of Signal Processing

基　　金：国家自然科学基金(61971429,61901499)。

摘　　要：针对单极化干扰机生成的干扰会被极化合成孔径雷达(SAR)鉴别和对消的问题,本文提出了一种基于多干扰机协同的极化SAR干扰方法。该方法在不改变现有干扰机单极化发射结构的基础上,通过时序协同不同位置的多个单极化干扰机,实现对极化SAR的干扰。具体来说,根据极化SAR抗压制和欺骗干扰处理方式的不同,该方法利用不同位置的多个单极化干扰机同时发射,使极化SAR无法准确估计出干扰机发射天线极化比,从而无法对消压制干扰,实现压制干扰的目的;使用不同位置的多个单极化干扰机交替发射,有效破坏相邻两个接收脉冲之间的相关性,使极化SAR无法实现假目标对消,从而实现对极化SAR欺骗干扰的目的,并且多部单极化干扰机交替发射也能实现方位向间歇采样的干扰效果,增加欺骗干扰生成虚假目标的复杂性。由于实际应用中不需要改变现有单极化干扰机发射结构,该文所提方法为实现对极化SAR干扰带来了便利。并且该方法在生成压制和欺骗干扰时均使用模板调制干扰方式,通过简单的模板修改就能实现可控的压制和欺骗干扰效果。文中首先分析了极化SAR抗压制和欺骗干扰的方法,然后分别给出了多干扰机生成压制和欺骗干扰的时序协同方式,最后以模板调制干扰为基础具体分析了多干扰机协同生成干扰的方法,并分析了多干扰机的布局和干扰机数量选取准则。理论推导和仿真实验证明了本文方法能够实现对极化SAR的干扰。Single-polarization synthetic aperture radar(SAR)jammers can achieve effective jamming against conventional SAR.When used against polarized SAR,the jamming performance of existing single-polarization jammers is significantly reduced.In some scenarios,the jamming is completely removed,preventing the effective functioning of jammers.This is because polarized SAR can utilize signals received from multiple polarization channels to employ polarization cancellation processing techniques to cancel out the suppression or deception jamming generated by single-polarization jammers.To prevent the jamming generated by single-polarization jammers from being identified and canceled by polarimetric SAR,this article proposes a polarization SAR jamming method based on the cooperative action of multiple jammers.Specifically,this method leverages the cooperative action of multiple single-polarization jammers placed at different positions and transmitting simultaneously.This makes it challenging for polarization SAR to accurately estimate the polarization ratio of the transmitting antennas of the jammer,thereby preventing the cancellation of suppression jamming and achieving the intended suppression jamming effect.By having multiple single-polarization jammers at different positions and alternate transmissions,the method effectively disrupts the correlation between adjacent receive pulses.This provides difficulty for polarization SAR to eliminate false targets in the range-Doppler domain,thereby achieving the objective of deception jamming.Furthermore,the alternating transmissions of multiple single-polarization jammers can generate intermittent sampling jamming in the azimuth direction,increasing the complexity of false target generation for deception jamming.As this method does not require changes to the emission structure of existing single-polarization jammers in practical applications,it offers convenience for interfering with polarization SAR.Moreover,the method employs template-modulation jamming for both suppression and dece

关 键 词：极化合成孔径雷达 多干扰机协同 单极化 模板调制干扰 

分 类 号：TN95[电子电信—信号与信息处理]