基于四通道SAR欺骗式干扰抑制算法  

Deception Interference Supression Algorithm Based on Four-channel for SAR

作　　者：张双喜[1] 孙光才[1] 刘艳阳[1] 周峰[1] 邢孟道[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,西安710071

出　　处：《现代雷达》2011年第2期22-26,30,共6页Modern Radar

基　　金：武器装备预研基金项目

摘　　要：研究了SAR干扰抑制算法特别是基于多通道干扰抑制算法,提出了一种基于四通道欺骗式干扰抑制算法。首先对欺骗式干扰信号模型及其产生机理进行介绍,并对其信号形式进行分析,接着从四通道信号处理角度出发对欺骗式干扰信号的形式和场景回波信号进行分析并比较其异同点。对于场景回波信号而言,各个通道的方位多普勒谱仅有固定相位差,而对于欺骗式干扰各个通道方位多普勒谱是随欺骗场景发生变化。基于上述差异,文中提出利用场景回波的多普勒谱具有固定相位差来构造通道的导向矢量,进而达到对欺骗式干扰进行抑制。最后通过仿真实验证实文中方法的有效性和可行性。In this paper, the existing interference suppression algorithm for SAR especially multi-channel interference suppression algorithm is studied, and then a new deception interference suppression algorithm based on four-channel is proposed. At the first, the signal model and the mechanism of deception interference is introduced, after that an analysis of it is made. Then the similarities and differences between deception interference and echo signals from scene are compared from the perspective of four-channel signal processing. For the scene echo, the azimuth Doppler spectrum of each channel is only a fixed phase difference, but for deception interference the azimuth Doppler spectrum of each channel is varying with the deceived scene. Based on these differences, a steering vector for the channels can be constructed to make an interference suppression for deception interference. Finally, simulation experiments confirm the effectiveness and feasibility of the proposed algorithm

关 键 词：合成孔径雷达 欺骗式干扰 四通道处理 干扰抑制 

分 类 号：TN974[电子电信—信号与信息处理]