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
出处
《现代雷达》
CSCD
北大核心
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
作者简介
通信作者：张双喜 Email：shuangxizhang1984@163．com 张双喜 男，1984年生，博士生。研究方向为SAR的运动补偿和SAR抗干扰。
孙光才 男，1984年生，博士生。研究方向为高分辨SAR成像算法、动目标检测成像。
刘艳阳 男，1987年生，博士生。研究方向为InSAR及多通道SAR成像算法。
