稳健的多通道SAR/GMTI通道盲均衡算法  

Robust Channel Blind Equalization Algorithm for Multi-Channel SAR/GMTI System

作　　者：田斌[1] 朱岱寅[2] 吴迪[2] 淘满意 朱兆达[2] 

机构地区：[1]西安电子工程研究所,陕西西安710100 [2]南京航空航天大学电子信息工程学院,江苏南京210016 [3]上海卫星工程研究所,上海200240

出　　处：《电子学报》2014年第3期424-431,共8页Acta Electronica Sinica

基　　金：国家自然科学基金(No.61071165);教育部新世纪优秀人才支持计划(No.NCET-09-0069)资助课题;中央高校基本科研业务费专项基金(No.NS2012097);教育部博士点基金(No.20123218120021)

摘　　要：对于实际的多通道合成孔径雷达(Synthetic Aperture Radar,SAR)系统,各接收通道响应之间不可避免地存在着一定程度的幅度和相位误差,为了得到较为满意的地面动目标显示(Ground Moving Target Indication,GMTI)性能,通常都会在杂波抑制之前对通道间的幅度相位误差进行有效地校正.本文在基于回波数据相关矩阵特征分解的通道盲均衡算法基础上,结合降维处理技术及中值估计方法,提出一种稳健的多通道SAR/GMTI通道盲均衡算法.实测数据实验结果表明:与原通道盲均衡算法相比,本文所提算法不但收敛速度快,而且算法的有效性不受样本集中目标信号的影响.The channel mismatch is often inevitable for the actual multi-channel synthetic aperture radar/ground moving tar- get indication （SAR/GMTI） system. Consequently, to enhance GMTI performance, the channel mismatch must be effectively cali- brated. A robust channel blind equalization algorithm is investigated. This proposed algorithm is on the basis of the classical channel blind equalization algorithm with eigen-decomposition of data covariance matrix, and combines reduced-dimension processing and median estimate. Experimental results on measured SAR data demonstrate that compared with the conventional algorithm, this proposed algorithm not only shows a faster convergence rate but also exhibits convergence-robustness to targets in the training sample data.

关 键 词：地面动目标检测 通道盲均衡 降维处理 中值估计 

分 类 号：TN95[电子电信—信号与信息处理]