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基于误差曲线拟合的SAR-GMTI通道均衡方法

发表时间:2012-11-30  浏览量:1072  下载量:492
全部作者: 陈士超,李健,邢孟道,保铮
作者单位: 西安电子科技大学雷达信号处理国家重点实验室
摘 要: 针对SAR-GMTI实测数据处理过程中通道间特性不一致所导致的杂波相消不干净,继而使得后续的动目标检测和定位产生虚警的问题,提出一种简单有效的在多普勒域进行幅相误差曲线拟合校正实现通道均衡的方法,提高通道间信号的相关性。算法中对不同通道回波数据的幅度和相位分别进行误差曲线拟合以消除通道间特性不一致的影响,在大幅减少计算量的前提下,很好地消除了系统误差对杂波相消过程的影响,实现了动目标的正确检测和定位。实测数据验证了所提方法的有效性。
关 键 词: 信号与信息处理;通道均衡;曲线拟合;动目标检测
Title: An approach based on curve fitting for channel equalization in SAR-GMTI
Author: CHEN Shichao, LI Jian, XING Mengdao, BAO Zheng
Organization: National Key Laboratory of Radar Signal Processing, Xidian University
Abstract: This paper fouces on the problem of the uncleanness of clutter suppression caused by the differences among different channels of SAR-GMTI, and the fake error of detection and orientation of the moving targets, subsequently. A simple but effective approach using curve fitting in the Doppler domain is proposed to describe the error among different channels. The influence introduced in from the system is greatly eliminated by the proposed method, and the coherent coefficients between channels are improved dramaticlly. Accurate processing is achieved for the detection and orientation of the moving target, due to the cleanness implementation of clutter suppression with calibration channels. The effectiveness of the proposed method is demonstrated with real data.
Key words: signal and information processing; channel equalization; curve fitting; moving target detection
发表期数: 2012年11月第22期
引用格式: 陈士超,李健,邢孟道,等. 基于误差曲线拟合的SAR-GMTI通道均衡方法[J]. 中国科技论文在线精品论文,2012,5(22):2189-2194.
 
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