星载SAR的GMTI技术  

The GMTI Technology of Spaceborn SAR

作　　者：姜岩[1] 陈筠力[1] 王贇 王文峰[2] 

机构地区：[1]上海卫星工程研究所,上海200240 [2]上海航天技术研究院,上海201109

出　　处：《上海航天》2009年第6期60-64,共5页Aerospace Shanghai

摘　　要：根据地面动目标回波信号特性,研究了用于星载合成孔径雷达(SAR)的相位中心偏置天线(DPCA)、沿航迹干涉(ATI)、DPCA-Radon和DPCA-Frft-ATI等地面动目标检测(GMTI)算法。讨论了以实现GMTI为任务的分布SAR小卫星的构型和工作模式,分析了GMTI的最大可检测速度、最小可检测速度和盲速等系统指标,以及分布式SAR系统实现GMTI的难点。The algorithms of displaced phase center antenna（DPCA）,along-track interferometry（ATI）,DPCA-Radon and DPCA-Frft-ATI that would be used for the ground motion target inspection（GMTI） were analyzed according to the echo characteristics of the ground motion target in this paper.The scheme and operation modes of distributed synthetic aperture radar（SAR） micro-satellite whose mission was GMTI were discussed.The system features of maximum detectable velocity,minimum detectable velocity and bland velocity for GMTI were analyzed,and so were the difficulties of GMTI realization for distributed SAR system.

关 键 词：地面动目标检测 相位中心偏置天线 沿航迹干涉 分数阶傅里叶变换 最小可检测速度 

分 类 号：TN958[电子电信—信号与信息处理]