基于DPCA技术的星载SAR/GMTI处理方法  

An Algorithm of Spaceborne SAR/GMTI Based on DPCA

作　　者：孙娜[1] 周荫清[1] 李景文[1] 

机构地区：[1]北京航空航天大学电子信息工程学院

出　　处：《电子与信息学报》2005年第10期1564-1568,共5页Journal of Electronics & Information Technology

基　　金："十五"计划预研(41321040201)资助课题

摘　　要：星载合成孔径雷达的轨道运动以及地球自转、地球曲率等因素使星载SAR/GMTI处理方法与机载不同。该文首先分析了星载SAR三孔径天线信号特性,然后给出并详细分析了基于偏置相位巾心天线(DPCA)的机载SAR/GMTI处理方法。在此基础上,给出了一种基于DPCA技术的星载SAR动目标检测、测速及目标定位的实现方法。最后,星载SAR/GMTI计算机仿真结果验证了该方法的有效性。Such factors as complicated spaceborne SAR orbital motion, earth rotation, earth surface curvature etc. make the realization of spaceborne SAR/GMTI different from airborne SAR/GMTI. In this paper, the property of three-antenna spaceborne SAR is analyzed firstly, and then the method of airborne SAR/GMTI processing is given and analyzed. On the basis of airborne SAR/GMTI, an algorithm of spaceborne SAR moving target detection, radial velocity estimation and relocation based on DPCA technique is presented. Finally, spaceborne SAR/GMTI computer simulation results validate its effectiveness.

关 键 词：星载合成孔径雷达 GMTI 杂波抑制 偏置相位中心天线 

分 类 号：TN957.5[电子电信—信号与信息处理]