多通道SAR频率多普勒域宽带长CPI STAP方法  

Frequency-Doppler Domain Wideband Long CPI STAP Method for Multichannel SAR System

作　　者：常玉林[1] 周红[1] 黄晓涛[1] 周智敏[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,湖南长沙410073

出　　处：《电子学报》2011年第6期1245-1252,共8页Acta Electronica Sinica

基　　金：教育部新世纪优秀人才支持计划(No.NCET-07-0223)

摘　　要：在频率-多普勒域,提出了一种适合多通道SAR系统的宽带长CPI(Coherent Processing Intervals)STAP(Space Time Adaptive Processing)方法.该方法突破了传统STAP方法"距离走动不能超过一个距离分辨单元"的限制,能够适应运动目标沿时间维/空间维的跨距离单元走动,从而能够利用长的相干积累时间和长基线,其运动目标检测和速度估计性能远远优于传统的GMTI(Ground Moving Target Indication)方法.A new STAP method is proposed suitable for multi-channel SAR system：the frequency-Doppler domain wideband long CPI STAP method.The introduced method can adapt to the range walk along slow time and space dimension,so it can make use of both long CPI and long baseline.By utilizing the large bandwidth of the SAR system,the proposed method can eliminate the blind speed introduced by long sparse baseline.The introduced method can detect moving targets even with small non-zero range velocities or non-zero azimuth velocities,and can estimate their range and azimuth velocities.

关 键 词：地面运动目标指示 多通道SARSTAP 宽带长相干积累时间 频率多普勒域 

分 类 号：TN959.73[电子电信—信号与信息处理] TN959.1[电子电信—信息与通信工程]