一种宽波束机载SAR运动误差补偿算法  

A Kind of Motion Compensation Algorithm for Wide-beam Airborne SAR Motion Error

作　　者：谭鸽伟[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建厦门361021

出　　处：《现代雷达》2010年第9期51-54,共4页Modern Radar

摘　　要：精确的运动补偿是高分辨率机载合成孔径雷达(SAR)成像的关键。运动补偿就是对原始数据进行相位校正和斜距位置校正,使雷达回波数据如同是载机在匀速直线运动状态下获得的,这是各种成像算法的基础。随着宽波束机载SAR应用的发展,运动误差在方位向的空变性对SAR成像的影响日趋显著。文中讨论了运动误差方位向的空变性及频率特性,提出了一种宽波束机载SAR运动误差补偿算法,并给出了仿真结果和真实SAR数据处理结果。Precise motion compensation is the key to high-resolution airborne SAR imaging.The phase and range position correc-tions to the raw data is performed by motion compensation which makes the radar echo as if it were acquired on straight rectilinear tracks,which is the basis of all kinds of imaging algorithm.With the development of azimuth wide-beam applications,the influ-ence of spatial-variant properties of motion error to SAR image is becoming severe,so the azimuth spatial-variant properties of mo-tion error and its frequency properties are discussed in the paper and a kind of compensation method for wide-beam airborne SAR motion error is put forward,simulation and real SAR data processing results are given.

关 键 词：机载合成孔径雷达 宽波束 运动误差 运动补偿 

分 类 号：TN958[电子电信—信号与信息处理]