高波段SAR与UWB SAR运动补偿效果分析  

The Analysis of Motion Compensation between high-band SAR and UWB SAR

作　　者：常文革[1] 李建阳[1] 李悦丽[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,长沙410073

出　　处：《信号处理》2009年第1期99-103,共5页Journal of Signal Processing

基　　金：2005航天支撑技术基金资助

摘　　要：对于相同的分辨力要求,高波段SAR合成孔径较短,因此运动补偿处理相对较为容易,而超宽带(UWB) SAR,却需要较长的合成孔径,运动补偿处理难度较大。本文分析了高波段SAR和UWB SAR的特点,采用同一次飞行试验中高波段SAR和UWB SAR实测数据,提取出基于多普勒调频率的运动补偿前后高波段SAR和UWB SAR图像中点目标的相位误差及其频谱,分析了运动补偿的效果,得出了基于多普勒调频率的运动补偿对高波段SAR和UWB SAR聚焦性能的改善程度。The imaging and motion compensation of high-band SAR is comparatively easy, because of its short aperture length. While the imaging and motion compensation of UWB SAR is very difficult owing to its very long aperture length. This paper analyzes the proprieties of high-band SAR and UWB SAR. The phase errors and spectrum are exacted from the both real SAR images before and after motion compensation. Based on the analysis of phase errors, we can get the focusing performance of SAR images after motion compensation using Doppler rate estimation.

关 键 词：高波段SAR UWB SAR 运动补偿 多普勒调频率 相位梯度 

分 类 号：TN957[电子电信—信号与信息处理]