SAR穿墙成像中墙体影响图像域补偿方法  

A Method to Compensate Wall Effects in the Image Domain for SAR Through-theWall Imaging

作　　者：金添[1] 孙鑫[1] 李欣[1] 陆必应[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》2012年第7期1423-1428,共6页Acta Electronica Sinica

基　　金：全国优秀博士学位论文作者专项资金(No.201046);新世纪优秀人才支持计划(No.NCET-10-0895)

摘　　要：合成孔径雷达(SAR)穿墙成像中的关键问题是对墙体影响的补偿.而墙体参数通常为未知量,获得其值后才能进行补偿.本文在定量分析了墙体对墙后目标聚焦和定位影响的基础上,提出了一种图像域墙体影响补偿方法.该方法基于传统成像算法获得的图像及其滤波结果进行墙体参数估计,具有估计精度高和计算量小的优点.仿真结果验证了本文提出的方法能够实现墙后目标的精确聚焦和定位.Compensation of wall effects is the key problem of Synthetic Apertttre Radar （SAR） in through-the-wall imaging. Wall parameters are usually unknown, which are essential for wall effects compensation. In this paper, an approach to compensate wall effects in the image domain is proposed on the quantitative analysis of the wall effects on focusing and locating of behind-the- wall targets. The proposed method estimates the wall parameters from the image formed by traditional image formations and its ill- tered results, which has the advantages of high precision and low computational burden. It is validated that the proposed method can precisely focus and locate behind-the-waU targets using simulated data.

关 键 词：穿墙成像 合成孔径雷达 电磁波折射 参数估计 图像滤波 

分 类 号：TN957[电子电信—信号与信息处理]