机载大斜视SAR的快速简易成像方法  

A simplified fast processing method for high squint airborne SAR

作　　者：黄源宝[1] 李真芳[1] 保铮[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2004年第4期543-546,共4页Journal of Xidian University

基　　金："十五"预研项目和微波成像重点实验室基金资助(51442010301DZ01)

摘　　要：大斜视角下SAR信号特点表现为大的距离走动和小的距离弯曲,这使得采用时域距离走动校正和二维可分离成像方法成为可能.但方位场景较大时要考虑聚焦深度的限制,须采用复杂的算法.提出一种将成像和校正几何形变相结合的分段处理方法,段与段之间可以完全衔接,实现快速连续实时成像.仿真试验和实测数据成像均证明快速简易方法是可行的.The high squint SAR signal characterizes a large range walk and a small range curvature, which enables us to compress it in range and azimuth separately. But in case of the large azimuth scene size, complex algorithms must be employed to cope with the constraint of focus depth. In this paper we present a simplified fast sub-aperture method which incorporates reshaping in imaging and is able to group sub-images seamlessly. Finally simulation results and real data image are given to verify our method.

关 键 词：大斜视SAR成像 快速简易方法 横向聚焦深度 

分 类 号：TN958[电子电信—信号与信息处理]