高分辨率星载聚束式SAR成像处理实现方法  

The Realizotion of Image Formation Algorithm for High Resolution Spaceborne Spotlight SAR

作　　者：顾毅[1] 李春升[1] 陈杰[1] 周荫清[1] 

机构地区：[1]北京航空航天大学201教研室,北京100083

出　　处：《宇航学报》2005年第B10期87-92,共6页Journal of Astronautics

摘　　要：高分辨率星载聚束式SAR的信号带宽与多普勒带宽很大,为了保证系统的覆盖特性和成像处理精度,常规的成像处理方法已不能适用。为此针对高分辨率(0.3米)星载聚束式SAR,给出一种高精度成像处理实现方法。该方法对Deramp Chirp Scaling算法中的相位误差进行考察,给出了基于三次相位误差校正的星载聚束式DerampChirp Scaling成像算法。计算机仿真结果验证了该方法的有效性。Signal band and Doppler band are very large in order to realize precise imaging of high-resolution spaceborne spotlight SAR. At the same time normal imaging methods can not satisfy the radar system coverage performance and the precision of imaging. This paper offers a kind of high precision imaging method for high-resolution （0.3m） space borne spotlight SAR. This method utilizes Deramp Chirp Sealing and the cubic correction method, and offers a Deramp Chirp Sealing algorithm with cubic correction for space borne spotlight SAR. The method proved effective by the simulation.

关 键 词：合成孔径雷达 雷达成像 Deramp CHIRP SCALING算法 

分 类 号：TN957[电子电信—信号与信息处理]