弹载大斜视SAR分块处理成像算法  

An Imaging Algorithm for High Squint Missile-borne SAR Based on Block Processing

作　　者：王佳 杨垒 龚明 

机构地区：[1]上海无线电设备研究所,上海200090 [2]上海市航空航天器电磁环境效应重点实验室,上海200438

出　　处：《制导与引信》2013年第3期32-36,51,共6页Guidance & Fuze

摘　　要：针对弹载SAR大斜视工作模式,分析了回波信号中距离徙动及相位近似误差对成像的影响。针对距离走动校正引起的聚焦深度限制以及为了提高运动补偿的精度,提出了一种在回波数据的方位和距离进行分块处理的改进RD算法。计算机仿真和实测数据处理验证了所提算法的有效性。For the high squint mode of missile-borne SAR, analyzes the impact of range celt migration and phase error on imaging. In order to overcome the constraint of the focus depth caused by range walk correction, and improve the accuracy of motion error compensa- tion, an improved RD algorithm based on block processing in azimuth and range cell is pro- posed. The validity of the proposed method is demonstrated with computer simulation and real data collected by an experimental airborne system.

关 键 词：弹载雷达 合成孔径雷达 分块处理 

分 类 号：TN958[电子电信—信号与信息处理]