一种新的SAR面目标回波模拟快速算法  

A new facet object echo simulation fast algorithm for SAR

作　　者：陈超[1] 戎建刚[1] 

机构地区：[1]中国航天科工集团公司8511研究所,江苏南京210007

出　　处：《航天电子对抗》2008年第5期26-28,54,共4页Aerospace Electronic Warfare

摘　　要：回波信号模拟是合成孔径雷达模拟技术的基础。与实际挂飞试验相比,模拟技术具有灵活性高、成本低等优点。传统的SAR回波信号模拟方法因为运算量大而很难实施。分析了SAR回波信号距离延迟和多普勒相位的特点,得出了相同方位向目标回波数据间的近似关系,提出一种基于点目标回波数据矩阵的回波模拟新方法。该方法采用移位叠加,避免了大量重复的计算。Echo signal simulation is the foundation of SAR simulation technology. Compared to flight experimentation, simulation technology has the merits of low cost and high agility. The computation load of tradi tional method is too heavy to carry out. The characteristics of distance delay and the doppler phase of SAR echo signal are analyzed,and the relation between echo data of objects in the same direction is discovered. A new echo signal simulation method based on echo data matrix of point object is put forward. Due to adopting shifting and adding,the new method avoids a mass of redundant computation.

关 键 词：合成孔径雷达 面目标 回波信号模拟 

分 类 号：TN955[电子电信—信号与信息处理]