机载聚束式SAR的实时成像算法  

The real-time imaging algorithm of airborne spotlight mode synthetic aperture radar

作　　者：井丽红 焦淑红[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《应用科技》2011年第9期23-27,共5页Applied Science and Technology

基　　金：973国家安全重大基础研究基金资助项目(61393010101-1);中央高校基本科研业务专项基金资助项目(HEUCFZ1013)

摘　　要：聚束式SAR适用于小场景成像,目前聚束式SAR的成像算法有很多,基于实际系统中实时性的要求,可采用S-RD算法来完成对目标的成像.由于成像区域较小,距离徙动的影响较小,成像算法可分维处理.在距离维,采用去斜技术对回波进行处理,实现脉冲压缩;在方位维,用方位向匹配函数实现方位向聚焦,最后计算该算法的运算量.试验结果表明:该算法步骤简单,运算量小,可被应用于实际系统中完成对目标的实时成像.The article discussed the imaging algorithms of spotlight mode synthetic aperture radar （SAR） for small scenes. At present there were many imaging algorithms for spotlight mode SAR. Based on the actual real-time requirement of system, S-RD algorithm was used to accomplish the goal of imaging. Due to the small imaging area, the algorithm was divided into two dimensions. In distance dimension, the anti-tilting technology was adopted to deal with echo, and then realize pulse compression; In the azimuth dimension, matching function was used to realize focus of azimuth. Finally the amount of computation was calculated. The experimental results show that the proposed approach is simple with small amount of computation, it can be applied to real-time imaging of target in practice.

关 键 词：聚束式SAR 实时成像 S-RD算法 去斜技术 

分 类 号：TN958[电子电信—信号与信息处理]