SAR成像中加权处理的改进研究  

A Refined Weighting Algorithm for SAR Imaging

作　　者：邵智超[1] 吴彦鸿[2] 贾鑫[2] 

机构地区：[1]装备指挥技术学院,研究生部,北京,101416 [2]装备指挥技术学院,测量控制系,北京,101416

出　　处：《装备指挥技术学院学报》2003年第2期61-65,共5页Journal of the Academy of Equipment Command & Technology

基　　金：国家高技术发展人才资助项目

摘　　要：点目标回波信号经过匹配滤波后,输出压缩脉冲包络近似为辛格函数的形状,在主瓣两侧存在逐渐递减的旁瓣,抑制旁瓣是合成孔径雷达成像研究的重要内容,而加权技术是实现抑制旁瓣的重要途径.在分析传统加权技术的基础上,对其进行了改进,并用改进的加权方法对点目标回波信号及成像过程进行了计算机仿真;结果表明,该方法与传统加权技术相比,没有展宽主瓣宽度,且具有较好的旁瓣抑制能力.After point target echo is matched filtering, the outline of output compression pulse is similar to function sinc, which exists gradually decreasing sidelobe beyond mainlobe. And sidelobe control is important to SAR imaging. We can realize sidelobe control by means of weighting. In this paper, traditional weighting algorithm is analyzed and refined. Finally, this refined algorithm is tested by computer simulation. Results indicate that refined weighting algorithm has better ability of sidelobe control and width of mainlobe is not widened by contrast with the traditional.

关 键 词：合成孔径雷达 SAR 成像 加权处理 旁瓣抑制 脉冲压缩 

分 类 号：TN958[电子电信—信号与信息处理] TN957.51[电子电信—信息与通信工程]