基于精确距离模型的改进R-D算法  

Modified Range-Doppler algorithm using the exact range model

作　　者：吴照宪[1] 韩松[1] 

机构地区：[1]中国科学院电子学研究所,北京100080

出　　处：《测绘科学》2008年第5期46-48,共3页Science of Surveying and Mapping

摘　　要：本文利用合成孔径雷达(SAR)最为精确的标准斜视距离模型,推导出了一种适合斜视SAR精确成像的改进距离-多普勒(R-D)算法。文章进一步分析了SAR的四种距离模型,将已有的三种R-D算法以及本文提出的改进R-D算法和四种距离模型之间建立了一一映射,指出了四种R-D算法之间的本质区别。最后对四种R-D算法进行了仿真,结果表明本文给出的改进R-D算法最能够适应斜视情况下的精确成像。In this paper a modified Range - Doppler algorithm in squint mode SAR is presented using the most exact range model. Four range models are given. Three R - D algorithms already existed and the one presented in this paper are mapped one - to - one with the four models. Differences of four R - D algorithms are pointed out. The simulation of four R - D algorithms demonstrates that the modified algorithm meets the requirements most exactly in squint mode imaging.

关 键 词：合成孔径雷达 距离模型 距离-多普勒算法 二次距离压缩 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]