%0 Journal Article
%T Analysis of the Doppler Effect in FMCW-SAR and Its Influence on the Image of the System<br>多普勒效应对FMCW-SAR系统成像性能的影响分析
%A Zhang Da-wei
%A Wei Fang
%A Wang Yan-fei
%A <br>张大炜
%A 魏芳
%A 王岩飞
%J 电子与信息学报
%D 2008
%I 
%X Sawtooth signals are transmitted and received continuously in FMCW-SAR, which makes the character of the echo of FMCW-SAR is different from pulsed SAR. Combined with the imaging principle of FMCW-SAR, the influence of Doppler effect on FMCW-SAR imaging system is analyzed in this paper. It is pointed out that second coupling of range and azimuth signals may be caused by Doppler effect and defocusing of the image may be caused by it. An approach to compensate for the Doppler effect in the azimuth Doppler domain is presented and the flow chart of the RD algorithm for the FMCW-SAR imaging system is given out. Experimental results show that the Doppler effect and second coupling of the range and azimuth signals may be compensated by the approach presented in this paper and better images could be formed.
%K Pulsed SAR
%K FMCW-SAR
%K Doppler effect<br>脉冲SAR
%K FMCW-SAR
%K 多普勒效应
%K 多普勒效应
%K 成像系统
%K 成像性能
%K 影响分析
%K System
%K Image
%K Influence
%K the
%K Doppler
%K Effect
%K 成像质量
%K 结果
%K 验证
%K 算法仿真
%K 流程
%K 方法
%K 补偿
%K 误差
%K 回波信号
%K 回波特性
%K 聚焦
%K 图像
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=0BF59CA9670F18E7CEB1925FE197DB87&yid=67289AFF6305E306&vid=340AC2BF8E7AB4FD&iid=38B194292C032A66&sid=8966A0F1B07BE5EE&eid=8DBE05486163BAB2&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=8