星载寄生式SAR系统频率同步分析  

Analysis of Frequency Synchronization Error in Spaceborne Parasitic SAR System

作　　者：张永胜[1] 梁甸农[1] 董臻[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2006年第2期85-87,110,共4页Journal of National University of Defense Technology

基　　金：国家部委基金资助项目(41307020203)

摘　　要：针对星载寄生式SAR系统对地观测应用背景,详细分析了频率同步误差对双站SAR成像的影响,以法国提出的“干涉车轮”构形为例,对同步误差进行了仿真。提出了一种新的频率同步方法,该方法通过接收主星的直达波信号并进行相关处理,从而得到频率同步误差。计算机仿真结果表明该同步方法的准确性和有效性。Based on the spacebome parasitic SAR earth observation application, the author aimed to analyse the influence of the frequency synchronization error to the bistatic SAR imaging. The ＂interferometric cartwheel＂ configuration was employed as an example, to make computer simulation of the synchronization error. Therefore, a novel frequency synchronization method was presented, This method acquires the frequency synchronization error by the correlation processing to the ＂direct signal＂ which leaked from the SAR antenna side lobe. The simulation results indicate dais new synchronization method is accurate and effective.

关 键 词：星载SAR 寄生式SAR 双基地 频率同步 

分 类 号：TN958[电子电信—信号与信息处理]