前视双基地SAR CS成像算法  

CS Algorithm for Forward-Looking Bistatic SAR

作　　者：蔡复青[1] 何友[1] 林雪原[1] 宋杰[1] 

机构地区：[1]海军航空工程学院信息融合研究所,烟台市二马路188号264001

出　　处：《武汉大学学报（信息科学版）》2010年第11期1300-1304,共5页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(60672140和60672139)

摘　　要：提出了前视双基地SAR CS成像方法。首先研究了前视双基地SAR的成像机理,并建立了信号模型;然后通过时域线性距离徙动补偿将前视双基地SAR进行单站固定等效,并分析了回波信号等效后的方位空变性特点;在此基础上,确定了前视双基地SAR CS成像算法的相位匹配函数;最后通过算法仿真验证了算法的正确性。The chirp scaling（CS） algorithm for forward-looking bistatic synthetic aperture radar is proposed.Firstly,the imaging theory of forward-looking Bi-SAR is studied and its signal model is either constructed.Then the forward-looking Bi-SAR is degraded into the fixed receiver Bi-SAR by time domain linear range migration compensation,and the azimuth Doppler modulation rate change of the degenerated signals are analyzed;Based on these,the Bi-SAR chirp scaling algorithm is brought forward with the new match functions.Finally,the computer simulation verifies the validity of this approach.

关 键 词：双基地SAR 前视双基地SAR CS算法 

分 类 号：P237.3[天文地球—摄影测量与遥感] P236[天文地球—测绘科学与技术]