双基地斜视SAR距离徙动成像算法  

Range Migration Algorithm in Bistatic SAR

作　　者：武俊杰[1] 熊金涛[1] 黄钰林[1] 杨建宇[1] 

机构地区：[1]电子科技大学电子工程学院,成都610054

出　　处：《电子科技大学学报》2007年第S2期1106-1109,共4页Journal of University of Electronic Science and Technology of China

摘　　要：基于等效斜视距离模型,分析了双基地平移不变斜视合成孔径雷达(SAR)的信号模型,导出了二维时域和二维频城(波数域)的点目标响应。在此基础上,借鉴单基地距离徙动算法的推导方法,提出了适合该几何结构的双基地SAR距离徙动成像算法,给出了算法实现的解析模型,并详细分析了其中的Stolt映射等关键技术。该算法对于大斜视情况下的双基地SAR成像具有一定的优势,仿真结果证明了该算法对双基地大斜视进行聚焦的有效性。In this paper,the imaging model for the bistatic translational invariant Squint Synthetic Aperture Radar(SAR)is deduced.A derivation of the point target responses both in two-dimensional frequency (wavenumber)and time domains is presented.Using these results,the Range Migration Algorithm(RMA),which could solve the large squint angle in monostatic SAR,is transplanted to the bistatic case.The analytical steps of the algorithm are given.Especially,the key operation of Stolt mapping is interpreted.The numerical simulation results show that the algorithm is effective for high squint in bistatic SAR.

关 键 词：双基地SAR 距离徙动算法 Stolt映射 平移不变斜视结构 

分 类 号：TN957.52[电子电信—信号与信息处理]