分支阻断干涉SAR相位展开算法的解析与实现  

Analysis and Implementation of Branch Cut Phase Unwrapping Algorithm for Interferometric SAR

作　　者：李笑郁[1] 毛士艺[1] 

机构地区：[1]北京航空航天大学电子工程系203教研室,北京100083

出　　处：《电子学报》2001年第z1期1790-1793,共4页Acta Electronica Sinica

基　　金：国家自然科学基金重点项目 (No .69831 0 4 0 )

摘　　要：本文以干涉SAR相位展开的残差理论为基础对经典的相位展开算法分支阻断算法进行了详细深入的理论分析和解析 .对长期以来由于原始文献的简节或由对残差现象的不充分理解而造成的对Goldstein的分支阻断算法的错误理解和结论进行了说明和纠正 .进而 ,引入了统一接地处理与最近邻偶极子对残差预处理步骤 ,大幅度降低了分支的长度及展开相位解平面中的不连续区域的个数 .最后讨论了分支阻断算法的性能和特点 ,及其在分离残差方面的普遍意义 .实际XBased on the residue theorem of Interferometric SAR,in depth analysis and detailed description of Branch Cut algorithm,one of the most popular InSAR phase unwrapping approaches,has been given in this paper.Many wrong implementations and premature conclusions about Branch Cut method caused by the over brief description of Goldstein′s original algorithm and not enough understanding of the residue phenomenon have been clarified and rectified totally.Besides,grounding process and dipole remover pre processor are introduced in Goldstein′s Branch Cut algorithm to get tremendously length reduced branch cuts and more continuous unwrapped phase surface.Finally,the performance and character of Branch Cut method are discussed and branch cut is stated as an essential factor for all the phase unwrapping approaches,either existed or under developed,for its nature of isolating the residue effect.X SAR data based experimental results are presented as the proof of the paper.

关 键 词：干涉合成孔径雷达 相位展开 分支阻断法 残差 

分 类 号：TN957.52[电子电信—信号与信息处理]