对配准误差稳健的多基线相位展开方法  

A Robust Phase Unwrapping Method to Coregistration Error for Multibaseline InSAR Systems

作　　者：李海[1] 廖桂生[1] 

机构地区：[1]西安电子科技大学雷达信号处理重点实验室,陕西西安710071

出　　处：《电子学报》2008年第9期1670-1675,共6页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60736009)

摘　　要：提出了一种对配准误差稳健的多基线相位展开方法.该方法首先根据配准误差的方向来确定最优联合观测矢量,进而确定存在配准误差时的真实导向矢量,并且用此导向矢量进行波束形成来进行相位展开,能够同时完成图像配准、干涉相位噪声滤波和相位展开,因此可以在SAR图像配准精度很差(可以允许达到一个分辨单元)的条件下得到稳健的相位展开性能,仿真结果证明了此方法的有效性.We propose a robust phase unwrapping method to coregistration error for multibaseline InSAR systems. In the method, the optimal joint data vector is determined by the direction of the coregistration, the true steering vector with large coregistrafion error is computed according to the data vector, and then the beamforming technique with the steering vector is used to un- wrapping the InSAR interferometric phase. The method can carry out image coregistrafion, interferometric phase noise filtering and phase unwrapping simultaneously. Computer simulation results show that the method can provide acctu-ate estimate of the absolutely interferometfic phase even when the coregistration error reaches one pixel.

关 键 词：干涉合成孔径雷达 配准误差 多基线 相位展开 最优联合观测矢量 真实导向矢量 

分 类 号：TN957[电子电信—信号与信息处理]