多基线InSAR仿真干涉图相位解缠技术研究  

Research on the Technology of Phase Unwrapping of Simulated Multi-baseline InSAR Interferograms

作　　者：唐洪城 TANG Hong-cheng(College of surveying and Geo-informatics,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学测绘与地理信息学院

出　　处：《科技视界》2019年第32期7-8,共2页Science & Technology Vision

摘　　要：多基线干涉SAR技术结合了长短基线的优点,从而可获得较高的高程测量精度。本文基于多基线最大似然估计法(MLE)对仿真干涉图进行相位解缠,并在此基础上加入低分辨率DEM作为先验信息,降低噪声的影响。实验表明:MLE方法能大致反演出地形相对趋势,但易受到噪声影响;而基于低分辨率DEM的最大后验估计相位解缠算法能够很好地降低噪声影响,从而获得较高精度的DEM。Multi-baseline interferometric SAR technology combines the advantages of long and short baselines to obtain higher elevation measurement accuracy. In this paper, the phase unwrapping of the simulation interferogram is carried out based on the multi-baseline maximum likelihood estimation( MLE) method, and low-resolution DEM is added as prior information to reduce the impact of noise. The experiment shows that MLE method can roughly reverse the relative trend of the terrain, but it is easy to be affected by noise. However, the maximum posteriori estimation phase unwrapping algorithm based on low-resolution DEM can effectively reduce the noise effect, so as to obtain a DEM with relatively high accuracy.

关 键 词：多基线INSAR 数字高程模型 最大似然估计 最大后验估计 

分 类 号：TN957.52[电子电信—信号与信息处理]