一种快速且稳健的极化干涉SAR植被高度反演方法  

A Fast and Robust Vegetation Height Inversion Method for Polarimetric SAR Interferometry

作　　者：韩迪[1] 张晓玲[1] 

机构地区：[1]电子科技大学电子工程学院,成都610054

出　　处：《信号处理》2009年第10期1649-1653,共5页Journal of Signal Processing

摘　　要：三阶段法是一种稳健性较好的极化干涉SAR植被高度反演方法,反演精度比较高。但是三阶段法本身运算量大,且初值选取容易引起病态解。本文将DEM差分算法和相干幅度法相融合,提出一种快速且稳健的植被高度反演方法。该方法在保证比较高的植被高度估计精度的同时,对消光系数或植被垂直结构的变化具有稳健性,而且大大减少了反演算法的运算量。最后用L波段极化干涉SAR仿真数据验证了该方法的有效性。The Three-Stage method is a robust vegetation height inversion mehod for Polarimetric SAR Interferometry, the accuracy of it is high. But the calculation of the three-stage method is complex and the results depend on the choose of initial value. The paper proposes a fast and robust vegetation height inversion mehod based on fusion of DEM differencing algorithm and the coherence amplitude method, this method not only keeps the accuracy of vegetation height estimation high, but also it is robust to variations in extinction or vertical structure, and it reduces the calculation of the algorithm greatly. Finally, the L band simulated Polarimetric SAR Interferometry data are used to validate the proposed method .

关 键 词：极化干涉SAR 植被散射模型 DEM差分法 相干系数幅度法 

分 类 号：TN95[电子电信—信号与信息处理]