基于酉ESPRIT算法的极化干涉相位估计Unitary ESPRIT-based phase estimation for polarimetric SAR interferometry
杨磊,赵拥军,王志刚
摘要(Abstract)：
目前SAR极化干涉测量地形参数已经成为一种新兴的前沿技术。在现有提取极化干涉相位的技术中,由空间谱估计理论发展而来的,利用MUSIC、TLS-ESPRIT算法获取干涉相位信息的方法正逐步完善起来。但由于SAR信号存在散射点的观测数据少的问题,利用上述方法往往不能得到更高精度的干涉相位。作者提出的基于酉ESPRIT算法估算干涉相位的方法,充分利用了复观测数据以及共轭数据中的信息,使得观测数据等效增加了一倍,从而提高了植被高度参数的估计精度。本文详细阐述了该方法的原理和实施步骤,并通过对SIR-C/X-SAR的L波段实际数据进行验证处理,表明酉ESPRIT算法十分有效。
关键词(KeyWords)： 极化干涉SAR;酉ESPRIT;相位估计
基金项目(Foundation):
作者(Author): 杨磊,赵拥军,王志刚
参考文献(References)：
- [1]S R Cloude,K P Papathanassiou.Polarimetric SAR in-terferometry[J].IEEE Trans.Geosci.Remote Sens-ing,1998,36:1551-1565.
- [2]S R Cloude,D Corr.Tree Height Retrieval using Single Baseline Polarimetric Interferometry[A].In:Proceed-ings of ESA Worksho P,POLInSAR2003[C],Frasca-ti,Italy,January2003:14-16.
- [3]S R Cloude,and K PPapathanassiou.A3-Stage Inver-sion Process for Polarimetric SAR Interferometry[A].In:Proceedings of European Conference on Synthetic Ap-erture Radar,EUSAR'02[C],Cologne,Germany,4-6June2002:279-282.
- [4]S Guillaso,L Ferro-Famil,A Reigber,and E Pottier.Analysis of Built-U PAreas from Polarimetric Interfero-metric[A].In:Proceedings of IGARSS'03[A].Tou-louse,France,vol.3July2003:1727-1729.
- [5]S Guillaso,AReigber,and L Ferro-Famil.Evaluation of the ESPRITApproach in Polarimetric Interferometric SAR[A].In:IGARSS’05,vol.1[C],Korea Jul.2005:32-35.
- [6]S Guillaso,L Ferro-Famil,A Reigber,and E Pottier.Building Characterisation Using L-Band Polarimetric In-terferometric SAR Data[J].IEEE Geoscience and Re-mote Sensing Letters,July2005,2(3):347-351.
- [7]Yamada Het al.Polarimetric SAR interferometry for for-est analysis based on the ESPRIT algorithm[J].IEICE Trans.Electron.,vol E84-C,2001:1917-1924.
- [8]Dayalan Kasilingam,Madhukar Nomula and Shane Cloude A Technique for Removing Vegetation Bias from Polarimetric SAR Interferometry[J],Geoscience and Remote Sensing Symposium,IGARSS’02,2:1017-1019July2002.
- [9]R Roy and T Kailath.ESPRIT-Estimation of signal pa-rameters via rotational invariance techniques[J].IEEE Trans.Acoust.,Speech and Signal Processing,1989,37(7):984-955.
- [10]Haardt M,Nossek J A.Unitary ESPRIT:How to obtain increased estimation accuracy with a reduced computa-tional burden[J].IEEE Trans.Signal Processing,1995,43:1232-1242.
- [11]K PPapathanassiou,S R Cloude.Single Baseline Polari-metric SAR Interferometry[J].IEEE Transacfim Geo-science and Remote Sensing,vol.November2001,39(11):2352-2363.
- [12]S R Cloude.Robust Parameter Estimation using dual baseline polarimetric SAR Interferometry[J].proceed-ings of IEEE International Geoscience and Remote Sens-ing Symposium IGARSS’02,Tomnto,Canada,2002,2:838-840.
- [13]Lee A Centrohermitian and skew-centrohermitian matri-ces[J].Linear Algebra and Its Applications,1980,29:205-210.