Title :
Statistical study of the H/A/ᾱ decomposition based on a perturbation analysis of the coherency matrix
Author :
Lopez-Martinez, Carlos ; Alonso, Alberto
Author_Institution :
Signal Theor. & Commun. Dept. (TSC), Univ. Politec. de Catalunya (UPC), Barcelona, Spain
Abstract :
The eigendecomposition of the coherency matrix, as well as the Entropy, Anisotropy and mean Alpha angle are crucial for the physical understanding of the scattered echo in SAR polarimetry. This contribution considers a perturbation analysis of the coherency matrix that allows the statistical characterization of all the previous parameters. In addition, a novel and effective algorithm for the unbiased estimation of the Entropy parameter is presented.
Keywords :
echo; eigenvalues and eigenfunctions; entropy; matrix algebra; perturbation techniques; radar polarimetry; remote sensing by radar; statistical analysis; synthetic aperture radar; SAR polarimetry; coherency matrix; eigendecomposition; entropy parameter; mean alpha angle; perturbation analysis; scattered echo; statistical characterization; unbiased estimation; Anisotropic magnetoresistance; Covariance matrices; Eigenvalues and eigenfunctions; Entropy; Matrix decomposition; Noise; Speckle;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2013 IEEE International
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4799-1114-1
DOI :
10.1109/IGARSS.2013.6723748
