Coherent Shift Estimation for Stacks of SAR Images

Author

De Zan, Francesco

Author_Institution

Microwaves & Radar Inst., German Aerosp. Center (DLR), Wessling, Germany

Volume

8

Issue

6

fYear

2011

Firstpage

1095

Lastpage

1099

Abstract

Speckle tracking is used with synthetic aperture radar (SAR) images to estimate displacements, in ways that support or integrate interferometric measurements. This letter derives Fisher information expressions for the displacement estimation using coherent speckle tracking, for the multi-image scenario with an arbitrary coherence structure. Previous results were limited to image pairs. An estimator that approaches the theoretical bound is also proposed, establishing a link with phase estimation for multi-image SAR interferometry. The derivation of the Fisher information is given in the general case when the coherence is a function of the frequency.

Keywords

displacement measurement; matrix algebra; radar imaging; radar interferometry; speckle; synthetic aperture radar; Fisher information matrix; SAR image stacks; coherent shift estimation; displacement estimation; interferometric measurements; link with phase estimation; multiimage SAR interferometry; speckle tracking; synthetic aperture radar images; Coherence; Covariance matrix; Delay; Estimation; Interferometry; Radar tracking; Speckle; Covariance matrices; SAR interferometry; delay estimation; maximum likelihood estimation; synthetic aperture radar (SAR);

fLanguage

English

Journal_Title

Geoscience and Remote Sensing Letters, IEEE

Publisher

ieee

ISSN

1545-598X

Type

jour

DOI

10.1109/LGRS.2011.2157079

Filename

5875867