Coherent Shift Estimation for Stacks of SAR Images

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 scena...

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Bibliographic Details
Published in:IEEE geoscience and remote sensing letters 2011-11, Vol.8 (6), p.1095-1099
Main Author: De Zan, F.
Format: Article
Language:English
Subjects:
Coherence
Covariance matrices
Covariance matrix
Delay
delay estimation
Derivation
Estimation
Estimators
Interferometry
maximum likelihood estimation
Radar tracking
SAR interferometry
Speckle
Stacks
Synthetic aperture radar
synthetic aperture radar (SAR)
Tracking
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Description
Summary: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.
ISSN:1545-598X
1558-0571
DOI:10.1109/LGRS.2011.2157079