Mathematical Framework for Phase-Triangulation Algorithms in Distributed-Scatterer Interferometry

Ning Cao; Hyongki Lee; Hahn Chul Jung

doi:10.1109/LGRS.2015.2430752

Mathematical Framework for Phase-Triangulation Algorithms in Distributed-Scatterer Interferometry

Ning Cao, Hyongki Lee, Hahn Chul Jung

Department of Earth System Sciences

Research output: Contribution to journal › Article › peer-review

Abstract

To improve the spatial density of measurement points of persistent-scatterer interferometry, distributed scatterer (DS) should be considered and processed. An important procedure in DS interferometry is the phase triangulation (PT). This letter introduces two modified PT algorithms (i.e., equal-weighted PT and coherence-weighted PT) and analyzes the mathematical relations between different published PT methods (i.e., the maximum-likelihood phase estimator, least squares estimator, and eigendecomposition-based phase estimators). The analysis shows that the above five PT methods share very similar mathematical forms with different weight values in the estimation procedure.

Original language	English
Article number	7111268
Pages (from-to)	1838-1842
Number of pages	5
Journal	IEEE Geoscience and Remote Sensing Letters
Volume	12
Issue number	9
DOIs	https://doi.org/10.1109/LGRS.2015.2430752
Publication status	Published - 2015 Sept 1

Bibliographical note

Publisher Copyright:
© 2004-2012 IEEE.

All Science Journal Classification (ASJC) codes

Geotechnical Engineering and Engineering Geology
Electrical and Electronic Engineering

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10.1109/LGRS.2015.2430752

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abstract = "To improve the spatial density of measurement points of persistent-scatterer interferometry, distributed scatterer (DS) should be considered and processed. An important procedure in DS interferometry is the phase triangulation (PT). This letter introduces two modified PT algorithms (i.e., equal-weighted PT and coherence-weighted PT) and analyzes the mathematical relations between different published PT methods (i.e., the maximum-likelihood phase estimator, least squares estimator, and eigendecomposition-based phase estimators). The analysis shows that the above five PT methods share very similar mathematical forms with different weight values in the estimation procedure.",

author = "Ning Cao and Hyongki Lee and Jung, {Hahn Chul}",

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AB - To improve the spatial density of measurement points of persistent-scatterer interferometry, distributed scatterer (DS) should be considered and processed. An important procedure in DS interferometry is the phase triangulation (PT). This letter introduces two modified PT algorithms (i.e., equal-weighted PT and coherence-weighted PT) and analyzes the mathematical relations between different published PT methods (i.e., the maximum-likelihood phase estimator, least squares estimator, and eigendecomposition-based phase estimators). The analysis shows that the above five PT methods share very similar mathematical forms with different weight values in the estimation procedure.

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Mathematical Framework for Phase-Triangulation Algorithms in Distributed-Scatterer Interferometry

Abstract

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