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

Ning Cao, Hyongki Lee, Hahn Chul Jung

Research output: Contribution to journalArticlepeer-review


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 languageEnglish
Article number7111268
Pages (from-to)1838-1842
Number of pages5
JournalIEEE Geoscience and Remote Sensing Letters
Issue number9
Publication statusPublished - 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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