NDLI: A New Strategy to Estimate Local Fringe Frequencies for InSAR Phase Noise Reduction

Content Provider	IEEE Xplore Digital Library
Author	Zhiyong Suo Zhenfang Li Zheng Bao
Copyright Year	2004
Abstract	A new approach is presented to estimate the fringe frequencies in interferometric synthetic aperture radar (InSAR) phase image. A first-order model is usually used for fringe frequency estimation, but in steep regions or low-correlation regions, it often fails. In this letter, a prefiltered interferogram, obtained by the slope-compensated or conventional mean filter, is divided into small patches and unwrapped separately. Subsequently, we differentiate the local-phase-unwrapping results to obtain the fringe frequencies. Furthermore, the invalid fringe frequencies are eliminated by a statistical threshold. Finally, the interferogram is filtered by compensating the estimated fringe frequencies in the averaging window of the mean filter. The proposed method can obtain continuous fringe frequency estimation, and it is not constrained by the first-order model. The effectiveness of the proposed approach is verified by the simulated and real InSAR data.
Sponsorship	IEEE Geoscience and Remote Sensing Society
Starting Page	771
Ending Page	775
Page Count	5
File Size	1233224
File Format	PDF
ISSN	1545598X
Volume Number	7
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency estimation Phase estimation Synthetic aperture radar interferometry Phase noise Filtering Decorrelation Adaptive filters Maximum likelihood estimation Multiple signal classification Synthetic aperture radar synthetic aperture radar (SAR) Fringe frequency estimation interferometry phase noise filtering phase unwrapping
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Geotechnical Engineering and Engineering Geology

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