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Phase-Scale Analysis of Complex-Valued SAR Images

Datcu, Mihai and Singh, Jagmal (2014) Phase-Scale Analysis of Complex-Valued SAR Images. In: Proceedings of EUSAR 2014; 10th European Conference on Synthetic Aperture Radar, pp. 1121-1124. VDE Verlag. EUSAR 2014, 03-05 June 2014, Berlin, Germany. ISBN 978-3-8007-3607-2.

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Official URL: https://www.vde-verlag.de/proceedings-en/453607290.html


The extraction of different parts of the spectrum from complex-valued synthetic aperture radar (SAR) images is equivalent to selecting a same number of low-resolution images, each of which is acquired using a sub-antenna. This subantenna can be viewed as a part of azimuth squint angle and a part of the range chirp bandwidth in the full synthetic aperture. Due to this process, which is also called sub-aperture extraction, it is not possible to apply traditional bandpass filters to complex-valued SAR images using modulated window-based multi-scale approaches (such as wavelet decomposition). Thus, in this paper we proposes the use of a chirplet-derived transform, that is, the fractional Fourier transform (FrFT), as an alternative scaling approach, where the scaling is carried out in phase. We also underline the physical significance of classical wavelet decomposition for complex-valued SAR images, demonstrating that this is equivalent to a modulated sub-aperture extraction or aspect angle filtering rather than shape filtering.

Item URL in elib:https://elib.dlr.de/94371/
Document Type:Conference or Workshop Item (Speech)
Title:Phase-Scale Analysis of Complex-Valued SAR Images
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Datcu, Mihaimihai.datcu (at) dlr.deUNSPECIFIED
Singh, Jagmaljagmal.singh (at) dlr.deUNSPECIFIED
Journal or Publication Title:Proceedings of EUSAR 2014; 10th European Conference on Synthetic Aperture Radar
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1121-1124
EditorsEmailEditor's ORCID iD
Publisher:VDE Verlag
Keywords:SAR Images
Event Title:EUSAR 2014
Event Location:Berlin, Germany
Event Type:international Conference
Event Dates:03-05 June 2014
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Vorhaben hochauflösende Fernerkundungsverfahren (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Photogrammetry and Image Analysis
Deposited On:08 Jan 2015 16:38
Last Modified:08 Jan 2015 16:38

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