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Multi-signal Compressed Sensing For Polarimetric SAR Tomography

Aguilera, Esteban and Nannini, Matteo and Reigber, Andreas (2011) Multi-signal Compressed Sensing For Polarimetric SAR Tomography. In: Proceedings of IEEE International Geoscience and Remote Sensing Symposium (IGARSS), pp. 1369-1372. IEEE. IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2011-07-24 - 2011-07-29, Vancouver, Canada.

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Abstract

In recent years, three-dimensional imaging by means of SAR tomography has become a field of intensive research. In SAR tomography, the vertical reflectivity function for every azimuth-range pixel is usually recovered by processing data collected using a defined repeat pass acquisition geometry. The most common approach is to generate a synthetic aperture in the elevation direction through imaging from a large number of parallel tracks. This imaging technique is appealing, since it is very simple. However, it has the drawback that large temporal baselines, which is the case for space-borne platforms, can severely affect the reconstruction. In an attempt to reduce the number of parallel tracks, we propose a new tomographic focusing approach that trades number of SAR images for correlations between neighboring azimuth-range pixels and polarimetric channels. As a matter of fact, this can be done under the framework of Distributed Compressed Sensing (DCS), which stems from Compressed Sensing (CS) theory, thus also exploiting sparsity in our tomographic signal. In addition, we address the problem of measurements affected by additive as well as multiplicative speckle noise. Results demonstrating the potential of the DCS methodology will be validated by using fully polarimetric L-band data acquired by the E-SAR sensor of DLR.

Document Type:Conference or Workshop Item (Speech)
Title:Multi-signal Compressed Sensing For Polarimetric SAR Tomography
Authors:
AuthorsInstitution or Email of Authors
Aguilera, EstebanUNSPECIFIED
Nannini, MatteoUNSPECIFIED
Reigber, AndreasUNSPECIFIED
Date:26 July 2011
Journal or Publication Title:Proceedings of IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
Refereed publication:Yes
Page Range:pp. 1369-1372
Publisher:IEEE
Status:Published
Keywords:SAR tomography, polarimetry, compressed sensing, distributed compressed sensing
Event Title:IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
Event Location:Vancouver, Canada
Event Type:international Conference
Event Dates:2011-07-24 - 2011-07-29
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Flugzeug-SAR (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > SAR Technology
Deposited By: Esteban Pedro Aguilera
Deposited On:16 Mar 2012 10:14
Last Modified:21 Mar 2014 15:04

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