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SAR Signal Reconstruction from Non-Uniform Displaced Phase Centre Sampling in the Presence of Perturbations

Gebert, Nicolas and Krieger, Gerhard and Moreira, Alberto (2005) SAR Signal Reconstruction from Non-Uniform Displaced Phase Centre Sampling in the Presence of Perturbations. In: 2005 IEEE International Geoscience and Remote Sensing Symposium Proceedings. IGARSS International Geoscience and Remote Sensing Symposium, 2005-07-25 - 2005-07-29, Seoul, Korea. ISBN 0-7803-9050-4 (DVD-Rom).

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Abstract

The displaced phase centre (DPC) technique enables a wide swath SAR with high azimuth resolution. In classic DPC systems, the pulse repetition frequency (PRF), sensor velocity and antenna length underlie a stringent timing requirement and any deviation will result in a non-uniform sampling of the syn­thetic aperture. This restriction can be overcome by the use of a recon­struction algorithm, which enables a recovery of the unambiguous Doppler spectrum also in case of a non-uniform sampling. This paper ex­plains limitations of the reconstruction imposed by the processing and the impacts on the ambiguity suppression. The potential of the algorithm when applied to DPC systems like TerraSAR-X with its split receive antenna is demon­strated and the benefits re­sulting from the additional receive ap­ertur e regarding swath width and resolution are pointed out. Further on, the impact of ad­ditive and phase noise on the recon­struction and its sensitivity against these perturbations are shown.

Document Type:Conference or Workshop Item (Paper)
Additional Information:LIDO-Berichtsjahr=2005
Title:SAR Signal Reconstruction from Non-Uniform Displaced Phase Centre Sampling in the Presence of Perturbations
Authors:
AuthorsInstitution or Email of Authors
Gebert, NicolasUNSPECIFIED
Krieger, GerhardUNSPECIFIED
Moreira, AlbertoUNSPECIFIED
Date:2005
Journal or Publication Title:2005 IEEE International Geoscience and Remote Sensing Symposium Proceedings
Editors:
EditorsEmail
IEEE Operations Center, UNSPECIFIED
Series Name:IEEE International Geoscience and Remote Sensing Symposium Proceedings
ISBN:0-7803-9050-4 (DVD-Rom)
Status:Published
Keywords:High Resolution Wide Swath SAR Imaging, HRWS, Digital Beamforming
Event Title:IGARSS International Geoscience and Remote Sensing Symposium
Event Location: Seoul, Korea
Event Type:international Conference
Event Dates:2005-07-25 - 2005-07-29
Organizer:IEEE
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 Entwicklung eines Mini-SAR (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute
Deposited By: Nicolas Gebert
Deposited On:03 Feb 2006
Last Modified:14 Jan 2010 19:46

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