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Digital Beamforming and Non-Uniform Displaced Phase Centre Sampling in Bi- and Multistatic SAR

Krieger, Gerhard and Gebert, Nicolas and Moreira, Alberto (2004) Digital Beamforming and Non-Uniform Displaced Phase Centre Sampling in Bi- and Multistatic SAR. In: European Conference on Synthetic Aperture Radar (EUSAR), 2, pp. 563-566. VDE Verlag. European Conference on Synthetic Aperture Radar (EUSAR), 2004-05-25 - 2004-05-27, Ulm, Germany. ISBN 3-8007-2828-1.

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Abstract

The displaced phase centre (DPC) technique will enable a wide swath SAR with high azimuth resolution. In a classic DPC system, the PRF has to be chosen such that the SAR carrier moves just one half of its antenna length between subsequent radar pulses. Any deviation from this PRF will result in a non-uniform sampling of the synthetic aperture. This paper shows that an unambiguous reconstruction of the SAR signal is also possible in case of such a non-optimum PRF. For this, an innovative reconstruction algorithm is derived, which enables a recovery of the unambiguous Doppler spectrum also in case of a non-uniform sampling of the synthetic aperture. This algorithm will also have a great potential for multistatic satellite constellations as well as the dual receive antenna mode in Radarsat 2 and TerraSAR-X.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Digital Beamforming and Non-Uniform Displaced Phase Centre Sampling in Bi- and Multistatic SAR
Authors:
AuthorsInstitution or Email of Authors
Krieger, GerhardUNSPECIFIED
Gebert, NicolasUNSPECIFIED
Moreira, AlbertoUNSPECIFIED
Date:2004
Journal or Publication Title:European Conference on Synthetic Aperture Radar (EUSAR)
Refereed publication:No
In ISI Web of Science:No
Volume:2
Page Range:pp. 563-566
Publisher:VDE Verlag
ISBN:3-8007-2828-1
Status:Published
Keywords:ambiguity suppression, digital beamforming, multistatic SAR, high resolution wide swath (HRWS) SAR
Event Title:European Conference on Synthetic Aperture Radar (EUSAR)
Event Location:Ulm, Germany
Event Type:international Conference
Event Dates:2004-05-25 - 2004-05-27
Organizer:VDE ITG
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
Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Dr.-Ing. Gerhard Krieger
Deposited On:11 Aug 2006
Last Modified:12 Dec 2013 19:56

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