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Ambiguity Suppression by Azimuth Phase Coding in Multichannel SAR Systems

Bordoni, Federica and Younis, Marwan and Krieger, Gerhard (2011) Ambiguity Suppression by Azimuth Phase Coding in Multichannel SAR Systems. IEEE Transactions on Geoscience and Remote Sensing.

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The current generation of spaceborne Synthetic Aperture Radar (SAR) systems suffers from a trade-off between the achievable spatial resolution and swath width. This has motivated intensive research both on more flexible SAR systems, using multiple transmit/receive channels, and on techniques for removing the ambiguities. Among these techniques, the Azimuth Phase Coding (APC), recently proposed to suppress range ambiguities in conventional SAR systems, stands out for its negligible implementation complexity and its effectiveness for point and distributed ambiguities. This paper investigates the possibility of applying the APC technique to the new, forthcoming generation of multichannel SAR systems, based on Digital Beamforming on receive. The extension of APC to multichannel SAR systems is mathematically described. Specific merit figures are defined to quantify the APC performance. A numerical analysis is developed to characterize the influence on the APC behaviors of the main SAR system parameters. Finally, an example of APC performance is provided, by considering two multichannel SAR systems based on a planar and a reflector antenna.

Document Type:Article
Title:Ambiguity Suppression by Azimuth Phase Coding in Multichannel SAR Systems
AuthorsInstitution or Email of Authors
Bordoni, FedericaUNSPECIFIED
Krieger, GerhardUNSPECIFIED
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Keywords:Synthetic Aperture Radar (SAR), Digital Beam-Forming (DBF), Azimuth Phase Coding (APC)
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 > Radar Concepts
Microwaves and Radar Institute
Deposited By: Dr. Federica Bordoni
Deposited On:08 Jul 2011 13:52
Last Modified:07 Feb 2013 20:22

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