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On-Board Doppler Filtering for Data Volume Reduction in Spaceborne SAR Systems

Villano, Michelangelo and Krieger, Gerhard and Del Zoppo, Vincenzo (2014) On-Board Doppler Filtering for Data Volume Reduction in Spaceborne SAR Systems. International Radar Symposium 2014, 2014-06-16 - 2014-06-18, Gdansk, Poland.

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Abstract

High-resolution wide-swath (HRWS) synthetic aperture radar (SAR) systems based on digital beamforming (DBF) in elevation are very attractive for the observation of dynamic processes on the Earth’s surface. However, HRWS systems are inherently associated with a huge data volume. Moreover, in order to comply with azimuth ambiguity requirements, a pulse repetition frequency (PRF) much higher than the required processed Doppler bandwidth is often desirable. The data volume can be drastically reduced, if on-board Doppler filtering and decimation are performed prior to downlink. A finite impulse response (FIR) filter with a relatively small number of taps suffices to completely suppress the additional ambiguous components and recover the original impulse response, provided that the filter’s transfer function is compensated for in the processing. This strategy is also applicable to staggered-SAR systems, where on-board Doppler filtering and resampling can be jointly implemented.

Item URL in elib:https://elib.dlr.de/89557/
Document Type:Conference or Workshop Item (Speech)
Title:On-Board Doppler Filtering for Data Volume Reduction in Spaceborne SAR Systems
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Villano, MichelangeloUNSPECIFIEDUNSPECIFIED
Krieger, GerhardUNSPECIFIEDUNSPECIFIED
Del Zoppo, VincenzoUniversity of CataniaUNSPECIFIED
Date:June 2014
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Synthetic aperture radar (SAR), high-resolution wide-swath (HRWS) SAR imaging, staggered SAR, data volume, on-board Doppler filtering.
Event Title:International Radar Symposium 2014
Event Location:Gdansk, Poland
Event Type:international Conference
Event Dates:2014-06-16 - 2014-06-18
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Tandem-L Vorstudien
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Villano, Dr.-Ing. Michelangelo
Deposited On:23 Jun 2014 15:35
Last Modified:31 Jul 2019 19:46

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