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Joint effects of on-board Doppler filtering and quantization in spaceborne SAR systems

Villano, Michelangelo and Martone, Michele and Del Zoppo, Vincenzo and Krieger, Gerhard (2014) Joint effects of on-board Doppler filtering and quantization in spaceborne SAR systems. IEEE GOLD Remote Sensing Conference 2014, 2014-06-05 - 2014-06-06, Berlin, Germany.

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Abstract

A novel strategy for data volume reduction in spaceborne synthetic aperture radar (SAR) system has been recently proposed, which consists of low-pass filtering and decimating the data prior to downlink and compensating for the filter’s transfer function in the processing. However, if data are further quantized prior to downlink, an amplification of the quantization noise may occur, when compensating for the transfer function of the filter. In a context of data volume reduction, data are likely to be quantized. This paper analyzes the joint effects of on-board Doppler filtering and block-adaptive quantization (BAQ) in spaceborne synthetic aperture radar (SAR) systems. For the present analysis, SAR raw data acquired by the German satellite TerraSAR-X are used. As is apparent, the removal of the high Doppler frequency components by a low-pass filter leads to better performance in terms of noise equivalent sigma zero (NESZ) for the same quantization rate. However, if the transfer function of the filter is not flat in the processed bandwidth, an amplification of the quantization noise occurs, when compensating for the filter’s transfer function in the processing.

Item URL in elib:https://elib.dlr.de/89428/
Document Type:Conference or Workshop Item (Speech)
Title:Joint effects of on-board Doppler filtering and quantization in spaceborne SAR systems
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Villano, MichelangeloUNSPECIFIEDUNSPECIFIED
Martone, MicheleUNSPECIFIEDUNSPECIFIED
Del Zoppo, VincenzoUniversity of CataniaUNSPECIFIED
Krieger, GerhardUNSPECIFIEDUNSPECIFIED
Date:June 2014
Refereed publication:No
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, block adaptive quantization (BAQ), noise equivalent sigma zero (NESZ), TerraSAR-X.
Event Title:IEEE GOLD Remote Sensing Conference 2014
Event Location:Berlin, Germany
Event Type:international Conference
Event Dates:2014-06-05 - 2014-06-06
Organizer:IEEE
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
Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Villano, Dr.-Ing. Michelangelo
Deposited On:16 Jun 2014 08:47
Last Modified:31 Jul 2019 19:46

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