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/ | ||||||||||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||||||
Title: | Joint effects of on-board Doppler filtering and quantization in spaceborne SAR systems | ||||||||||||||||||||
Authors: |
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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 - Earth Observation | ||||||||||||||||||||
DLR - Research theme (Project): | R - Vorhaben Tandem-L Vorstudien (old) | ||||||||||||||||||||
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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