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Efficient on-board quantization for interferometric and multi-channel SAR systems

Martone, Michele and Rizzoli, Paola and Krieger, Gerhard (2017) Efficient on-board quantization for interferometric and multi-channel SAR systems. In: 2003 Proceedings of the International Conference on Radar, RADAR 2003, pp. 1-6. IET International Conference on Radar Systems (Radar), 2017-10-23 - 2017-10-26, Belfast, Great Britain.

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Abstract

In synthetic aperture radar (SAR) applications, raw data quantization represents an aspect of primary importance, since the number of bits employed for radar signal digitization on the one hand defines the on-board memory consumption and the data volume to be transmitted to the ground, while on the other hand it affects the quality of SAR images. In this paper, we discuss a novel approach for efficient raw data quantization for interferometric and multi-channel SAR systems, which aims at optimizing the resource allocation strategy as a function of the specific interferometric acquisition requirements. Once the required performance is set (in terms e.g. of phase error or coherence loss), the resulting bitrate is defined according to the expected performance degradation. This is estimated with the help of a priori information, such as high-resolution backscatter statistics as well as coherence maps, which are available e.g. from the latest global data set provided by TanDEM-X (X-band) or Sentinel-1 (C-band). Finally, the desired non-integer compression rate is achieved by dynamically toggling the integer quantization rate of a standard block adaptive quantizer (BAQ). Hence, higher flexibility in terms of performance design and resource allocation can be achieved, without increasing the complexity and the computational load of the quantization scheme.

Item URL in elib:https://elib.dlr.de/113901/
Document Type:Conference or Workshop Item (Speech)
Title:Efficient on-board quantization for interferometric and multi-channel SAR systems
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Martone, MicheleUNSPECIFIEDhttps://orcid.org/0000-0002-4601-6599
Rizzoli, PaolaUNSPECIFIEDhttps://orcid.org/0000-0001-9118-2732
Krieger, GerhardUNSPECIFIEDhttps://orcid.org/0000-0002-4548-0285
Date:2017
Journal or Publication Title:2003 Proceedings of the International Conference on Radar, RADAR 2003
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Page Range:pp. 1-6
Status:Published
Keywords:TanDEM-X mission, synthetic aperture radar Interferometry (InSAR), data compression, block adaptive quantization (BAQ)
Event Title:IET International Conference on Radar Systems (Radar)
Event Location:Belfast, Great Britain
Event Type:international Conference
Event Dates:2017-10-23 - 2017-10-26
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 - Projekt TanDEM-X
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Spaceborne SAR Systems
Microwaves and Radar Institute > Radar Concepts
Deposited By: Martone, Michele
Deposited On:05 Sep 2017 13:32
Last Modified:05 Feb 2018 18:14

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