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Assessment of Image Quality of Waveform-Encoded Synthetic Aperture Radar Using Real Satellite Data

Dell Amore, Luca and Villano, Michelangelo and Krieger, Gerhard (2019) Assessment of Image Quality of Waveform-Encoded Synthetic Aperture Radar Using Real Satellite Data. In: Proceedings International Radar Symposium. International Radar Symposium (IRS), 2019-06-26 - 2019-06-28, Ulm, Germany.

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Abstract

Synthetic aperture radar (SAR) remote sensing is very attractive for the systematic observation of dynamic processes on the Earth’s surface since it allows high resolution imaging independently of weather conditions and sunlight illumination. Waveform-encoded SAR is a novel SAR concept based on pulse-to-pulse variation of the transmitted waveform that allows focusing the nadir echo and the range ambiguities and suppressing them through a multi-focus post-processing. However, the assessment of the ambiguity suppression performance for such a system is not trivial, as the processing involves a (non-linear) thresholding and blanking approach. This work proposes a novel methodology, which exploits real TerraSAR-X data to accurately simulate the effect of the range ambiguity on the useful signal and allows for a quantitative assessment of the image quality of a waveform-encoded SAR. The analysis considers different waveform variation schemes (e.g., up- and down-chirps, cyclicallyshifted chirps) and a contrast-minimization technique for threshold selection, whose performance is compared to the best achievable one (i.e., optimum threshold). The results of this work further highlight the potentialities of the waveform-encoded SAR concept and also allow accounting for its ambiguity suppression capability in the design of a SAR system.

Item URL in elib:https://elib.dlr.de/129340/
Document Type:Conference or Workshop Item (Speech)
Title:Assessment of Image Quality of Waveform-Encoded Synthetic Aperture Radar Using Real Satellite Data
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Dell Amore, LucaLuca.DellAmore (at) dlr.deUNSPECIFIED
Villano, MichelangeloMichelangelo.Villano (at) dlr.dehttps://orcid.org/0000-0002-1769-6927
Krieger, GerhardGerhard.Krieger (at) dlr.dehttps://orcid.org/0000-0002-4548-0285
Date:June 2019
Journal or Publication Title:Proceedings International Radar Symposium
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Status:Published
Keywords:Synthetic aperture radar (SAR), range ambiguities, pulse-to-pulse waveform variation, matched filter, multi-focus post-processing, contrast minimization, optimal threshold, local ambiguity-to-signal ratio.
Event Title:International Radar Symposium (IRS)
Event Location:Ulm, Germany
Event Type:international Conference
Event Dates:2019-06-26 - 2019-06-28
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 Entwicklung eines Mini-SAR
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Dell Amore, Luca
Deposited On:14 Oct 2019 08:56
Last Modified:12 Jan 2020 15:30

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