Krieger, Gerhard and Rommel, Tobias and Moreira, Alberto (2016) MIMO-SAR Tomography. In: Proceedings of the 11th European Conference on Synthetic Aperture Radar (EUSAR), pp. 91-96. VDE. European Conference on Synthetic Aperture Radar (EUSAR), 2016-06-06 - 2016-06-09, Hamburg, Germany. ISBN 978-3-8007-4228-8. ISSN 2197-4403.
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Abstract
MIMO SAR employs multiple transmit and receive channels to improve the imaging performance and to acquire novel geo-information products. One example is SAR tomography, where the simultaneous transmission and reception with multiple antennas can provide a large number of baselines with a small number of antennas. In the limit, an appropriately designed MIMO-SAR configuration with N_Tx transmitters and N_Rx receivers can provide in total N_Tx∙N_Rx independent phase centers and therefore N_Tx∙N_Rx-1 independent baselines for SAR tomography. The other extreme is provided by uniform linear arrays with co-located transmitters and receivers. Such configurations are characterized by a large number of overlapping effective phase centers and are therefore regarded as highly redundant. In this paper, we will show that such a redundancy is nevertheless well suited to resolve an inherent challenge of conventional SAR tomography, which is limited in providing unambiguous 3-D scatterer position estimates in case of multiple scattering. For this, we show that redundant MIMO arrays allow not only an a posteriori beamforming on receive, but, at the same time, also a comparable a posteriori (i.e. after data acquisition) beamforming on transmit. This means that one can emulate, from one and the same recorded MIMO-SAR data set, different illumination scenarios on transmit and receive. By evaluating the 2-D spectrum provided by the independent Tx and Rx beams, it becomes then possible to differentiate between single- and multiple-bounce scattering. The separation between single- and double-bounce scattering has also been successfully demonstrated in a ground-based radar experiment and is presented in another EUSAR paper.
Item URL in elib: | https://elib.dlr.de/104701/ | ||||||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||
Title: | MIMO-SAR Tomography | ||||||||||||||||
Authors: |
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Date: | June 2016 | ||||||||||||||||
Journal or Publication Title: | Proceedings of the 11th European Conference on Synthetic Aperture Radar (EUSAR) | ||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||
Open Access: | Yes | ||||||||||||||||
Gold Open Access: | No | ||||||||||||||||
In SCOPUS: | No | ||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||
Page Range: | pp. 91-96 | ||||||||||||||||
Publisher: | VDE | ||||||||||||||||
ISSN: | 2197-4403 | ||||||||||||||||
ISBN: | 978-3-8007-4228-8 | ||||||||||||||||
Status: | Published | ||||||||||||||||
Keywords: | MIMO-SAR, tomography, interferometry, single-pass, repeat-pass, single bounce, double bounce, scattering | ||||||||||||||||
Event Title: | European Conference on Synthetic Aperture Radar (EUSAR) | ||||||||||||||||
Event Location: | Hamburg, Germany | ||||||||||||||||
Event Type: | international Conference | ||||||||||||||||
Event Start Date: | 6 June 2016 | ||||||||||||||||
Event End Date: | 9 June 2016 | ||||||||||||||||
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 - Development of a mini-SAR, R - SAR missions, R - SAR methods, R - SAR Expert Support Lab | ||||||||||||||||
Location: | Oberpfaffenhofen | ||||||||||||||||
Institutes and Institutions: | Microwaves and Radar Institute > Radar Concepts | ||||||||||||||||
Deposited By: | Krieger, Dr.-Ing. Gerhard | ||||||||||||||||
Deposited On: | 17 Jun 2016 08:01 | ||||||||||||||||
Last Modified: | 24 Apr 2024 20:10 |
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