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Radar imaging using electrically large arrays with high range resolution at 160 GHz

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peer-reviewed

Erstveröffentlichung
2021-02-03
Authors
Dürr, André
Schneele, Benedikt
Schwarz, Dominik
Waldschmidt, Christian
Beitrag zu einer Konferenz


Published in
European Microwave Week 2020 Conference Proceedings ; 2020 (2021). - S. 326-329. - ISBN 978-2-87487-058-3
Link to original publication
https://dx.doi.org/10.1109/EuRAD48048.2021.00090
Faculties
Fakultät für Ingenieurwissenschaften, Informatik und Psychologie
Institutions
Institut für Mikrowellentechnik
Document version
accepted version
Conference
European Radar Conference (EURAD), 2021-01-10 - 2021-01-15, Utrecht (online only)
Abstract
In order to improve the resolution of imaging radars, electrically large arrays and high absolute bandwidths are required. At a large off-boresight angle of the incident wave, the difference in path length at the antennas becomes a multiple of the range resolution of the radar. Consequently, the radar responses of the targets at the different receiving channels are distributed over a large number of range bins, depending on the direction-of-arrival (DoA) of the target echo. Applying conventional signal processing, the resolution of the radar is considerably reduced. In this paper, the key aspects of DOA estimation are discussed when radars with both a large aperture size and a high absolute bandwidth are employed. A signal processing method is proposed avoiding errors that occur in conventional DOA estimation techniques. As shown by measurements, an angular resolution of 0.4° can be achieved with an array size of 200 lambda and a bandwidth of 10GHz.
DFG Project THU
binoMIMO / Hochauflösende binokulare MIMO-Millimeterwellen-Radare (binoMIMO) / DFG / 317632307
Subject headings
[GND]: MIMO | Radar
[LCSH]: Imaging systems | Millimeter waves | Antenna arrays | MIMO systems | Radar
[Free subject headings]: direction-of-arrival estimation | imaging radar | large antenna arrays | millimeter wave radar | multiple-input multiple-output radar
[DDC subject group]: DDC 620 / Engineering & allied operations
License
Standard
https://oparu.uni-ulm.de/xmlui/license_v3

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DOI & citation

Please use this identifier to cite or link to this item: http://dx.doi.org/10.18725/OPARU-37412

Dürr, André et al. (2021): Radar imaging using electrically large arrays with high range resolution at 160 GHz. Open Access Repositorium der Universität Ulm und Technischen Hochschule Ulm. http://dx.doi.org/10.18725/OPARU-37412
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