Record link: 
http://hdl.handle.net/20.500.12708/192233
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Title: 
Misfocus-Reduction in RIS-Assisted Ultra-Wideband Wireless Communication
de
Citation: 
Huang, Z., Prüller, R., Schwarz, S., & Rupp, M. (2023). Misfocus-Reduction in RIS-Assisted Ultra-Wideband Wireless Communication. In 2023 Joint European Conference on Networks and Communications & 6G Summit (EuCNC/6G Summit) (pp. 108–113). IEEE. https://doi.org/10.1109/EuCNC/6GSummit58263.2023.10188288
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Publisher DOI: 
10.1109/EuCNC/6GSummit58263.2023.10188288
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Publication Type: 
Inproceedings - Full-Paper Contribution
en
Language: 
English
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Authors: 
Huang, Zeyu 
Prüller, Richard 
Schwarz, Stefan 
Rupp, Markus 
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Organisational Unit: 
E389-02 - Forschungsbereich Wireless Communications 
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Published in: 
2023 Joint European Conference on Networks and Communications & 6G Summit (EuCNC/6G Summit) 
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ISBN: 
979-8-3503-1102-0
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DOI of the book: 
10.1109/EuCNC/6GSummit58263.2023
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Date (published): 
2023
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Event name: 
2023 Joint European Conference on Networks and Communications & 6G Summit (EuCNC/6G Summit) 
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Event date: 
6-Jun-2023 - 9-Jun-2023
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Event place: 
Gothenburg, Sweden
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Number of Pages: 
6
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Publisher: 
IEEE
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Keywords: 
beam squint; misfocus; Reconfigurable intelligent surfaces; stationary phase method; ultra-wideband beamforming
en
Abstract: 
Misfocus or beam squint, is a fundamental prob-lem for reconfigurable intelligent surface (RIS)-assisted beam-forming. In this work, we investigate two methods for misfocus-reduction based on the stationary phase method (SPM) and the semi-definite relaxation (SDR), respectively. The proposed algorithms can provide a misfocus robust phase shift configuration. In the SPM-based algorithm, a closed-form expression is given, which reduces the computational complexity and has high efficiency when the RIS elements number is large. We use the circuit model to characterize the frequency selectivity of RIS elements. We investigate our methods under several critical factors: the number of RIS elements, the beamfoming bandwidth and the impact of the frequency selectivity of RIS itself.
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Research Areas: 
Telecommunication: 100%
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Science Branch: 
2020 - Elektrotechnik, Elektronik, Informationstechnik: 100%
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Appears in Collections:
Conference Paper

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