Computer Science > Information Theory
arXiv:2302.00074 (cs)
[Submitted on 31 Jan 2023]
Title:Randomized Control of Wireless Temporal Coherence via Reconfigurable Intelligent Surface
View a PDF of the paper titled Randomized Control of Wireless Temporal Coherence via Reconfigurable Intelligent Surface, by Jo\~ao Henrique Inacio de Souza and 4 other authors
View PDFAbstract:A reconfigurable intelligent surface (RIS) can shape the wireless propagation channel by inducing controlled phase shift variations to the impinging signals. Multiple works have considered the use of RIS by time-varying configurations of reflection coefficients. In this work we use the RIS to control the channel coherence time and introduce a generalized discrete-time-varying channel model for RIS-aided systems. We characterize the temporal variation of channel correlation by assuming that a configuration of RIS' elements changes at every time step. The analysis converges to a randomized framework to control the channel coherence time by setting the number of RIS' elements and their phase shifts. The main result is a framework for a flexible block-fading model, where the number of samples within a coherence block can be dynamically adapted.
| Comments: | 6 pages, 4 figures, conference paper |
| Subjects: | Information Theory (cs.IT); Signal Processing (eess.SP) |
| Cite as: | arXiv:2302.00074 [cs.IT] |
| (orarXiv:2302.00074v1 [cs.IT] for this version) | |
| https://doi.org/10.48550/arXiv.2302.00074 arXiv-issued DOI via DataCite |
Submission history
From: Joã Henrique Inacio De Souza [view email][v1] Tue, 31 Jan 2023 20:13:20 UTC (305 KB)
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View a PDF of the paper titled Randomized Control of Wireless Temporal Coherence via Reconfigurable Intelligent Surface, by Jo\~ao Henrique Inacio de Souza and 4 other authors
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