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Wireless Networks
Erschienen in: Wireless Networks 7/2023

10.05.2023 | Original Paper

A novel channel estimation strategy for practical RIS-aided wideband OFDMA communications

verfasst von: Qian Liu, Wanning Yang, Ming Li, Rang Liu

Erschienen in: Wireless Networks | Ausgabe 7/2023

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Abstract

Channel state information acquisition is a crucial task for fully exploiting the appealing advantage of reconfigurable intelligent surface (RIS). In this paper, we develop a novel channel estimation strategy for practical RIS-assisted multiuser orthogonal frequency division multiplexing access (OFDMA) communication. Different from prior works which assume that the RIS has an ideal reflection model, in this work the channel estimation strategy is developed for a practical RIS reflection model by considering the amplitude-phase-frequency response of the reflected signals for wideband systems. To improve the accuracy and efficiency of the channel estimation, we propose a novel channel estimation method with pilot subcarrier allocation and RIS time-varying reflection pattern design. Simulation results demonstrate the superiority of our proposed channel estimation strategy.
Vorheriger Artikel Multivariate clustering for maximizing the small cell users’ performance based on the dynamic interference alignment
Nächster Artikel Design of rectangular microstrip patch antenna using hybrid group teaching optimization algorithm and volcano Eruption algorithm

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Metadaten
Titel
A novel channel estimation strategy for practical RIS-aided wideband OFDMA communications
verfasst von
Qian Liu
Wanning Yang
Ming Li
Rang Liu
Publikationsdatum
10.05.2023
Verlag
Springer US
Erschienen in
Wireless Networks / Ausgabe 7/2023
Print ISSN: 1022-0038
Elektronische ISSN: 1572-8196
DOI
https://doi.org/10.1007/s11276-023-03355-z

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