Error Propagation and Overhead Reduced Channel Estimation for RIS-Aided Multi-User mmWave Systems

Peng Z, Pan C, Zhou G, Ren H (2022)

Publication Type: Conference contribution

Publication year: 2022

Publisher: VDE Verlag GmbH

Book Volume: 2022-October

Conference Proceedings Title: Proceedings of the International Symposium on Wireless Communication Systems

Event location: Hangzhou CN

ISBN: 9781665455442

DOI: 10.1109/ISWCS56560.2022.9940350

Abstract

In this paper, we propose a novel two-stage based uplink channel estimation strategy with reduced pilot overhead and error propagation for a reconfigurable intelligent surface (RIS)-aided multi-user (MU) millimeter wave (mmWave) system. Specifically, in Stage I, with the carefully designed RIS phase shift matrix and introduced matching matrices, all users jointly transmit the pilot signals for the estimation of the correlation factors between different paths of the common RIS-base station (BS) channel, which achieves significant multi-user diversity gain. Then, the inherent scaling ambiguity and angle ambiguity of the mmWave cascaded channel are utilized to construct an ambiguous common RIS-BS channel composed of the estimated correlation factors. In Stage II, with the constructed ambiguous common RIS-BS channel, each user independently sends reduced pilots for estimating their specific user-RIS channel so as to obtain the entire cascaded channel. The theoretical number of pilots required for the proposed method is analyzed and the simulation results are presented to validate the effectiveness of this strategy.

Authors with CRIS profile

Gui Zhou Lehrstuhl für Digitale Übertragung

Involved external institutions

University of Electronic Science and Technology of China (UESTC) / 电子科技大学 CN China (CN) Southeast University / 东南大学 CN China (CN)

How to cite

APA:

Peng, Z., Pan, C., Zhou, G., & Ren, H. (2022). Error Propagation and Overhead Reduced Channel Estimation for RIS-Aided Multi-User mmWave Systems. In Proceedings of the International Symposium on Wireless Communication Systems. Hangzhou, CN: VDE Verlag GmbH.

MLA:

Peng, Zhendong, et al. "Error Propagation and Overhead Reduced Channel Estimation for RIS-Aided Multi-User mmWave Systems." Proceedings of the 2022 International Symposium on Wireless Communication Systems, ISWCS 2022, Hangzhou VDE Verlag GmbH, 2022.

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