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Average Rate Approximation and Maximization for RIS-Assisted Multi-User MISO System | IEEE Journals & Magazine | IEEE Xplore

Average Rate Approximation and Maximization for RIS-Assisted Multi-User MISO System


Abstract:

In this letter, we investigate a reconfigurable intelligent surface (RIS) assisted downlink multi-user multiple-input single-output (MISO) system. We derive the approxima...Show More

Abstract:

In this letter, we investigate a reconfigurable intelligent surface (RIS) assisted downlink multi-user multiple-input single-output (MISO) system. We derive the approximations of average rate of user equipments (UEs) under proper assumptions, and reveal the relations between average rates and system parameters. Furthermore, a RIS configuration algorithm is proposed to improve the average sum rate with low complexity by exploiting the approximation of average rate and statistical channel state information (CSI). The rationality of the assumptions, the tightness of the approximations and the effectiveness of the proposed algorithm are validated by numerical results.
Published in: IEEE Wireless Communications Letters ( Volume: 11, Issue: 1, January 2022)
Page(s): 173 - 177
Date of Publication: 27 October 2021

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