MIMO Capacity Maximization With a Practical Model for Reconfigurable Intelligent Surfaces

Ahmad Sirojuddin, Titiek Suryani*, Suwadi, Wirawan, Mohamed Slim Alouini

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Reconfigurable intelligent surface (RIS) is a cutting-edge technology projected to significantly enhance the spectrum and energy efficiency of current wireless communication systems. This letter addresses the problem of maximizing the capacity of practically modeled RIS-assisted single-point MIMO systems in which the reflective elements have inherent resistance. The solutions for the optimal power allocation and RIS phase shifts are obtained using the Newton-Raphson method and a modified gradient ascent algorithm, respectively. The numerical results show that the proposed method surpasses three benchmark systems in terms of the optimality of the achieved rate and the execution time.

Original languageEnglish
Pages (from-to)3330-3334
Number of pages5
JournalIEEE Wireless Communications Letters
Volume13
Issue number12
DOIs
Publication statusPublished - 2024

Keywords

  • Capacity maximization
  • MIMO
  • information and communication technology
  • practical model RIS
  • reconfigurable intelligent surface

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