An Efficient Learning Algorithm for Phase Shift Optimization in RIS-Aided MISO Wireless Systems

Jiawen Tian, Wenwen Guan, Xiao Li, Theodoros A. Tsiftsis, Hongwu Liu

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

Abstract

Due to dynamic change of the wireless environment, devising the local phase shift matrix for reconfigurable intelligent surface (RIS) can be a thought-provoking task. Therefore, in this paper, we come up with a deep reinforcement learning (DRL)-based beamforming optimization algorithm for RIS-aided multiple-input single-output communication systems. To be precise, we exploit a DRL-based structure based on twin-delayed-deep-deterministic-policy-gradient (TD3) algorithm to automatically adjust the phase shift of each unit at RIS to maximize the downlink received signal-to-noise ratio (SNR). Simulation results show that the raised TD3 algorithm performs a higher received SNR than the conventional DRL algorithm with a reduced running time.

Original languageEnglish
Title of host publication2023 IEEE 15th International Conference on Wireless Communications and Signal Processing, WCSP 2023
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1014-1019
Number of pages6
ISBN (Electronic)9798350324662
DOIs
Publication statusPublished - 2023
Externally publishedYes
Event15th IEEE International Conference on Wireless Communications and Signal Processing, WCSP 2023 - Hangzhou, China
Duration: 2 Nov 20234 Nov 2023

Publication series

Name2023 IEEE 15th International Conference on Wireless Communications and Signal Processing, WCSP 2023

Conference

Conference15th IEEE International Conference on Wireless Communications and Signal Processing, WCSP 2023
Country/TerritoryChina
CityHangzhou
Period2/11/234/11/23

Keywords

  • Deep reinforcement learning (DRL)
  • passive phase shift design
  • reconfigurable intelligent surface (RIS)
  • TD3 algorithm

ASJC Scopus subject areas

  • Media Technology
  • Artificial Intelligence
  • Computer Networks and Communications
  • Computer Vision and Pattern Recognition
  • Signal Processing

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