Phase Shift Design for RIS-Aided Cell-Free Massive MIMO with Improved Differential Evolution

Autor:	Van Chien, Trinh, Le, Cuong V., Binh, Huynh Thi Thanh, Ngo, Hien Quoc, Chatzinotas, Symeon
Rok vydání:	2023
Předmět:	Computer Science - Information Theory Electrical Engineering and Systems Science - Signal Processing
Druh dokumentu:	Working Paper
Popis:	This paper proposes a novel phase shift design for cell-free massive multiple-input and multiple-output (MIMO) systems assisted by reconfigurable intelligent surface (RIS), which only utilizes channel statistics to achieve the uplink sum ergodic throughput maximization under spatial channel correlations. Due to the non-convexity and the scale of the derived optimization problem, we develop an improved version of the differential evolution (DE) algorithm. The proposed scheme is capable of providing high-quality solutions within reasonable computing time. Numerical results demonstrate superior improvements of the proposed phase shift designs over the other benchmarks, particularly in scenarios where direct links are highly probable. Comment: 5 pages, 2 figures. Accepted by IEEE WCL
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2308.06539 Zobrazit plný text záznamu View this record from Arxiv