Article (Scientific journals)
Energy Efficiency Maximization in RIS-Aided Cell-Free Network with Limited Backhaul
Le, Nhat Le; Nguyen, van Dinh; Dobre, Octavia A. et al.
2021In IEEE Communications Letters, 25 (6), p. 1974 - 1978
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Keywords :
Cell-free network; energy efficiency; reconfigurable intelligent surface
Abstract :
[en] Integrating the reconfigurable intelligent surface in a cell-free (RIS-CF) network is an effective solution to improve the capacity and coverage of future wireless systems with low cost and power consumption. The reflecting coefficients of RISs can be programmed to enhance signals received at users. This letter addresses a joint design of transmit beamformers at access points and reflecting coefficients at RISs to maximize the energy efficiency (EE) of RIS-CF networks, taking into account the limited backhaul capacity constraints. Due to a very computationally challenging nonconvex problem, we develop a simple yet efficient alternating descent algorithm for its solution. Numerical results verify that the EE of RIS-CF networks is greatly improved, showing the benefit of using RISs.
Research center :
Interdisciplinary Centre for Security, Reliability and Trust (SnT) > SIGCOM
Disciplines :
Electrical & electronics engineering
Author, co-author :
Le, Nhat Le
Nguyen, van Dinh ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
Dobre, Octavia A.
Zhao, Ruiqin
External co-authors :
yes
Language :
English
Title :
Energy Efficiency Maximization in RIS-Aided Cell-Free Network with Limited Backhaul
Publication date :
24 February 2021
Journal title :
IEEE Communications Letters
ISSN :
1089-7798
Publisher :
Institute of Electrical and Electronics Engineers, New York, United States - New York
Volume :
25
Issue :
6
Pages :
1974 - 1978
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Security, Reliability and Trust
Available on ORBilu :
since 22 March 2021

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