Reference : Energy Efficiency Maximization in RIS-Aided Cell-Free Network with Limited Backhaul
Scientific journals : Article
Engineering, computing & technology : Electrical & electronics engineering
Security, Reliability and Trust
http://hdl.handle.net/10993/46654
Energy Efficiency Maximization in RIS-Aided Cell-Free Network with Limited Backhaul
English
Le, Nhat Le []
Nguyen, van Dinh mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom >]
Dobre, Octavia A. []
Zhao, Ruiqin []
24-Feb-2021
IEEE Communications Letters
Institute of Electrical and Electronics Engineers
25
6
1974 - 1978
Yes
International
1089-7798
New York
NY
[en] Cell-free network ; energy efficiency ; reconfigurable intelligent surface
[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.
Interdisciplinary Centre for Security, Reliability and Trust (SnT) > SIGCOM
Researchers ; Professionals ; Students ; General public
http://hdl.handle.net/10993/46654
10.1109/LCOMM.2021.3062275
https://ieeexplore.ieee.org/document/9363171

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