Paper Info
Title
Spatially Correlated Reconfigurable Intelligent Surfaces-Aided Cell-Free Massive MIMO Systems
Abstract
Reconfigurable intelligent surfaces (RISs) and cell-free (CF) massive multiple-input multiple-output (MIMO) are two promising technologies for realizing beyond-fifth generation (5G) networks. In this paper, we study the uplink spectral efficiency (SE) of a practical spatially correlated RISs-aided CF massive MIMO system over Rician fading channels. Specifically, we derive the closed-form expression for characterizing the uplink SE of the system, which shows that increasing the number of RIS elements can improve the system performance. Moreover, the results unveil that the spatial correlation of RIS has a significant impact on the system while leading to the best performance gain at a half wavelength spacing. Finally, the accuracy of our analytical results are verified by Monte-Carlo simulations.
Year
DOI
Venue
2022
10.1109/TVT.2022.3175459
IEEE Transactions on Vehicular Technology
Keywords
DocType
Volume
Reconfigurable intelligent surface,cell-free massive MIMO,spatial correlation,spectral efficiency
Journal
71
Issue
ISSN
Citations 
8
0018-9545
0
PageRank 
References 
Authors
0.34
19
7
Name
Order
Citations
PageRank
Enyu Shi100.34
Jiayi Zhang291174.44
Ruisi He352855.85
Huiying Jiao400.34
Zhiqin Wang563.48
Bo Ai61581185.94
Derrick Wing Kwan Ng73588189.08