Spatially Correlated Reconfigurable Intelligent Surfaces-Aided Cell-Free Massive MIMO Systems

被引：20
|
作者：
Shi, Enyu [1 ,2 ]
Zhang, Jiayi [1 ,2 ]
He, Ruisi [3 ]
Jiao, Huiying [4 ]
Wang, Zhiqin [4 ]
Ai, Bo [2 ,3 ,5 ,6 ]
Ng, Derrick Wing Kwan [7 ]
机构：
[1] Beijing Jiaotong Univ, Sch Elect & Informat Engn, Beijing 100044, Peoples R China
[2] Beijing Jiaotong Univ, Frontiers Sci Ctr Smart High Speed Railway Syst, Beijing 100044, Peoples R China
[3] Beijing Jiaotong Univ, State Key Lab Rail Traff Control & Safety, Beijing 100044, Peoples R China
[4] China Acad Informat & Commun Technol, Beijing 100191, Peoples R China
[5] Zhengzhou Univ, Henan Joint Int Res Lab Intelligent Networking &, Zhengzhou 450001, Peoples R China
[6] Peng Cheng Lab, Res Ctr Networks & Commun, Shenzhen 518000, Peoples R China
[7] Univ New South Wales, Sch Elect Engn & Telecommun, Kensington, NSW 2033, Australia
来源：
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2022年 / 71卷 / 08期
基金：
澳大利亚研究理事会; 中国国家自然科学基金; 北京市自然科学基金; 国家重点研发计划;
关键词：
Channel estimation; Correlation; Uplink; Massive MIMO; Time-varying systems; Time-domain analysis; Switches; Reconfigurable intelligent surface; cell-free massive MIMO; spatial correlation; spectral efficiency; PERFORMANCE;
D O I：
10.1109/TVT.2022.3175459
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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.
引用
收藏
页码：9073 / 9077
页数：5
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