Ergodic Capacity Analysis of Reconfigurable Intelligent Surface Assisted MIMO Systems Over Rayleigh-Rician Channels

被引：10
作者：
Mosleh, Marjan Abbasi [1 ]
Heliot, Fabien [1 ]
Tafazolli, Rahim [1 ]
机构：
[1] Univ Surrey, Inst Commun Syst ICS, Dept Elect & Elect Engn 5GIC & 6GIC, Guildford GU2 7XH, England
来源：
IEEE COMMUNICATIONS LETTERS | 2023年 / 27卷 / 01期
关键词：
Eigenvalues and eigenfunctions; Rician channels; Receivers; Transmitters; Signal to noise ratio; Probability density function; Wireless communication; Reconfigurable intelligent surface; MIMO; ergodic capacity; COMMUNICATION;
D O I：
10.1109/LCOMM.2022.3221158
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
Metamaterial-based antenna designs, such as Reconfigurable Intelligent Surface (RIS), are expected to play a significant role in next generation communication networks (i.e. 6G) because of their ability to improve wireless communication environments. This letter investigates the ergodic capacity of RIS-aided multiple input multiple output (MIMO), a.k.a. MIMO-RIS, systems over Rayleigh-Rician fading channels. We consider that the transmitter-RIS and receiver-RIS links experience Rayleigh and Rician fading, respectively. An exact analytical expression of the ergodic capacity is derived based on closed-form expressions of the probability density function (pdf) of the cascaded channel. Moreover, a high SNR expression and a large RIS approximation are provided to unveil further system insights. Simulations result validate the correctness of our expressions and show the impact of the Rician fading and the number of RIS elements on the capacity.
引用
收藏
页码：75 / 79
页数：5
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