Spectral Efficiency Analysis of Distributed-RIS-Empowered Multi-User mmWave Massive MIMO Systems

LI Guang-hui; LI Wen-hai; MA Pan-pan; LI Rui-feng; TANG Xi

doi:10.12263/DZXB.20250031

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Spectral Efficiency Analysis of Distributed-RIS-Empowered Multi-User mmWave Massive MIMO Systems

PAPERS | 更新时间：2025-12-10

- Spectral Efficiency Analysis of Distributed-RIS-Empowered Multi-User mmWave Massive MIMO Systems
- ACTA ELECTRONICA SINICA Vol. 53, Issue 7, Pages: 2500-2512(2025)
- 作者机构：
  
  海军航空大学，山东烟台264001
- 作者简介：
- 基金信息：
  
  Shandong Taishan Scholars Fund(TSTP20221146)
- DOI：10.12263/DZXB.20250031
  CLC： TN928
- Received：08 January 2025，
  
  Revised：2025-05-06，
  
  Published：25 July 2025
- 稿件说明：
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李光辉, 李文海, 马盼盼, 等. 分布式RIS赋能的多用户毫米波大规模MIMO系统频谱效率分析[J]. 电子学报, 2025, 53(07): 2500-2512.

LI Guang-hui, LI Wen-hai, MA Pan-pan, et al. Spectral Efficiency Analysis of Distributed-RIS-Empowered Multi-User mmWave Massive MIMO Systems[J]. Acta Electronica Sinica, 2025, 53(07): 2500-2512.
李光辉, 李文海, 马盼盼, 等. 分布式RIS赋能的多用户毫米波大规模MIMO系统频谱效率分析[J]. 电子学报, 2025, 53(07): 2500-2512. DOI：10.12263/DZXB.20250031

LI Guang-hui, LI Wen-hai, MA Pan-pan, et al. Spectral Efficiency Analysis of Distributed-RIS-Empowered Multi-User mmWave Massive MIMO Systems[J]. Acta Electronica Sinica, 2025, 53(07): 2500-2512. DOI：10.12263/DZXB.20250031

摘要

智能超表面（Reconfigurable Intelligent Surface，RIS）具有重构无线环境的能力，有望为未来通信网络提供新范式.然而，目前广泛研究的集中式RIS在服务多用户系统时具有覆盖能力差、复用增益低等诸多局限性.为此，本文提出了基于泊松点过程（Poisson Point Process，PPP）的分布式RIS部署架构，来增强多用户毫米波大规模多输入多输出（Multi-Input Multi-Output，MIMO）系统的通信性能.另外，本文根据毫米波信道最大增益路径的阵列响应设计了有源波束赋形与无源波束赋形，并在此基础上推导了遍历频谱效率的闭合表达式以便于分析功率缩放率，结果显示频谱效率与收发端天线数目、单个RIS上电磁元件数目的平方以及分布式RIS的部署密度成正比.仿真结果验证了理论分析的准确性，并表明RIS在性能提升方面优于其他有源器件.

Abstract

Reconfigurable intelligent surface (RIS) has the ability to reconstruct the wireless environment and is expected to provide a new paradigm for future communication networks. However

the widely studied centralized RIS has many limitations when served in multi-user systems

such as poor coverage ability and low multiplexing gain. To this end

we propose a distributed RIS deployment architecture based on Poisson point process (PPP) to enhance the communication performance of multi-user millimeter wave (mmWave) massive multi-input multi-output (MIMO) systems. Moreover

we design the active beamforming and passive beamforming based on the array responses of the maximum gain path in mmWave channels

and derive the closed-form expressions of the ergodic spectral efficiency to facilitate the analysis of the power scaling laws. The expressions show that the spectral efficiency is proportional to the number of transmitting/receiving antennas

the square of the number of elements on one RIS

and the density of distributed RISs. Simulation results verify the accuracy of the theoretical analyses

indicating that the RIS outperforms other active devices in terms of performance improvement.

关键词

Keywords

references

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