物联网学报2026，Vol.10Issue(2)：42-52,11.DOI:10.11959/j.issn.2096-3750.WLW25095
基于RIS的无蜂窝大规模MIMO联合预编码与功控研究
Joint precoding and power control for cell-free massive MIMO systems assisted by RIS
摘要
Abstract
Cell-free massive multiple-input multiple-output(CF-mMIMO)systems,which eliminate inter-cell interfer-ence and enhance spectral efficiency,are considered as a key enabling technology for 6th generation mobile communica-tions(6G).Meanwhile,reconfigurable intelligent surface(RIS),featuring low power consumption,programmability,and flexible deployment,offers significant potential for improving channel quality and extending coverage.In this paper,a RIS-assisted CF-mMIMO system was investigated,and a joint optimization problem involving power control,precoding,and RIS phase adjustment was formulated to maximize energy efficiency(EE).To tackle this non-convex multi-variable problem,an alternating optimization framework was proposed.Specifically,the precoding and RIS phase subproblems were decoupled and solved using the Lagrangian dual transform and fractional programming,while the power control subprob-lem was addressed via Newton method.Simulation results demonstrate that the proposed scheme achieves faster convergence and significantly outperforms the conventional uniform power allocation methods.Moreover,it simultaneously improves both energy efficiency and communication rate,effectively enabling the joint optimization of spectrum efficiency(SE)and EE.关键词
无蜂窝大规模多输入多输出/可重构智能表面/功率控制优化/能量效率Key words
CF-mMIMO/RIS/power control optimization/EE分类
信息技术与安全科学引用本文复制引用
徐畅畅,张琦,赵洁,张军..基于RIS的无蜂窝大规模MIMO联合预编码与功控研究[J].物联网学报,2026,10(2):42-52,11.基金项目
国家自然科学基金资助项目(No.62171231,No.62571267) （No.62171231,No.62571267）
江苏省重点研发计划(产业前瞻与关键核心技术)项目(No.BE2023022-3) The National Natural Science Foundation of China(No.62171231,No.62571267),the Key Technologies Re-search&Development Program of Jiangsu(Prospective and Key Technologies for Industry)(No.BE2023022-3) （产业前瞻与关键核心技术）
