物联网学报2025，Vol.9Issue(4)：40-50,11.DOI:10.11959/j.issn.2096-3750.2025.00478
RIS辅助的去蜂窝网络前传压缩与混合预编码设计
Fronthaul compression and hybrid precoding design for RIS-aided cell-free networks
摘要
Abstract
To improve the performance of cell-free(CF)networks,the hybrid precoding design was studied for reconfigu-rable intelligent surface(RIS)-aided CF networks,of which the capacity of the fronthaul link between the access points and central processing unit was limited.A weighted sum rate maximization problem was formulated by jointly optimizing the hybrid precoding matrices,RIS phase shift coefficients,and quantization noise covariance matrices while satisfying the users' quality of service(QoS)constraints and fronthaul link capacity constraints.By applying the alternating optimi-zation method,the optimization problem was divided into four sub-problems and solved in an iterative manner.To ad-dress the non-convex QoS constraints,the quadratic transform was adopted to approximate the constraints.For the non-convex constant-modulus constraints,a manifold optimization method was proposed under the alternating direction method of multipliers framework.The simulation results show that the proposed algorithm significantly outperforms the baseline algorithms and the deployment of RIS can effectively enhance the rate of the users.关键词
去蜂窝网络/可重构智能表面/混合预编码/量化压缩Key words
CF network/RIS/hybrid precoding/quantization and compression分类
信息技术与安全科学引用本文复制引用
张广阳,甄若亦,李宇航,陆杨,丁建文,钟章队..RIS辅助的去蜂窝网络前传压缩与混合预编码设计[J].物联网学报,2025,9(4):40-50,11.基金项目
国家自然科学基金资助项目(No.62171021) （No.62171021）
中国国家铁路集团有限公司科技研究开发计划项目(No.L2023G005) （No.L2023G005）
中国神华能源股份有限公司科技创新项目(No.SHGF-24-4)The National Natural Science Foundation of China(No.62171021),The Science and Technology Project of China State Railway Group(No.L2023G005),The Science and Technology Innovation Project of China Shenhua Energy Co.,LTD(No.SHGF-24-4) （No.SHGF-24-4）
