Reconfigurable Intelligent Surface Assisted Over-the-Air Computation in Multi-Cell Networks

doi:10.1109/MeditCom55741.2022.9928626

	Reconfigurable Intelligent Surface Assisted Over-the-Air Computation in Multi-Cell Networks
	Li, Jun; Wu, Youlong; Shi, Yuanming
	2022-09-08
会议录名称	2022 IEEE INTERNATIONAL MEDITERRANEAN CONFERENCE ON COMMUNICATIONS AND NETWORKING (MEDITCOM)
发表状态	已发表
DOI	10.1109/MeditCom55741.2022.9928626
摘要	Over-the-air computation (AirComp) becomes a promising technology for fast wireless data aggregation which supports the requirement of ultra-fast wireless data transmission. However, current works mainly focus on the single-cell systems, ignoring the inter-cell interference caused by multiple-cell task coexisting. To unleash the potential of AirComp in multi-cell networks, in this paper we consider the reconfigurable intelligent surface (RIS) to overcome the unfavorable signal condition by adjusting the phase shift at the RIS. Our goal is to minimize the mean-square error for AirComp by jointly optimizing the receive beamforming vectors at the base station and the phase-shift ma-trix at the RIS. However, due to the highly coupled optimization variables, the resulting problem is non-convex and challenging. We thus present an alternating optimization framework to decompose the problem into several quadratic sum-of-ratios problems (QSRP) with nonconvex quadratic constraints. Then, we apply successive convex approximation method to transform each QSRP into several convex sub-problems. Simulation results demonstrate the convergence of proposed algorithm and validate the ability of an RIS in enlarging the channel-gain difference under multiple-cell network systems.
关键词	Wireless communication Simulation Transforms Mean square error methods Reconfigurable intelligent surfaces Minimization Intercell interference
会议地点	Athens, Greece
会议日期	5-8 Sept. 2022
URL	查看原文
收录类别	EI
来源库	IEEE
文献类型	会议论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/251426
专题	信息科学与技术学院_硕士生信息科学与技术学院_PI研究组_吴幼龙组信息科学与技术学院_PI研究组_石远明组
作者单位	ShanghaiTech University, School of Information Science and Technology, Shanghai; 201210, China
第一作者单位	信息科学与技术学院
第一作者的第一单位	信息科学与技术学院
推荐引用方式 GB/T 7714	Li, Jun,Wu, Youlong,Shi, Yuanming. Reconfigurable Intelligent Surface Assisted Over-the-Air Computation in Multi-Cell Networks[C],2022.