无线电工程2024，Vol.54Issue(7)：1660-1667,8.DOI:10.3969/j.issn.1003-3106.2024.07.008
透射反射双功能RIS辅助的SWIPT系统研究
Research on SWIPT System Assisted by Simultaneously Transmitting and Reflecting RIS
摘要
Abstract
A Simultaneously Transmitting and Reflecting Reconfigurable Intelligent Surface(STAR-RIS)assisted Simultaneous Wireless Information and Power Transfer(SWIPT)system is studied.Specifically,a STAR-RIS is deployed to assist in the information or power transfer from a multi-antenna Access Point(AP)to multiple single-antenna Information Decoding Receiver(IDR)and Energy Harvesting Receiver(EHR)respectively.The goal is to minimize the transmit power at the AP via jointly optimizing the transmission precoding matrices and the transmission-and reflection-coefficient matrices of the STAR-RIS under the communication rate constraints at IDRs and the energy harvesting constraints at EHRs.However,this optimization problem is non-convex with intricately coupled variables.To solve the problem,an alternating optimization algorithm is employed to decouple the coupled variables.Then,the transmission precoding matrices and the transmission-and reflection-coefficient matrices of the STAR-RIS can be optimized by using a semidefinite relaxation method and penalty-based algorithm respectively.The simulation results show that STAR-RIS system scheme can achieve better performance than conventional reflecting or transmitting-only RIS.关键词
透射反射双功能/可重构智能表面/无线携能通信/交替优化Key words
simultaneously transmitting and reflecting/RIS/SWIPT/alternating optimization分类
信息技术与安全科学引用本文复制引用
贾瑞霞,岳殿武,陈荥,李琦..透射反射双功能RIS辅助的SWIPT系统研究[J].无线电工程,2024,54(7):1660-1667,8.基金项目
国家自然科学基金(61971081)National Natural Science Foundation of China(61971081) （61971081）
