STAR-RIS辅助无线供能通信网络的优化
Optimization of STAR-RIS Assisted Wireless Powered Communication Network
余超 1李桂林 1张海洋 1李涣哲 1袁婷1
作者信息
- 1. 湖南理工学院 信息科学与工程学院,湖南 岳阳 414006
- 折叠
摘要
提出一种基于可同时透射和反射的可重构智能表面(STAR-RIS)辅助的无线供能通信网络,其中两个传感器节点组(SNG)利用供电站(PS)的无线能量信号采集能量,并利用所获取的能量将其信息发送至接入点(AP).STAR-RIS 部署在两个SNG的中间,为无线能量和信息传输提供帮助.通过联合优化STAR-RIS的相移参数和通信资源分配以实现系统吞吐量最大化.由于优化问题的非凸性,采用块坐标下降法对问题进行求解.通过引入辅助变量并利用连续凸逼近和罚函数等方法将原问题转化为凸问题进行求解.实验结果表明,提出的通信方案可以为系统提供更高的性能增益.
Abstract
In this paper,a wireless energy supply communication network assisted by reconfigurable intelligent surface with simultaneous transmission and reflection(STAR-RIS)is proposed,in which two sensor node groups(SNGs)utilize the wireless energy signals from the power supply station(PS)to harvest the energy and use the harvested energy to send their information to the access points(APs).STAR-RIS is deployed in the middle of two SNGs to provide assistance for wireless information transmission.The phase shift parameters and communication resource allocation of STAR-RIS are jointly optimized to maximize the system throughput.Due to the non-convexity of the optimization problem,block coordinate descent is used to solve the problem.By introducing auxiliary variables and using successive convex approximation and penalty function method,the original problem is transformed into a convex problem.The experimental results show that the proposed communication scheme can provide higher performance gain for the system.
关键词
STAR-RIS/无线供能通信网络/凸问题Key words
STAR-RIS/wireless powered communication network/convex problem引用本文复制引用
基金项目
湖南省自然科学基金青年项目(2021JJ40228)
湖南省研究生创新项目(QL20230275)
湖南省研究生创新项目(CX20231220)
湖南省大学生创新创业计划训练项目(S202310543040)
出版年
2024
NETL
NSTL
万方数据