Robust beamforming design for energy harvesting efficiency maximization in RIS-aided SWIPT system  

作　　者：Xingquan Li Hongxia Zheng Chunlong He Xiaowen Tian Xin Lin 

机构地区：[1]School of Microelectronics,Shenzhen Institute of Information Technology,Shenzhen,518000,China [2]School of Electronic and Communication Engineering,Shenzhen Polytechnic University,Shenzhen,518060,China [3]Guangdong Key Laboratory of Inteligent Information Processing,Shenzhen University,Shenzhen,518060,China [4]College of Physics and Electromechanical Engineering,Jishou University,Hunan,416000,China [5]Institute of Artificial Intelligence and Blockchain,Guangzhou University,Guangzhou,416000,China

出　　处：《Digital Communications and Networks》2024年第6期1804-1812,共9页数字通信与网络(英文版)

基　　金：supported by the Shenzhen Basic Research Program under Grant JCYJ20220531103008018,20231120142345001,20200812112423002;Shenzhen Stability Support Project under Grant 20231127144045001;the Double Height Construction under Grant SZIIT2022KJ023。

摘　　要：This paper investigates Energy Harvesting Efficiency(EHE)maximization problems for Reconfigurable Intelligent Surface(RIS)aided Simultaneous Wireless Information and Power Transfer(SWIPT).This system focuses on the imperfect RIS-related channel and explores the robust beamforming design to maximize the EHE of all energy receivers while respecting the maximum transmit power of the Access Point(AP),RIS phase shift constraints,and maintaining a minimum signal-to-interference plus noise ratio for all information receivers under both linear and non-linear EH models.To solve these non-convex problem,the channel uncertainty related infinite constraints are approximated by using the S-procedure.With the introduction of slack variables,the transformed subproblems can be iteratively solved using alternating algorithm.Simulation results demonstrate that RIS is able to increase the system EHE.

关 键 词：Energy Harvesting Efficiency(EHE) Reconfigurable Intelligent Surface(RIS) Simultaneous Wireless Information and Power Transfer(SWIPT) Imperfect Channel State Information(CSI) 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]