Power Minimization for the IRS-Aided SWIPT Secure Communication System with Imperfect Cascaded Channel  

作　　者：Chunlong He Shuqiong Xu Gongbin Qian Xingquan Li Chiya Zhang 

机构地区：[1]Guangdong Key Laboratory of Intelligent Information Processing,Shenzhen University,Shenzhen 518060,China [2]School of Microelectronics,Shenzhen Institute of Information Technology,Shenzhen 518000,China [3]School of Electronic and Information Engineering,Harbin Institute of Technology,Shenzhen 518055,China [4]National Mobile Communications Research Laboratory,Southeast University,Nanjing 210096,China [5]Peng Cheng Laboratory(PCL),Shenzhen 5180523,China

出　　处：《Journal of Communications and Information Networks》2023年第2期133-140,共8页通信与信息网络学报（英文）

基　　金：National Natural Science Foundation of China(62101161);Shenzhen Basic Research Program(20200812112423002);Shenzhen Basic Research Program(JCYJ20220531103008018);open research fund of National Mobile Communications Research Laboratory,Southeast University(2022D02)。

摘　　要：Intelligent reflecting surface(IRS)-assisted simultaneous wireless information and power transfer(SWIPT)is a promising technology for prolonging the lifetime of the users and improving system performance.However,it is challenging to obtain the perfect channel state information(CSI)at the base station(BS)due to the lack of radio frequency(RF)chains at the IRS,which becomes even harder when eavesdroppers(Eves)exist.In this paper,we study the power issues in the IRS-aided SWIPT system under the imperfect CSI of BS-IRS-Eves links.We aim to minimize the transmitting power at the BS by jointly designing transmit beamforming and reflective beamforming with subject to the rate outage probability constraints of the Eves,the energy harvesting constraints of the energy receivers(ERs),and the minimum rate constraints of the information receivers(IRs).We use Bernstein-type inequality to solve the rate outage probability constraints.Afterward,the formulated nonconvex problem can be efficiently tackled by employing alternating optimization(AO)combined with semidefinite relaxation(SDR)and penalty convex-concave procedure(CCP).Numerical results demonstrate the effectiveness of the proposed scheme.

关 键 词：IRS SWIPT secure communication AO 

分 类 号：TN929.5[电子电信—通信与信息系统]