Distributed IRS-Aided DF Relaying Systems:Performance Analysis and Optimization  

作　　者：Sun Qiang Qian Panpan Chen Xiaomin Ju Jinjuan Wang Jue Zhang Jiayi 

机构地区：[1]School of Information Science and Technology,Nantong University,Nantong 226019,China [2]Nantong Research Institute for Advanced Communication Technologies,Nantong 226019,China [3]School of Electronic and Information Engineering,Nantong Vocational University,Nantong 226007,China [4]School of Electronic and Information Engineering,Beijing Jiaotong University,Beijing 100044,China

出　　处：《China Communications》2024年第6期129-145,共17页中国通信（英文版）

基　　金：supported in part by National Natural Science Foundation of China under Grant 62371262 and 61971467;in part by the Key Research and Development Program of Jiangsu Province of China under Grant BE2021013-1;in part by the Qinlan Project of Jiangsu Province;in part by the Scientific Research Program of Nantong under Grant JC22022026

摘　　要：Intelligent reflecting surface(IRS)is a newly emerged and promising paradigm to substantially improve the performance of wireless communications by constructing favorable communication channels via properly tuning massive reflecting elements.This paper considers a distributed IRS aided decode-and-forward(DF)relaying system over Nakagami-m fading channels.Based on a tight approximation for the distribution of the received signalto-noise ratio(SNR),we first derive exact closed-form expressions of the outage probability,ergodic capacity,and energy efficiency for the considered system.Moreover,we propose the optimal IRS configuration considering the energy efficiency and pilot overhead.Finally,we compare the performance between the distributed IRS-aided DF relaying and multi-IRS-only systems,and verify the analytical results by using monte carlo simulations.

关 键 词：CONFIGURATION energy efficiency ergodic capacity intelligent reflecting surface IRS outage probability 

分 类 号：TN92[电子电信—通信与信息系统]