Channel Capacity and Power Allocation of MIMO Visible Light Communication System

作     者：Shuai Ma Ruixin Yang Guanjie Zhang Hang Li Wen Cao Linqiong Jia Yanyu Zhang Shiyin Li Shuai Ma;Ruixin Yang;Guanjie Zhang;Hang Li;Wen Cao;Linqiong Jia;Yanyu Zhang;Shiyin Li

作者机构：Peng Cheng LaboratoryShenzhen 518055China School of Information and Control EngineeringChina University of Mining and TechnologyXuzhou 221116China Shenzhen Research Institute of Big DataShenzhen 518172China School of Electronics and Control EngineeringChang’an UniversityXi’an 710064China School of Electronic and Optical EngineeringNanjing University of Science and TechnologyNanjing 210094China National Digital Switching System Engineering&Technological Research CenterZhengzhou 450000China 

出 版 物：《China Communications》 (中国通信（英文版）)

年 卷 期：2023年第20卷第2期

页      面：122-138页

核心收录：

学科分类：0810[工学-信息与通信工程] 08[工学] 0803[工学-光学工程] 

基　　金：supported by the Graduate Innovation Program of China University of Mining and Technology (2022WLKXJ016) in part by the Postgraduate Research&Practice Innovation Program of Jiangsu Province (KYCX222549) supported by Shaanxi Provincial Natural Science Foundation of China (2023-JC-YB-510) the Fundamental Research Funds for the Central Universities,CHD (300102322103) supported in part by Natural Science Foundation of Jiangsu Province (BK20200488) supported in part by Challenge Cup National Student Curricular Academic Science and Technology Works Competition (DCXM202212) 

主　　题：visible light communication MIMO discrete constellation inputs power allocation 

摘      要：In this paper,the channel capacity of the multiple-input multiple-output(MIMO)visible light communication(VLC)system is investigated under the peak,average optical and electrical power *** the channel capacity of MIMO VLC is shown to be a mixed integer programming *** address this open problem,we propose an inexact gradient projection method to find the channel capacity-achieving discrete input distribution and the channel capacity of MIMO *** we derive both upper and lower bounds of the capacity of MIMO VLC with the closed-form ***,by considering practical discrete constellation inputs,we develop the optimal power allocation scheme to maximize transmission rate of MIMO VLC *** results show that more discrete points are needed to achieve the channel capacity as SNR *** the upper and lower bounds of channel capacity are tight at low SNR *** addition,comparing the equal power allocation,the proposed power allocation scheme can significantly increase the rate for the low-order modulation inputs.