Spectral and Energy Efficiency of DCO-OFDM in Visible Light Communication Systems With Finite-Alphabet Inputs

被引：14

作者：

Yang, Ruixin ^{[1
]}

Ma, Shuai ^{[1
,2
,3
]}

Xu, Zihan ^{[4
]}

Li, Hang ^{[5
]}

Liu, Xiaodong ^{[6
]}

Ling, Xintong ^{[2
,7
]}

Deng, Xiong ^{[8
]}

Zhang, Xun ^{[9
]}

Li, Shiyin ^{[1
]}

机构：

[1] China Univ Min & Technol, Sch Informat & Control Engn, Xuzhou 221116, Jiangsu, Peoples R China

[2] Southeast Univ, Natl Mobile Commun Res Lab, Nanjing 210096, Peoples R China

[3] Xian Univ Posts & Telecommun, Shaanxi Key Lab Informat Commun Network & Secur, Xian 710121, Peoples R China

[4] Spreadtrum Commun Shanghai Co Ltd, Shanghai 201203, Peoples R China

[5] Shenzhen Res Inst Big Data, Shenzhen 518172, Guangdong, Peoples R China

[6] Nanchang Univ, Sch Informat Engn, Nanchang 330031, Jiangxi, Peoples R China

[7] Purple Mt Labs, Nanjing 210023, Peoples R China

[8] Southwest Jiaotong Univ, Ctr Informat Photon & Commun, Chengdu 610031, Peoples R China

[9] Inst Super Elect Paris ISEP Paris, F-75006 Paris, France

来源：

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2022年 / 21卷 / 08期

基金：

中国国家自然科学基金; 欧盟地平线“2020”;

关键词：

Resource management; OFDM; Adaptive optics; Visible light communication; Mutual information; Time-domain analysis; Radio frequency; Visible light communications; DCO-OFDM; finite-alphabet input; spectral efficiency; energy efficiency; BIASED OPTICAL OFDM; INFORMATION; NETWORKS; CHANNELS; INTERNET; SCHEMES; DESIGN; THINGS;

D O I：

10.1109/TWC.2022.3145288

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The bound of the information transmission rate of direct current biased optical orthogonal frequency division multiplexing (DCO-OFDM) for visible light communication (VLC) with finite-alphabet inputs is yet unknown, where the corresponding spectral efficiency (SE) and energy efficiency (EE) stems out as the open research problems. In this paper, we derive the exact achievable rate of the DCO-OFDM system with finite-alphabet inputs for the first time. Furthermore, we investigate SE maximization problems of the DCO-OFDM system subject to both electrical and optical power constraints. By exploiting the relationship between the mutual information and the minimum mean-squared error, we propose a multi-level mercury-water-filling power allocation scheme to achieve the maximum SE. Moreover, the EE maximization problems of the DCO-OFDM system are studied, and the Dinkelbach-type power allocation scheme is developed for the maximum EE. Numerical results verify the effectiveness of the proposed theories and power allocation schemes.

引用

页码：6018 / 6032

页数：15

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