Abstract

Discrete multi-tone (DMT) modulation is known to be an efficient single-transmitter technique for visible-light communication. However, the use of this technique in a multiple transmitter environment requires effective subcarrier and power allocation design in order to exploit the full potential of spatial multiple-transmitter diversity. Spatial reuse of the subcarriers in the presence of interference and power constraints increases the efficiency of multiple access (MA) DMT communication. In this paper, we propose an algorithm that manages interference-constrained subcarrier reuse between different transmitters and power redistribution between different subcarriers in a heuristic manner. The algorithm simulation shows an improvement in the average bit-rate as compared with a conventional DMT method. Furthermore, the effectiveness of the proposed MA-DMT scheme increases with the number of users.

© 2014 IEEE

Adaptive WHTS-Assisted SDMA-OFDM Scheme for Fair Resource Allocation in Multi-User Visible Light Communications

Oswaldo González, Marcos F. Guerra-Medina, Inocencio R. Martín, Francisco Delgado, and Rafael Pérez-Jiménez
J. Opt. Commun. Netw. 8(6) 427-440 (2016)

Efficient signal design and optimal power allocation for visible light communication attocell systems

Zheng-Guo Sun, Hongyi Yu, and Yi-Jun Zhu
Appl. Opt. 56(32) 8959-8968 (2017)

Hybrid multi-user access scheme for a visible light communication system

Kai Fan, Jianping Wang, Danyang Chen, and Huimin Lu
Appl. Opt. 61(26) 7552-7557 (2022)

Smart LED allocation scheme for efficient multiuser visible light communication networks

Atul Sewaiwar, Samrat Vikramaditya Tiwari, and Yeon Ho Chung
Opt. Express 23(10) 13015-13024 (2015)

Resource allocation algorithm of an indoor OFDMA VLC system

Huili Shi, Ping Wang, Ting Yang, Hui Che, Yang Zhang, and Peiyu Li
Appl. Opt. 61(18) 5368-5374 (2022)