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Lookup NU author(s): Dr Paul HaighORCiD
This is the authors' accepted manuscript of an article that has been published in its final definitive form by IEEE, 2018.
For re-use rights please refer to the publisher's terms and conditions.
IEEE In general, visible light communication (VLC) systems, which utilise white light-emitting diodes (LEDs), only offer a bandwidth limited to the low MHz region. Therefore, providing VLC-based high data rate communications systems becomes a challenging task. To address this challenge, we propose a solution based on multiplexing in both the frequency and space domains. We experimentally demonstrate a 4 $\times$ 4 imaging multiple-input multiple-output (MIMO) VLC system (i.e., space multiplexing) utilising multi-band carrier-less amplitude and phase (m-CAP) modulation (i.e., frequency multiplexing). Independently, both MIMO and m-CAP have shown the remarkable ability to improve transmission speeds in VLC systems, and hence, here we combine them to further improve the net data rate. We investigate link performance by varying the number of subcarriers m, link distance L, and signal bandwidth B$_{sig}$. From all the values tested, we show a data rate of ~249 Mb/s can be maximally achieved for m = 20, B$_{sig}$ = 20 MHz, and L = 1 m, at a bit error rate of 3.2$\times$10$_{-3}$ using LEDs with ~4 MHz bandwidth.
Author(s): Werfli K, Chvojka P, Ghassemlooy Z, Bani Hassan N, Zvanovec S, Burton A, Haigh PA, Bhatnagar M
Publication type: Article
Publication status: Published
Journal: Journal of Lightwave Technology
Year: 2018
Volume: 36
Issue: 10
Pages: 1944-1951
Print publication date: 15/05/2018
Online publication date: 23/01/2018
Acceptance date: 02/04/2016
Date deposited: 12/03/2019
ISSN (print): 0733-8724
ISSN (electronic): 1558-2213
Publisher: IEEE
URL: https://doi.org/10.1109/JLT.2018.2796503
DOI: 10.1109/JLT.2018.2796503
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