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Experimental Demonstration of High-Speed 4 x 4 Imaging Multi-CAP MIMO Visible Light Communications

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.

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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.

Publication metadata

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


DOI: 10.1109/JLT.2018.2796503


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