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

Werfli, Khald, Chvojka, Petr, Ghassemlooy, Zabih, Hassan, Navid, Zvanovec, Stanislav, Burton, Andrew, Haigh, Paul and Bhatnagar, Manav (2018) Experimental Demonstration of High-Speed 4 × 4 Imaging Multi-CAP MIMO Visible Light Communications. Journal of Lightwave Technology, 36 (10). pp. 1944-1951. ISSN 0733-8724

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Official URL: https://doi.org/10.1109/JLT.2018.2796503


In general, visible light communication (VLC) systems, which utilise white light-emitting diodes (LEDs), only offer a bandwidth limited to the lower MHz region. Therefore, providing VLC-based high data rate communications systems using VLC 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 × 4 imaging multiple-input multiple-output (MIMO) VLC system (i.e., space multiplexing) utilising multiband carrierless amplitude and phase (m-CAP) modulation (i.e., frequency multiplexing). Independently, both MIMO and m-CAP have separately shown the remarkable ability to improve the transmission speeds in VLC systems, and hence, here we combine them to further improve the net data rate. We investigate the link performance by varying the number of subcarriers m, link distance L, and signal bandwidth Bsig. From all the values tested, we show that a data rate of ~249 Mb/s can be maximally achieved for m = 20, Bsig = 20 MHz, and L = 1 m, at a bit error rate of 3.2 × 10-3 using LEDs with ~4 MHz bandwidth.

Item Type: Article
Uncontrolled Keywords: Modulation bandwidth, multi-band carrier-less amplitude and phase modulation, multiple-input multiple-output, visible light communications
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 21 May 2018 07:52
Last Modified: 01 Aug 2021 12:03
URI: http://nrl.northumbria.ac.uk/id/eprint/34280

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