Werfli, K;
Chvojka, P;
Ghassemlooy, Z;
Bani Hassan, N;
Zvanovec, S;
Burton, A;
Haigh, PA;
(2018)
Experimental Demonstration of High-Speed 4 × 4 Imaging Multi-CAP MIMO Visible Light Communications.
Journal of Lightwave Technology
, 36
(10)
pp. 1944-1951.
10.1109/JLT.2018.2796503.
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Abstract
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 < formula > < tex > $\times$ < /tex > < /formula > 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 < formula > < tex > $_{sig}$ < /tex > < /formula > . From all the values tested, we show a data rate of ~249 Mb/s can be maximally achieved for m = 20, B < formula > < tex > $_{sig}$ < /tex > < /formula > = 20 MHz, and L = 1 m, at a bit error rate of 3.2 < formula > < tex > $\times$ < /tex > < /formula > 10 < formula > < tex > $_{-3}$ < /tex > < /formula > using LEDs with ~4 MHz bandwidth.
| Type: | Article |
|---|---|
| Title: | Experimental Demonstration of High-Speed 4 × 4 Imaging Multi-CAP MIMO Visible Light Communications |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/JLT.2018.2796503 |
| Publisher version: | http://doi.org/10.1109/JLT.2018.2796503 |
| Language: | English |
| Additional information: | © 2018 IEEE. This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Modulation bandwidth, multi-band carrier-less amplitude and phase modulation, multiple-input multiple-output, visible light communications |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10044668 |
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