Mobile User Connectivity in Relay-Assisted Visible Light Communications

Pešek, Petr, Zvanovec, Stanislav, Chvojka, Petr, Bhatnagar, Manav, Ghassemlooy, Zabih and Saxena, Prakriti (2018) Mobile User Connectivity in Relay-Assisted Visible Light Communications. Sensors, 18 (4). p. 1125. ISSN 1424-8220

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Official URL: http://dx.doi.org/10.3390/s18041125

Abstract

In this paper, we investigate relay-assisted visible light communications (VLC) where a mobile user acts as a relay and forwards data from a transmitter to the end mobile user. We analyse the utilization of the amplify-and-forward (AF) and decode-and-forward (DF) relaying schemes. The focus of the paper is on analysis of the behavior of the mobile user acting as a relay while considering a realistic locations of the receivers and transmitters on a standard mobile phone, more specifically with two photodetectors on both sides of a mobile phone and a transmitting LED array located upright. We also investigate dependency of the bit error rate (BER) performance on the azimuth and elevation angles of the mobile relay device within a typical office environment. We provide a new analytical description of BER for AF and DF-based relays in VLC. In addition we compare AF and DF-based systems and show that DF offers a marginal improvement in the coverage area with a BER < 10–3 and a data rate of 100 Mb/s. Numerical results also illustrate that relay-based systems offer a significant improvement in terms of the coverage compared to direct non-line of sight VLC links.

Item Type: Article
Uncontrolled Keywords: amplify-and-forward relaying; cooperative communication; decode-and-forward relaying; 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 08:47
Last Modified: 21 May 2018 09:00
URI: http://nrl.northumbria.ac.uk/id/eprint/34283

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