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Visible Light Communications: Filter-less Wavelength Division Multiplexing

Haigh, PA; Burton, A; Chvojka, P; Zvanovec, S; Ghassemlooy, Z; Darwazeh, I; (2020) Visible Light Communications: Filter-less Wavelength Division Multiplexing. In: Proceedings of the 2020 12th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP). IEEE: Porto, Portugal. Green open access

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Abstract

In this paper, we propose a new receiver and demodulation method for use in wavelength division multiplexed visible light communications systems, utilising the natural diversity offered by photodiodes. This is based on the wavelength dependent photodiode responsivities, which lead to different signal-to-noise ratios at the receiver. Using this method, it is possible to transmit independent information using on different wavelengths but where signals occupy the same electrical frequency range and where they would, otherwise, interfere. We illustrate and experimentally demonstrate that through simple subtractions the signals can be extracted with the constellations showing Q-factors corresponding to sufficiently low bit error rates.

Type: Proceedings paper
Title: Visible Light Communications: Filter-less Wavelength Division Multiplexing
Event: 2020 12th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)
ISBN-13: 978-1-7281-6743-5
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/CSNDSP49049.2020.9249495
Publisher version: https://doi.org/10.1109/CSNDSP49049.2020.9249495
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Digital signal processing, non-orthogonal, optical communications, visible light communications, wavelength division multiplexing
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10119482
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