Visible light communications with hybrid OFDM-PTM

Ghassemlooy, Zabih, Ebrahimi, F., Rajbhandari, Sujan, Olyaee, S., Tang, Xuan and Zvanovec, Stanislav (2017) Visible light communications with hybrid OFDM-PTM. In: 2017 13th International Wireless Communications and Mobile Computing Conference (IWCMC). IEEE, Piscataway, pp. 894-898. ISBN 978-1-5090-4373-6

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Abstract

In visible light communications (VLC) system, the linearity of the light emitting diode is an issue when being intensity modulated with an analogue signal. In optical orthogonal frequency division multiplexing (O-OFDM) based VLC systems, the source nonlinearity imposes a tight restriction on the achievable peak-to-average-power-ratio. To address this issue, we propose a hybrid OFDM-PTM (pulse time modulation) scheme, where a bipolar O-OFDM signal is converted into digital PTM formats for switching `on' and `off' the light source. The simulation results demonstrate that the proposed scheme offers an improved bit error rate performance compared to the traditional asymmetrically clipped O-OFDM (ACO-OFDM).

Item Type:	Book Section
Uncontrolled Keywords:	Visible light communications, OFDM, PTM
Subjects:	H600 Electronic and Electrical Engineering
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	Becky Skoyles
Date Deposited:	05 Sep 2017 09:14
Last Modified:	12 Oct 2019 20:46
URI:	http://nrl.northumbria.ac.uk/id/eprint/31734

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