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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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

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