OFDM-PWM scheme for visible light communications

Zhang, Tian, Ghassemlooy, Zabih, Rajbhandari, Sujan, Popoola, Wasiu and Guo, Shuxu (2017) OFDM-PWM scheme for visible light communications. Optics Communications, 385. pp. 213-218. ISSN 0030-4018

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Official URL: http://dx.doi.org/10.1016/j.optcom.2016.10.038

Abstract

In this paper, we propose an improved hybrid optical orthogonal frequency division multiplexing (O-OFDM) and pulse-width modulation (PWM) scheme for visible light communications. In this scheme, a bipolar O-OFDM signal is converted into a PWM format where the leading and trailing edges convey the frame synchronization and modulated information, respectively. The proposed scheme is insensitive to the non-linearity of the light emitting diode (LED) as LEDs are switched ‘on’ and ‘off’ between two points. Therefore, the tight requirement on the high peak-to-average-power-ratio (PAPR) in O-OFDM is no longer a major issue. The simulation and experimental 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: Article
Uncontrolled Keywords: Visible light communications; Pulse-width modulation; Optical orthogonal frequency division multiplexing; Peak-to-average-power-ratio
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 19 Dec 2016 11:41
Last Modified: 24 Oct 2017 08:51
URI: http://nrl.northumbria.ac.uk/id/eprint/28917

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