OFDM-PWM scheme for visible light communications

Tian Zhang; Zabih Ghassemlooy; Sujan Rajbhandari; Wasiu Popoola; Shuxu Guo

doi:10.1016/j.optcom.2016.10.038

OFDM-PWM scheme for visible light communications

Tian Zhang, Zabih Ghassemlooy, Sujan Rajbhandari, Wasiu Popoola, Shuxu Guo

Mathematics, Physics and Electrical Engineering

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

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).

Original language	English
Pages (from-to)	213-218
Journal	Optics Communications
Volume	385
Early online date	4 Nov 2016
DOIs	https://doi.org/10.1016/j.optcom.2016.10.038
Publication status	Published - 15 Feb 2017

Keywords

Visible light communications
Pulse-width modulation
Optical orthogonal frequency division multiplexing
Peak-to-average-power-ratio

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10.1016/j.optcom.2016.10.038

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title = "OFDM-PWM scheme for visible light communications",

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 {\textquoteleft}on{\textquoteright} and {\textquoteleft}off{\textquoteright} 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).",

keywords = "Visible light communications, Pulse-width modulation, Optical orthogonal frequency division multiplexing, Peak-to-average-power-ratio",

author = "Tian Zhang and Zabih Ghassemlooy and Sujan Rajbhandari and Wasiu Popoola and Shuxu Guo",

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TY - JOUR

T1 - OFDM-PWM scheme for visible light communications

AU - Zhang, Tian

AU - Ghassemlooy, Zabih

AU - Rajbhandari, Sujan

AU - Popoola, Wasiu

AU - Guo, Shuxu

PY - 2017/2/15

Y1 - 2017/2/15

N2 - 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).

AB - 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).

KW - Visible light communications

KW - Pulse-width modulation

KW - Optical orthogonal frequency division multiplexing

KW - Peak-to-average-power-ratio

U2 - 10.1016/j.optcom.2016.10.038

DO - 10.1016/j.optcom.2016.10.038

M3 - Article

SN - 0030-4018

VL - 385

SP - 213

EP - 218

JO - Optics Communications

JF - Optics Communications

ER -

OFDM-PWM scheme for visible light communications

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Keywords

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