A novel unipolar transmission scheme for visible light communication

Dawoud, D. W., Héliot, F., Imran, M. A. and Tafazolli, R. (2020) A novel unipolar transmission scheme for visible light communication. IEEE Transactions on Communications, 68(4), pp. 2426-2437. (doi: 10.1109/TCOMM.2019.2963377)

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Abstract

This paper proposes a novel unipolar transceiver for visible light communication (VLC) by using orthogonal waveforms. The main advantage of our proposed scheme over most of the existing unipolar schemes in the literature is that the polarity of the real-valued orthogonal frequency division multiplexing (OFDM) sample determines the pulse shape of the continuous-time signal and thus, the unipolar conversion is performed directly in the analog instead of the digital domain. Therefore, our proposed scheme does not require any direct current (DC) biasing or clipping as it is the case with existing schemes in the literature. The bit error rate (BER) performance of our proposed scheme is analytically derived and its accuracy is verified by using Matlab simulations. Simulation results also substantiate the potential performance gains of our proposed scheme against the state-of-the-art OFDM-based systems in VLC; it indicates that the absence of DC shift and clipping in our scheme supports more reliable communication and outperforms the asymmetrically clipped optical-OFDM (ACO-OFDM), DC optical-OFDM (DCO-OFDM) and unipolar-OFDM (U-OFDM) schemes. For instance, our scheme outperforms ACO-OFDM by at least 3 dB (in terms of signal to noise ratio) at a target BER of 10 −4 , when considering the same spectral efficiency for both schemes.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Imran, Professor Muhammad
Authors: Dawoud, D. W., Héliot, F., Imran, M. A., and Tafazolli, R.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:IEEE Transactions on Communications
Publisher:IEEE
ISSN:0090-6778
ISSN (Online):1558-0857
Published Online:31 December 2019
Copyright Holders:Copyright © 2019 IEEE
First Published:First published in IEEE Transactions on Communications 68(4): 2426-2437
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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