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A Novel Unipolar Transmission Scheme for Visible Light Communication

Dawoud, Diana, Heliot, Fabien, Imran, Muhammad and Tafazolli, Rahim (2020) A Novel Unipolar Transmission Scheme for Visible Light Communication IEEE Transactions on Communications.

TCOM-TPS-19-0096.pdf - Accepted version Manuscript

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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 (DCOOFDM) 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

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
Date : 22 December 2020
DOI : 10.1109/TCOMM.2019.2963377
Uncontrolled Keywords : Intensity modulation, Direct detection, unipolar transmission, orthogonal frequency division multiplexing, visible light communication.
Depositing User : James Marshall
Date Deposited : 27 Jan 2020 10:09
Last Modified : 27 Jan 2020 10:09

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