Enhanced Asymmetrically Clipped Optical OFDM for Next Generation PONs

Mohammed, Mohammed M.; Banawan, Mai; El-Sahn, Ziad A.

doi:10.1364/acpc.2015.asu2a.73

Cited by 1 publication

(1 citation statement)

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“…The other main research track has focused on designing techniques that combine several information streams of the same unipolar OFDM scheme [24]. In this context, there is an ever-growing list of variants of the ACO-OFDM and U-OFDM/Flip-OFDM techniques such as layered ACO-OFDM/spectral and energy efficient OFDM (SEE-OFDM) [25], [26]/enhanced ACO-OFDM [27], enhanced U-OFDM (eU-OFDM) [28], and, more recently, GeneRalizEd ENhancEd UnipolaR OFDM (GREENER-OFDM) [29].…”

Section: Introductionmentioning

confidence: 99%

A Novel Unipolar Transmission Scheme for Visible Light Communication

Dawoud

Héliot

Imran

et al. 2020

IEEE Trans. Commun.

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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 (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.

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