A Novel Orthogonal Transmission Scheme for Visible Light Communication

Dawoud, Diana W.; Héliot, Fabien; Imran, Muhammad Ali; Tafazolli, Rahim

doi:10.1109/icc.2018.8422648

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…Note that f n = 0 and, thus, contrary to U-OFDM in conjuction with the improved detection algorithm (iU-OFDM) propopsed in [36], the detection process in our proposed UOT scheme does not lead to channel attenuation. In (7), z[k], (∀k ∈ K), are the noise frequency components and z[n] (∀n ∈ N ) are the noise samples, which are equal to…”

Section: B Receiver Processmentioning

confidence: 99%

“…7 also shows that our UOT scheme outperforms the conventional OFDM (i.e., bipolar OFDM) scheme at a target BER of 10 −4 for any modulation order. This improvement can be understood by reconsidering the inputoutput relationship of our proposed scheme in (7), note that for given values of y l (n) (∀l ∈ L) both f n and z(n) follow a Bernoulli distributed RVs, and hence in this case f n and z[n] are binomial RVs. Thus, if we assumed that the two decoding phases in our proposed UOT scheme;…”

Section: B Receiver Processmentioning

confidence: 99%

“…An adverse consequence of the above mentioned technical restrictions is the dramatic decrease in efficiency of the legacy radio frequency (RF)-orthogonal frequency division multiplexing (OFDM) method when it is directly applied to VLC [7], [15]. This explains the continuous effort that has recently been put to adapt the legacy RF-OFDM method to VLC by converting its twodimensional (2D) time-domain signal into a one-dimensional unipolar signal [4].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: B Receiver Processmentioning

confidence: 99%

Section: B Receiver Processmentioning

confidence: 99%