VLC physical layer design based on Pulse Position Modulation (PPM) for stable illumination

Pradana, Angga; Ahmadi, Nur; Adiono, Trio; Cahyadi, Willy Anugrah; Chung, Yeon-Ho

doi:10.1109/ispacs.2015.7432798

Cited by 25 publications

(9 citation statements)

References 8 publications

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“…Linear modulations include on-off keying (OOK) and M -ary pulseamplitude modulation (PAM). These techniques are straightforward to implement and have been thoroughly investigated in the literature [4], [5], [6], [7]. OOK maintains a spectral efficiency of 1 bit/s/Hz, while the spectral efficiency of M -ary PAM, i.e., log 2 (M ) can be modified by changing the alphabet cardinality, M [8].…”

Section: Introductionmentioning

confidence: 99%

Energy Efficient ${M}$ -ary Frequency-Shift Keying-Based Modulation Techniques for Visible Light Communication

Azim

Rullier²,

Guennec

et al. 2019

IEEE Trans. Cogn. Commun. Netw.

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In this article, we introduce two variants of energy efficient M-ary frequency-shift keying (FSK) for low data rate/low power Internet-of-Things (IoT) applications. Both variants, i.e., M-ary direct current (DC)-FSK and M-ary unipolar (U)-FSK are compatible with intensity-modulation and direct detection (IM-DD) implementation of visible light communication (VLC). The two techniques intrinsically differ in the manner of attaining a non-negative signal for intensity-modulation. Mary DC-FSK uses a DC-offset, while, M-ary U-FSK sequentially transmits the positive and the sign flipped negative halves of the bipolar M-ary FSK symbols. The spectral efficiencies of Mary DC-FSK and M-ary U-FSK are augmented by biorthogonal extension of frequency waveforms resulting in 2M-ary biDC-FSK and 2M-ary biU-FSK, respectively. Two optimal maximum likelihood (ML) receiver configurations with different complexities are introduced for M-ary DC-FSK/2M-ary biDC-FSK. Whereas, for M-ary U-FSK/2M-ary biU-FSK, an optimal ML and a suboptimal receiver are proposed. We appraise the performance of these methods in terms of Euclidean distance, bit error rate (BER) in additive white Gaussain noise and time dispersive channels, energy efficiency with respect to spectral efficiency and computational complexity. Simulations confirm that the proposed techniques are more energy efficient than classical M-ary pulseamplitude modulation (PAM) in an absolute sense.

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Section: Introductionmentioning

confidence: 99%

Energy Efficient ${M}$ -ary Frequency-Shift Keying-Based Modulation Techniques for Visible Light Communication

Azim

Rullier²,

Guennec

et al. 2019

IEEE Trans. Cogn. Commun. Netw.

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“…In this paper, an indoor downlink network of NOMA-VLC equipped with one LED and N users is considered, and 8-ary Pulse Position Modulation (PPM) is utilized to modulate the signals [23]. Fig.…”

Section: B System Modelmentioning

confidence: 99%

Optimal Power Allocation Scheme Based on Multi-Factor Control in Indoor NOMA-VLC Systems

Shang

Tang

et al. 2019

IEEE Access

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In order to overcome the limitation of narrow modulation bandwidth on the performance in the visible light communication (VLC) systems, non-orthogonal multiple access (NOMA) is applied to the downlink VLC networks in this paper to improve the sum rate performance effectively. We first propose an optimal power allocation strategy which is based on the multi-factor control (MFOPA), aiming to maximize the total system capacity subject to ensuring all users' quality of service (Qos) and fairness, as well as illumination requirements. The analytical results indicate that the proposed MFOPA could provide higher system sum rate and better user fairness as well as guarantee the Qos and eye safety of each user at the same time when compared with the static power allocation (SPA) and gain ratio power allocation (GRPA) schemes, especially in high demand for signal-to-interference-plus-noise ratio (SINR). What is more, considering the residual interference may exist during the successive interference cancellation (SIC) at the receiver, namely imperfect SIC, the interference cancellation factor is also taken into account in MFOPA strategy. The numerical results are shown to demonstrate the robustness and effectiveness of the MFOPA in NOMA-VLC when the residual interference remains. INDEX TERMS Visible light communication (VLC), non-orthogonal multiple access (NOMA), power allocation, multiple factors, imperfect successive interference cancellation (SIC).

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“…Meskipun demikian, transmisi data-data berukuran kecil seperti teks telah cukup memadahi. Hasil dari penelitian ini juga merupakan peningkatan dari performa penelitian sebelumnya [31][32].…”

Section: Pengujian Berunclassified

Rancang Bangun Sistem Komunikasi Cahaya Tampak Dengan Modulasi 2-PWM Berbasis Mikrokontroller

Adiono¹,

Pradana²

2018

sisfo

Self Cite

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Visible light communication (VLC) uses visible light as a communication medium. Some considerations are required to build a VLC system, including the physical-and the MAC-layer. The modulation technique is one part of the physicallayer that has substantial role because it can determine the performance of VLC systems (e.g. transfer speed, dimming, flickering, BER). The modulation technique applied to VLC system must support fast access by utilizing the available bandwidth along with low BER value, then it should not cause flickering or dimming effects that can influence the LED function as a lighting device. In this study, the VLC system is designed based on 2-PWM modulation (variance of PWM). The designed system includes transmitter and receiver with STM32F4 Microcontroller as DSP. Evaluation is done by comparing bitrate and BER between 1-PWM with 2-PWM in which the data transfer rate of 2-PWM is higher than 1-PWM, but its optical channel distance is shorter than 1-PWM modulation.

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VLC physical layer design based on Pulse Position Modulation (PPM) for stable illumination

Cited by 25 publications

References 8 publications

Energy Efficient ${M}$ -ary Frequency-Shift Keying-Based Modulation Techniques for Visible Light Communication

Energy Efficient ${M}$ -ary Frequency-Shift Keying-Based Modulation Techniques for Visible Light Communication

Optimal Power Allocation Scheme Based on Multi-Factor Control in Indoor NOMA-VLC Systems

Rancang Bangun Sistem Komunikasi Cahaya Tampak Dengan Modulasi 2-PWM Berbasis Mikrokontroller

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