Multilevel Transmission in Dimmable Visible Light Communication Systems

Lee, Sang Hyun; Ahn, Kang-Il; Kwon, Jong-Kee

doi:10.1109/jlt.2013.2281209

Cited by 35 publications

(22 citation statements)

References 17 publications

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“…In the design task of interest involving a nonconvex combinatorial constraint, simple normalization [16], [20] does not guarantee the feasibility of the binary codebook. Therefore, it invokes a new training strategy that directly handles dimming constraints via stochastic binarization (10).…”

Section: B Conventional Training Methodsmentioning

confidence: 99%

A Deep Learning Approach to Universal Binary Visible Light Communication Transceiver

Lee

Quek

Lee

2020

IEEE Trans. Wireless Commun.

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This paper studies a deep learning (DL) framework for the design of binary modulated visible light communication (VLC) transceiver with universal dimming support. The dimming control for the optical binary signal boils down to a combinatorial codebook design so that the average Hamming weight of binary codewords matches with arbitrary dimming target. An unsupervised DL technique is employed for obtaining a neural network to replace the encoder-decoder pair that recovers the message from the optically transmitted signal. In such a task, a novel stochastic binarization method is developed to generate the set of binary codewords from continuous-valued neural network outputs. For universal support of arbitrary dimming target, the DL-based VLC transceiver is trained with multiple dimming constraints, which turns out to be a constrained training optimization that is very challenging to handle with existing DL methods. We develop a new training algorithm that addresses the dimming constraints through a dual formulation of the optimization. Based on the developed algorithm, the resulting VLC transceiver can be optimized via the end-to-end training procedure. Numerical results verify that the proposed codebook outperforms theoretically best constant weight codebooks under various VLC setups.

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Section: B Conventional Training Methodsmentioning

confidence: 99%

A Deep Learning Approach to Universal Binary Visible Light Communication Transceiver

Lee

Quek

Lee

2020

IEEE Trans. Wireless Commun.

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“…PWM can also improve the dimming levels over traditional OOK [25][26], where PWM-based dimming control provides a wide range of dimming levels [18,[27][28]. A key advantage is enhancing power consumption [27,29].…”

Section: S Si Im Mp Pl Le E D De Es Si Ig Gn N M Mo Od Du Ul La At Timentioning

confidence: 99%

An In-depth Survey of Viisiiblle Liight Communiicatiion Modullatiing and Codiing schemes for Diimmiing/Flliicker Avoiidance Technollogiies

Ghandour

Zekry

Mohammed

et al. 2019

Menoufia Journal of Electronic Engineering Research

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“…Furthermore, various pulse position modulation (PPM) schemes have been introduced into VLC systems for achieving different design objectives [50]- [52], where the basic concept is to map the modulated signal into 2 M legitimate time-slots for M -ary PPM [53]. Another bandwidth-efficient baseband modulation technique is constituted by pulse amplitude modulation (PAM) [35], which was also invoked and evaluated in VLC systems [26], [54]. However, the signals modulated by multiple intensity levels may suffer from nonlinear distortions due to the LEDs intensity-dependent luminous efficacy [13].…”

Section: Phy Techniques 1) Modulation Schemesmentioning

confidence: 99%

Optimization of Visible-Light Optical Wireless Systems: Network-Centric Versus User-Centric Designs

Zhang

Hanzo

2018

IEEE Commun. Surv. Tutorials

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Abstract-In order to counteract the explosive escalation of wireless tele-traffic, the communication spectrum has been gradually expanded from the conventional radio frequency (RF) band to the optical wireless (OW) domain. By integrating the classic RF band relying on diverse radio techniques and optical bands, the next-generation heterogeneous networks (HetNets) are expected to offer a potential solution for supporting the ever-increasing wireless tele-traffic. Owing to its abundant unlicensed spectral resources, visible light communications (VLC) combined with advanced illumination constitute a competent candidate for complementing the existing RF networks. Although the advantages of VLC are multi-fold, some challenges arise when incorporating VLC into the classic RF HetNet environments, which may require new system architectures. The user-centric (UC) design principle for VLC environments constitutes a novel and competitive design paradigm for the super dense multi-tier cell combinations of HetNets. The UC concept may be expected to become one of the disruptive techniques to be used in the forthcoming fifthgeneration era. This paper provides a comprehensive survey of visible-light-aided OW systems with special emphasis on the design and optimization of VLC networks, where the radically new UC design philosophy is reviewed. Finally, design guidelines are provided for VLC systems.

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Multilevel Transmission in Dimmable Visible Light Communication Systems

Cited by 35 publications

References 17 publications

A Deep Learning Approach to Universal Binary Visible Light Communication Transceiver

A Deep Learning Approach to Universal Binary Visible Light Communication Transceiver

An In-depth Survey of Viisiiblle Liight Communiicatiion Modullatiing and Codiing schemes for Diimmiing/Flliicker Avoiidance Technollogiies

Optimization of Visible-Light Optical Wireless Systems: Network-Centric Versus User-Centric Designs

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