A Spectral-Efficient Transmission Scheme for Dimmable Visible Light Communication Systems

Zhao, Shancheng; Ma, Xiao

doi:10.1109/jlt.2017.2701413

Cited by 16 publications

(22 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To tackle these issues, the relaxed dimming constraint, which can be viewed as a generalization of the dimming constraint, has been recently addressed in [15] such that the transmit intensity averaged over codebook S d is controlled. This constraint can be expressed as…”

Section: System Modelmentioning

confidence: 99%

“…Since a feasible set generated from (3) has, in general, a larger population than a feasible set obtained from the strict dimming constraint (2), as compared to the exact CWC method in [24], a higher degree of freedom can be expected for the semi-CWC design. It has been shown in [15] that the code rate of semi-CWCs can be enhanced over the CWC. In general, the new dimming constraint allows a higher dimensional codebook than the exact CWC (2).…”

Section: System Modelmentioning

confidence: 99%

“…For comparison with theoretically known best CWC configurations under ML decoding presented in [24], the neural 2 The complexity of the DNN transceiver is given by O(M 3 + N M 2 ), which is comparable to the ML decoder of O(N 2 M ) for moderate M and N . 3 Such a short dimming control coding with N = 8 has been typically adapted in the literature [14], [15], [34]. 4 The OOK codebook S d designed for a specific d < N is simply modified to obtain S N −d by flipping binary symbols in each codeword.…”

Section: A Ideal Led and Fixed Channel Setupmentioning

confidence: 99%

“…4 The OOK codebook S d designed for a specific d < N is simply modified to obtain S N −d by flipping binary symbols in each codeword. Hence, this setup results in the encoder supporting 9 dimming levels as considered in [11], [14], [15]. network is first trained to find a codebook of good minimum distance property under the ideal linear LED and LoS setup.…”

Section: A Ideal Led and Fixed Channel Setupmentioning

confidence: 99%

See 3 more Smart Citations

A Deep Learning Approach to Universal Binary Visible Light Communication Transceiver

Lee

Quek

Lee

2020

IEEE Trans. Wireless Commun.

View full text Add to dashboard Cite

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.

show abstract

Section: System Modelmentioning

confidence: 99%

Section: System Modelmentioning

confidence: 99%

Section: A Ideal Led and Fixed Channel Setupmentioning

confidence: 99%

Section: A Ideal Led and Fixed Channel Setupmentioning

confidence: 99%

See 2 more Smart Citations

A Deep Learning Approach to Universal Binary Visible Light Communication Transceiver

Lee

Quek

Lee

2020

IEEE Trans. Wireless Commun.

View full text Add to dashboard Cite

show abstract

“…More importantly, VLC system can provide the dual functions of communication and illumination, which is green and energy saving [10], [11]. Commonly, different optical intensities are required for satisfying the different illumination requirements in the practical VLC applications, which is referred to as the dimmable VLC system or VLC system with dimming control [12]- [14]. In the IM/DD based VLC systems with dimming control, orthogonal frequency-division multiplexing (OFDM) is an attractive scheme and has been widely investigated because it can effectively resist the inter-symbol-interference (ISI) while improving spectral efficiency [15]- [18].…”

Section: Introductionmentioning

confidence: 99%

Spectral-Efficient L/E-ACO-SCFDM-Based Dimmable Visible Light Communication System

et al. 2019

View full text Add to dashboard Cite

In this paper, we propose a dimmable visible light communication (VLC) system based on spectral-efficient layered/enhanced asymmetrically clipped optical single-carrier frequency-division multiplexing (L/E-ACO-SCFDM). L/E-ACO-SCFDM superimposes multi-layer ACO-SCFDMs occupying different subcarriers for enhancing the spectral efficiency of the system. Both the adjustable layer polarities and the low peak-to-average-power ratio property of ACO-SCFDM make it better suited to the linearity-limited VLC system. Meanwhile, L/E-ACO-SCFDM has the signal-to-noise ratio averaging advantage, which can effectively resist the high-frequency distortion caused by the bandwidth limitation of the VLC system. Based on the maximization of spectral efficiency of the system, the layer amplitudes, layer spectral efficiencies, and bias voltage are jointly optimized for providing the efficient communication under different illumination requirements. Benefiting from the numerous strengths, the proposed L/E-ACO-SCFDM-based dimming scheme can achieve at least 22.0% average spectral efficiency gain compared with several state-of-the-art OFDM-based dimming schemes within the same dimming range, which shows the great superiority for future practical applications of VLC.

show abstract

Optimization of the two-stage common-emitter transistor amplifier for equalization circuit in visible light communication system

Huang

Wang

et al. 2018

Opt Quant Electron

View full text Add to dashboard Cite

A Spectral-Efficient Transmission Scheme for Dimmable Visible Light Communication Systems

Cited by 16 publications

References 32 publications

A Deep Learning Approach to Universal Binary Visible Light Communication Transceiver

A Deep Learning Approach to Universal Binary Visible Light Communication Transceiver

Spectral-Efficient L/E-ACO-SCFDM-Based Dimmable Visible Light Communication System

Optimization of the two-stage common-emitter transistor amplifier for equalization circuit in visible light communication system

Contact Info

Product

Resources

About