Constellation Design Enhancement for Color-Shift Keying Modulation of Quadrichromatic LEDs in Visible Light Communications

Xiao, Liang; Yuan, Man; Wang, Jiaheng; Ding, Zhi; Jiang, Ming; Zhao, Chunming

doi:10.1109/jlt.2017.2720579

Cited by 57 publications

(32 citation statements)

References 28 publications

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“…, where c denotes the LED color, c ∈ {R,A,G,B}. In this paper, each QLED is assumed to employ the general CSK constellation that satisfies the maximum total power [7]. The nonnegative signals also need to satisfy the maximum amplitude value constraint to avoid the clipping distortion and the chromaticity constraint [5].…”

Section: System Modelmentioning

confidence: 99%

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Effective Receiver Design for MIMO Visible Light Communication with Quadrichromatic LEDs

Tran

Kim

2019

Electronics

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In this paper, we propose a receiver designing principle for the multiple-input multiple-output (MIMO) visible light communication (VLC) systems with quadrichromatic light emitting diodes (QLEDs). To simultaneously transmit multiple data streams, the system consists of multiple QLEDs and multiple receivers; each includes four photodiodes (PDs). We optimize the Euclidean distance of the received signal over some constraints by considering the normal vectors of the receivers. The numerical results show that our proposed receiver design has a better bit error rate (BER) performance in comparison with the conventional receiver.

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Section: System Modelmentioning

confidence: 99%

“…Color shift keying (CSK) is a modulation method that exploits the diversity of a multi color LED to modulate the data with the intensity signals of different colors [6]. The authors in [7] recently proposed an enhanced CSK with QLED and considered various illumination qualities.…”

Section: Introductionmentioning

confidence: 99%

Effective Receiver Design for MIMO Visible Light Communication with Quadrichromatic LEDs

Tran

Kim

2019

Electronics

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“…Intensity modulation and direct detection (IM/DD) technique is considered a major approach to convey a message via a nonnegative real-valued optical signal [9]- [11]. In addition, the average and peak intensity restriction imposed by LED property, human physiologic effect and external preference require a careful design of binary transmission strategy when dimming control is achieved by utilizing on-off keying (OOK) [12]- [15].…”

Section: Introductionmentioning

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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“…In the literature, various techniques have been proposed for interference mitigation. In other related works, the concept of frequency reuse has been proposed to reduce the interference in VLC where different colors are modulated to carry signal in neighboring LEDs. This reduces the interference between adjacent LED cells and improves the system performance.…”

Section: Introductionmentioning

confidence: 99%

Interference mitigation technique with coverage improvement in indoor VLC system

Shashikant

Garg

Sharma

2018

Trans Emerging Tel Tech

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We consider an indoor visible light communication system in which an arbitrary number of light‐emitting diodes are transmitting the information to the users. Due to the circular field of view of the light‐emitting diode transmitters, there is always a trade‐off between the coverage and interference at the receiving end. Any approach to increase the coverage area increases the overlapping area of two or more field of views resulting in severe interference at the receiver. In this paper, we propose a method that simultaneously reduces the interference due to multiple sources in an indoor visible light communication system and improves the coverage area. The signal‐to‐interference ratio (γSIR)–based approach is used for analyzing the outage and error performances. Specifically, the effect of the proposed method is investigated on various performance metrics such as signal‐to‐interference ratio, coverage probability, and bit error rate. The effect of ambient light on system performance is also incorporated in the analysis.

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Constellation Design Enhancement for Color-Shift Keying Modulation of Quadrichromatic LEDs in Visible Light Communications

Cited by 57 publications

References 28 publications

Effective Receiver Design for MIMO Visible Light Communication with Quadrichromatic LEDs

Effective Receiver Design for MIMO Visible Light Communication with Quadrichromatic LEDs

A Deep Learning Approach to Universal Binary Visible Light Communication Transceiver

Interference mitigation technique with coverage improvement in indoor VLC system

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