Visible light communications: Challenges and possibilities

O’Brien, Dominic; Zeng, Lubin; Minh, Hoa Le; Faulkner, Grahame; Walewski, Joachim W.; Randel, S.

doi:10.1109/pimrc.2008.4699964

Cited by 342 publications

(164 citation statements)

References 7 publications

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“…This is particularly important to VLC as it has been shown that SNR in a VLC channel is typically in excess of 60 dB electrical, allowing the receiver to easily detect multiple amplitude levels in a signal [12]. For the same signal power and bit error rate, the work of [29] shows a data rate of 200 Mbps using unipolar OFDM while [30] achieved 125 Mbps using a binary signaling scheme; both techniques reported the use of blue light optical filtering at the receiver.…”

Section: Visible Light Communications Challengesmentioning

confidence: 99%

“…The time for the phosphor to absorb and emit energy is approximately 110 ns for YAG:Ce, which limits the optical modulation bandwidth of the yellow light emission to about 2 MHz [73,74]. However, the blue component of a phosphor LED has an optical modulation bandwidth of approximately 12 MHz [12]. Therefore, by applying a blue filter at the receiver, the bandwidth of the system can be increased to match that of the blue LED at the expense of signal power incident on the receiver.…”

Section: Transmitter Element: Light Emitting Diodesmentioning

confidence: 99%

“…Utilization of unlicensed spectrum (e.g. 60 GHz RF carriers and optical carriers) [11,12,13] Specifically, the utilization of the visible light spectrum has recently received attention as a means to reduce the spectral load on radio systems. Communication using visible the light spectrum has been termed visible light communications (VLC)…”

Section: Introductionmentioning

confidence: 99%

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Design and Implementation of Color-Shift Keying for Visible Light Communications

Monteiro

Hranilovic

2014

J. Lightwave Technol.

172

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Color-shift keying (CSK) is a visible light communication (VLC) intensity modulation scheme, outlined in IEEE 802.15.7, that transmits data imperceptibly through the variation of the light color emitted by a red, green, and blue (RGB) light emitting diode (LED). Unlike other intensity modulation schemes, CSK guarantees that the intensity of the luminary will not fluctuate, thus limiting potential human health complications related to flickering light.In this work, a rigorous design framework for CSK constellations is presented. The benefits of the frame work are that it can optimize constellations while accounting for cross talk between the color communication channels formed by the colored LEDs.Unlike previous works, the method applies the study of colorimetry to optimize higher order CSK constellations such that the luminary functions with a desired operating color, allowing constellations to be designed to meet lighting industry quality metrics.

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Section: Visible Light Communications Challengesmentioning

confidence: 99%

Section: Transmitter Element: Light Emitting Diodesmentioning

confidence: 99%

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Design and Implementation of Color-Shift Keying for Visible Light Communications

Monteiro

Hranilovic

2014

J. Lightwave Technol.

172

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“…Indoor lighting using white LEDs has drawn much attention due to its energy efficiency [1]. Also, due to the advantage of LEDs being able to operate in high frequencies, communication using visible light (VLC) with these LEDs has drawn much interest as well [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…Also, due to the advantage of LEDs being able to operate in high frequencies, communication using visible light (VLC) with these LEDs has drawn much interest as well [1][2][3][4]. Over the past few decades, many indoor localization systems (ILSs) based on IR, Ultrasound, RFID, WLAN, Bluetooth, and UWB have been proposed, but these systems have limitations such as the necessity of additional infrastructure, low accuracy, noises, electromagnetic interference, multi-path effects, low security, and etc [5,6].…”

Section: Introductionmentioning

confidence: 99%

Development of a Localization System Based on VLC Technique for an Indoor Environment

Yi¹,

Kim²,

Yi³

2015

Journal of Electrical Engineering and Technology

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-In this paper, we develop an indoor localization device which embeds localization information into indoor light-emitting-diodes (LED) lighting systems. The key idea of our device is the use of the newly proposed "bit stuffing method". Through the use of stuff bits, our device is able to measure signal strengths even in transient states, which prohibits interference between lighting signals. The stuff bits also scatter the parts of the signal where the LED is turned on, thus provides quality indoor lighting. Additionally, for the indoor localization system based on RSSI and TDM to be practical, we propose methods for the control of LED lamps and compensation of received signals. The effectiveness of the proposed scheme is validated through experiments with a low-cost implementation including an indoor navigation task.

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