Multi-Dimensions Encoding Scheme for Visible Light Communication System

Ye, 亢烨 Kang; Xizheng, 柯熙政 Ke

doi:10.3788/cjl201542.0205001

Cited by 5 publications

(2 citation statements)

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“…The change in color temperature has a small impact on the illumination intensity, which confirms the conclusion of the simulation. In Figure 13, the comparison between the calculated color index and the measured color index according to Equations ( 6) and (7) shows that the theoretical value of the color index is in good agreement with the measured value. The color index is greatly affected by the color temperature.…”

Section: Dimming Experimentsmentioning

confidence: 70%

“…There have been studies on the use of multi-color LEDs for transmitting information in visible light communication systems. In 2015, Ke X Z et al constructed an RGB LED visible light communication video transmission system and completed an experiment on video data stream transmission at a transmission rate of 1.5 Mbps [7]. In 2018, Zhu et al conducted an experiment on an indoor visible light communication system using RG-BCY LEDs and the wavelength division multiplexing (WDM) technique.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on Chromaticity Control in Visible Light Communication Systems

Ke,

Wang,

Qin

et al. 2023

Photonics

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To apply visible light communication systems in different scenarios, this article utilizes an excellent temperature-adjustable light source mixed with RGB LEDs and applies it in a visible light communication system. It uses color division multiplexing technology to achieve three-channel communication, thereby improving the communication bandwidth of the system. The communication system adopts three constant current driving circuits to control the duty cycle of Pulse Width Modulation (PWM) of each channel, thereby changing the proportion of RGB LEDs, and obtaining different color temperatures to achieve the purpose of color control for mixed-color LEDs. The experimental results show that when adjusting the color temperature, the change in luminous flux is very small, with fluctuations of less than 2.24%. When adjusting the brightness, the color temperature fluctuation is within 40 K, which is less than the 50 K color temperature limit that the human eye can distinguish, and the average color temperature error is 0.609%. Color tolerance less than 5.5 × 10−3 indicates good dimming effect, and the communication performance of the system is better in the high color temperature range, which is significantly superior to the low color temperature range. When the error rate is below 3.8 × 10−3, the total modulation bandwidth of the three channels reaches 11.7 MHz.

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Section: Dimming Experimentsmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%