Flicker-free Visible Light Communication Using Three-level RZ Modulation
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초록
We introduce a new visible light communication (VLC) method in which three-level return-to-zero (RZ) modulation is used for flicker-free transmission. In the VLC transmitter, the three-level RZ modulation ensures that the average optical power is constant; thus, a flicker-free light-emitting diode (LED) light is achieved. In the VLC receiver, a resistor–capacitor high-pass filter is used for generating spike signals, which are used for data recovery while eliminating the 120 Hz optical noise from adjacent lighting lamps. In transmission experiments, we applied this method for wireless transmission of an air quality sensor message using the visible light of an LED array. This configuration is useful for the construction of indoor wireless sensor networks for air pollution monitoring using LED lights.
Abstract
We introduce a new visible light communication (VLC) method in which three-level return-to-zero (RZ) modulation is used for flicker-free transmission. In the VLC transmitter, the three-level RZ modulation ensures that the average optical power is constant; thus, a flicker-free light-emitting diode (LED) light is achieved. In the VLC receiver, a resistor–capacitor high-pass filter is used for generating spike signals, which are used for data recovery while eliminating the 120 Hz optical noise from adjacent lighting lamps. In transmission experiments, we applied this method for wireless transmission of an air quality sensor message using the visible light of an LED array. This configuration is useful for the construction of indoor wireless sensor networks for air pollution monitoring using LED lights.
참고문헌 (9)
- X. Ma, "Appropriate modulation scheme for visible light communication systems considering illumination", Electron. Lett, 48(18), pp.1137~1139 (2012)
- S. Rajagopal, "IEEE 802. 15. 7visible light communication : modulation schemes and dimming support", IEEE Commun. Mag, 50(3), pp.72~82 (2012)
- Y. K. Cheong, "Hazardless biomedical sensing data transmission using VLC", IEEE Sens. J, 13(9), pp.3347~3348 (2013)
- S. H. Lee, "A passive transponder for visible light identification using a solar cell", IEEE Sens. J, 15(10), pp.5398~5403 (2015)
- C. Yao, "Performance Comparison among ASK, FSK and DPSK in Visible Light Communication", Opt. Photonics J, 6, pp.150~154 (2016)
- A. M. Cailean, "Current Challenges for Visible Light Communications Usage in Vehicle Applications : A Survey", IEEE Commun. Surv. Tutor, 19(4), pp.2681~2703 (2017)
- V. P. Rachim, "Demonstration of long-distance hazard-free wearable EEG monitoring system using mobile phone visible light communication", Opt. Express, 25(2), pp.713~719 (2017)
- 이성호, "Illumination Control of LEDs in Visible Light Communication Using Manchester Code Transmission", 센서학회지, 25(5), pp.303~309 (2016), 한국센서학회[DOI]
- Zhengzhou Winsen Electronics Technology, "Air quality detection module user’s manual", 5~ (2014)