Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
권호 표지
DOI QR코드

DOI QR Code

Illumination Control in Visible Light Communication Using Manchester Code with Sync-Mark Signal

  • Lee, Seong-Ho (Department of Electronics and IT Media Engineering, Seoul National University of Science and Technology)
  • Received : 2020.04.06
  • Accepted : 2020.05.25
  • Published : 2020.05.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, we employed Manchester code for illumination control and flicker prevention of the light-emitting diode (LED) used in a visible light communication (VLC) system. In the VLC transmitter, the duty factor of the Manchester code was utilized for illumination control; in the VLC receiver, the spike signal from an RC-high pass filter was utilized to recover the transmitted signal whilst suppressing the 120-Hz noise arising from adjacent lighting lamps. Instead of the clock being transmitted in a separate channel, a syncmark signal was transmitted in front of each data byte and used as the reference time for transforming the Manchester code to non-return-to-zero (NRZ) data in the receiver. In experiments, the LED illumination was controlled in the range of approximately 12-84% of the constant wave (CW) light via changing of the duty factor from 10% to 90%. This scheme is useful for constructing indoor wireless sensor networks using LED light that is flicker-free and presents capability for illumination control.

Keywords

References

  1. S. Rajagopal, R. D. Roberts, and S. K. Lim, "IEEE 802.15.7 visible light communication: modulation schemes and dimming support", IEEE Commun. Mag., Vol. 50, No. 3, pp. 72-82, 2012. https://doi.org/10.1109/MCOM.2012.6163585
  2. X. Ma, K. J. Lee, and K. S. Lee, "Appropriate modulation scheme for visible light communication systems considering illumination", Electron. Lett., Vol. 48, No. 18, pp. 1137-1139, 2012. https://doi.org/10.1049/el.2012.2195
  3. A. M. Cailean and M. Dimian, "Current Challenges for Visible Light Communications Usage in Vehicle Applications: A Survey", IEEE Commun. Surv. Tutor., Vol. 19, No. 4, pp. 2681-2703, 2017. https://doi.org/10.1109/COMST.2017.2706940
  4. Y. K. Cheong, X. W. Ng, and W. Y. Chung, "Hazardless biomedical sensing data transmission using VLC", IEEE Sens. J., Vol. 13, No. 9, pp. 3347-3348, 2013. https://doi.org/10.1109/JSEN.2013.2274329
  5. V. P. Rachim, Y. Jiang, H. S. Lee, and W. Y. Chung, "Demonstration of long-distance hazard-free wearable EEG monitoring system using mobile phone visible light communication", Opt. Express, Vol. 25, No. 2, pp. 713-719, 2017. https://doi.org/10.1364/OE.25.000713
  6. S. H. Lee, "A passive transponder for visible light identification using a solar cell", IEEE Sens. J., Vol. 15, No. 10, pp. 5398-5403, 2015. https://doi.org/10.1109/JSEN.2015.2440754
  7. C. Yao, Z. Guo, G. Long, and H. Zhang, "Performance Comparison among ASK, FSK and DPSK in Visible Light Communication", Opt. Photonics J., Vol. 6, pp. 150-154, 2016. https://doi.org/10.4236/opj.2016.68B025