Browse > Article
http://dx.doi.org/10.5515/KJKIEES.2011.22.5.560

Reducing the Effects of Noise Light in A Visible Light Communication System Using Orthogonal Polarizers  

Hwang, Da-Hyun (Graduate School of NID Fusion Technology, Seoul National University of Science and Technology)
Lee, Seong-Ho (Department of Electronic & Information Engineering, Seoul National University of Science and Technology)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.22, no.5, 2011 , pp. 560-567 More about this Journal
Abstract
In this paper, we reduced the optical noise interference using polarizers in a visible light communication system. In a transmitter, two light-emitting diodes(LEDs) are modulated synchronously by the original and the reversed signals of the transmitted data, and the two LED lights are radiated through orthogonal polarizers. In a receiver, two optical signals are detected through orthogonal polarizers and differentially amplified to remove the optical noise. In an environment that noise light from a fluorescent lamp is much stronger than the signal, the receiver with orthogonal polarizers removed the 120 Hz noise, and synchronous light transmission of the original and the reversed signals using two LEDs reduced the illumination flickering to about one-eighth that using one LED.
Keywords
Visible Light Communication; Optical Noise; Polarizer; LED; Noise Reduction;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Joseph M. Kahn, John R. Barry, "Wireless infrared communications", Proc. IEEE, vol. 85, no. 2, pp. 265-298, 1997.   DOI
2 A. M. Street, P. N. Stavrinou, D. C. O'Brien, and D. J. Edwards, "Indoor optical wireless systems-a review", Opt. Quantum Electron., vol. 29, pp. 349-378, 1997.   DOI
3 Seong-Ho Lee, "Reducing the effects of ambient noise light in an indoor optical wireless system using polarizers", Microwave and Optical Technology Letters, vol. 40, no. 3, pp. 228-231, Feb. 2004.   DOI
4 Eugene Hecht, Optics, 2nd Ed., p. 278, Addison Wesley, 1987
5 Joseph C. Papais, Fiber Optic Communications, 5th Ed., p. 75, Prentice Hall, 2005.