조명용 LED의 광전궤환을 이용한 가시광 무선인식장치
Visible Light Identification System Using Optoelectronic Feedback of A Lighting LED
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초록
In this paper, we used optoelectronic feedback to generate the carrier frequency for the ASK modulation of a lighting LED. A solar cell was used for photo-detector in the feedback circuit, and the LED light was ASK modulated by controlling the ON/OFF state of the switch that is installed in the feedback loop. The oscillation frequency of the optoelectronic feedback loop was about 50 kHz and the data rate of the ASK modulation was 9.6 kbps. In experiments, the optoelectronic feedback circuit was used for the ASK modulation of a lighting LED in the transponder of a visible light identification system, and data exchange between the transponder and the reader was successfully carried out.
Abstract
In this paper, we used optoelectronic feedback to generate the carrier frequency for the ASK modulation of a lighting LED. A solar cell was used for photo-detector in the feedback circuit, and the LED light was ASK modulated by controlling the ON/OFF state of the switch that is installed in the feedback loop. The oscillation frequency of the optoelectronic feedback loop was about 50 kHz and the data rate of the ASK modulation was 9.6 kbps. In experiments, the optoelectronic feedback circuit was used for the ASK modulation of a lighting LED in the transponder of a visible light identification system, and data exchange between the transponder and the reader was successfully carried out.
참고문헌 (5)
- Toshihiko Komine, "Fundamental analysis for visible-light communication system using LED lights", IEEE Transactions on Consumer Electronics, 50(1), pp.100~107 (2004)
- Joseph M. Kahn, "Wireless infrared communications", Proc. IEEE, 85(2), pp.265~298 (1997)
- A. M. Street, "Indoor optical wireless systems-a review", Opt. Quantum Electron, 29, pp.349~378 (1997)
- Seong-Ho Lee, "Reducing the effects of ambient noise light in an indoor optical wireless system using polarizers", Microwave And Optical Technology Letters, 40(3), pp.228~231 (2004)
- Reinhold Ludwig, "RF Circuit Design", pp.561~ (2009), Pearson Education