LED可见光通信的抗干扰及其工程实现

doi:10.3969/j.issn.0255-8297.2018.03.005

Abstract

Abstract:

Light-emitting diode (LED) visible light communication (VLC) is a promising technology due to its unique advantages. However, it suffers from the problem of light interference. This paper proposes anti-interference methods from several aspects aiming at LED VLC’s vulnerability to the interference of stray light and dust. In frequency domain, we propose an anti-interference flter which flters out the outside-band noise. In time domain, we propose phase-lock-demodulation related coherent demodulation method and theoretically deduce the process. In method of signal modulation, we propose a driving method of anti-interference transmission circuit for LED optical communication and illumination. To improve the effectiveness of photo-electric conversion, we propose a sensitive optical receiver circuit scheme. Experimental results indicate that the proposed scheme has good anti-interference ability to stray light. The communication distance exceeds 20 m, which shows the practical application value of our scheme.

Key words: light-emitting diode (LED) visible light communication, band-pass flter, phase lock demodulation, anti-interference

CLC Number:

TN929.1

SU Yun-xia, WU Ya-ting, ZHANG Xue-fan. Anti-interference Method of LED Visible Light Communication and Its Engineering Implementation[J]. Journal of Applied Sciences, 2018, 36(3): 451-460.

References

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Anti-interference Method of LED Visible Light Communication and Its Engineering Implementation

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