收稿日期: 2016-12-23
修回日期: 2017-04-23
网络出版日期: 2018-05-31
基金资助
国家自然科学基金（No.61420106011，No.61571282，No.61601279，No.61601277）；上海市科学技术发展基金（No.15511105400，No.15530500600，No.16511104100）；上海市教育发展基金会和上海市教育委员会“晨光计划”基金资助
Anti-interference Method of LED Visible Light Communication and Its Engineering Implementation
Received date: 2016-12-23
Revised date: 2017-04-23
Online published: 2018-05-31
苏云霞, 吴雅婷, 张雪凡 . LED可见光通信的抗干扰及其工程实现[J]. 应用科学学报, 2018 , 36(3) : 451 -460 . DOI: 10.3969/j.issn.0255-8297.2018.03.005
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.
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