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

应用科学学报 ›› 2018, Vol. 36 ›› Issue (3): 451-460.doi: 10.3969/j.issn.0255-8297.2018.03.005

LED可见光通信的抗干扰及其工程实现

苏云霞, 吴雅婷, 张雪凡

上海大学特种光纤与光接入网重点实验室, 上海 200444

收稿日期:2016-12-23 修回日期:2017-04-23 出版日期:2018-05-31 发布日期:2018-05-31
通信作者: 吴雅婷,副教授,研究方向:移动通信、无线通信与光通信融合,E-mail:ytwu@shu.edu.cn E-mail:ytwu@shu.edu.cn
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

SU Yun-xia, WU Ya-ting, ZHANG Xue-fan

Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200444, China

Received:2016-12-23 Revised:2017-04-23 Online:2018-05-31 Published:2018-05-31

摘要/Abstract

摘要：

针对LED光通信容易受到杂散灯光和灰尘等干扰问题，从多个方面提出了抗干扰措施.在频域上，采用了滤除带外噪声的抗干扰滤波器；在时域上，提出采用锁相解调方法进一步过滤掉同频率不同相位的噪声，并从理论上推导了锁相解调的表达式.在信号调制方法上，提出了LED光通信兼照明的抗干扰发射电路驱动方法；最后提出的灵敏光接收电路方案提高了信号光电转换效果.测试结果表明，该方案对杂散光具有很好的抗干扰效果，通信距离可达到20 m以上，具有实际应用价值.

关键词: LED可见光通信, 抗干扰, 锁相解调, 带通滤波

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

中图分类号:

TN929.1

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.

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.

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LED可见光通信的抗干扰及其工程实现

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

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