摘要
可见光通信是利用可见光波段进行高速数据传输的绿色通信技术,利用了未开发的频谱资源,具有电磁干扰低、能耗低等优点。针对室内短距离通信的需求,提出了一种基于白光LED的可见光室内通信方法。在该方法中由音频信号的放大及偏置电路、AD采集、时分复用编码及脉冲调制,白光功放驱动电路等组成的白光LED发射电路被设计,可见光接收机使用硅PIN型光电二极管作为光检测器件,并依次对其输出信号进行放大滤波、解码与解调,最后实时显示字符、播放音频信号。通过实验验证,该方法可在0.6~1.4m的范围内实现三路音频信号和三路字符信号的正确传输,误码率为0。
A visible light communication technology is a green communication technology which utilizes untapped spectrum resources and has the advantages of low electromagnetic interference,low energy consumption.A visible light indoor communication method based on white light LED is proposed to meet the needs of indoor short-distance communication.In this method the transmission circuit of white LED composed of audio signal amplifying and biasing circuit,AD acquisition,time-division multiplexing coding,pulse modulation,and power amplifier circuit for white light LED is designed.In the visible light receiver the silicon PIN photodiode is adopted as optical detection,its output signal is amplified,filtered,decoded and demodulated in sequence,Finally,the transmitted characters are real-time displayed and the transmitted multichannel audio signal is played through the microphone.In the experiment the three channels of audio signals and three channels of character signals are correctly transmitted and the bit error rate is zero in the range of 0.6~1.4 meters.
作者
槐利
张敏娟
林清
王楠
Huai Li;Zhang Minjuan;Lin Qing;Wang Nan(China Coal Technology Engineering Group Chongqing Research Institute,Chongqing 400039,China;Engineering and Technology Research Center of Shanxi Provincial for Optical—Electric Information and Instrument,North University of China,Taiyuan 030051,China;College of IoT Engineering,Hohai University,Changzhou 213022,China)
出处
《国外电子测量技术》
2020年第6期13-17,共5页
Foreign Electronic Measurement Technology
基金
国家自然科学基金青年基金(61505180)
山西省面上自然基金项目(201901D111163)资助。
关键词
可见光通信
白光LED
时分复用
脉冲编码调制
visible light communication
white light led
time-division multiplexing
pulse code modulation
