基于LED可见光通信系统的设计

Design of visible light communication system based on LED

基于LED的可见光通信技术能够实现室内照明与无线通信的双重功能,因此被越来越多的人们所关注。基于此设计了一种以STM32为核心处理器,由发送端和接收端两部分构成完成了可见光通信系统。首先将文字字符信息经光电转换器通过LED可见光发送到空气中,再通过LED可见光接收信息经过解调、放大等恢复原文字字符,再连接到计算机软件串口调试助手,去观察发送端的输入和接收端的输出信息的文字字符,来实现基于LED可见光的通信。实验结果表明当发射端LED灯与接收端LED灯处于同一水平线且在一定距离内能接收到正确的字符信息,该系统具有误码率低、传输速率快、可靠性高、实用性强等特点。

Indoor lighting and wireless communication can be realized by using LED,Therefore more and more people pay attention to it.Based on this,a kind of visible light communication system is designed with STM32 as the core processor,which is composed of two parts:the sender and the receiver.First,the text character information is sent to the air through the LED visible light through the photoelectric converter,then the original text character is restored through the LED visible light receiving information through demodulation,amplification,etc.,and then connected to the computer software serial port debugging assistant to observe the text character of the input and output information of the sending end,so as to realize the communication based on the LED visible light.The experimental results show that the system has the characteristics of low bit error rate,fast transmission rate,high reliability and strong practicability when the LED lamp at the transmitter and the LED lamp at the receiver are in the same horizontal line and can receive the correct character information within a certain distance.