水下蓝光LED可见光语音通信系统设计

Design of Visible Light Communication System for Underwater Blu-ray LED

为测试和分析水下可见光通信系统的传输特性,设计了一款水下蓝光LED可见光语音通信系统,实现了语音信号的单向、短距离通信传输。采用模拟仿真方法构建了一套水下可见光通信系统,主要由发射电路、接收电路、电源模块以及透明水槽(模拟水下光学信道)等几部分组成,测试并分析了该系统的幅频响应特性。实验结果表明,当发射端输入信号电压幅值不变时,接收端输出信号电压幅值随发射端输入信号电压幅值增加变化较小,且频率和相位较稳定。

In order to test and analyze the transmission characteristics of underwater visible light communication system,a underwater blue light LED visible speech communication system is designed to realize the one-way and short distance communication transmission of the voice signal.In the experiment,a set of underwater visible light communication system is constructed by simulation and simulation,which mainly consists of the transmitting circuit,the receiving circuit,the power module and the transparent channel（the underwater optical channel）.The amplitude frequency response characteristics of the system are tested and analyzed.The experimental results show that when the voltage amplitude of the input signal at the transmitting end is constant,the voltage amplitude of the output signal at the receiving end gradually decreases with the increase of the frequency of the input signal at the transmitting end. When the frequency of the input signal at the transmitting end is constant,the voltage amplitude of the output signal at the receiving end changes little with the increase of the voltage amplitude of the input signal at the transmitting end,and the frequency and phase are relatively stable.