水下无线光通信系统中可变增益放大器的实现

摘要

A variable gain amplifier can be used to reduce the dynamic range of the received signal in an underwater optical wireless communication system. Two methods based on digital to analog converter and digital potentiometer, were discussed in detail. Both the methods can be used to control the amplification gain. Simulation was carried out for the method based on digital potentiometer. The results show that the signal dynamic range is effectively compressed and tends to be stable.%为了减小水下无线光通信系统中接收信号的动态范围,采用可变增益放大器,论述了基于数字模拟转换器和数字电位器实现可控增益的两种方法,并对基于数字电位器实现的方法进行了仿真实验.结果表明,该方法能有效压缩信号的动态范围,并使其趋于稳定.