基于突发光信号的高速数据采集系统的设计与研究

Design and research of high-speed data acquisition system based on burst optical signal

在155 Mb/s传输速率下,研究了基于DSP技术的高速数据采集系统的设计与实现,根据无源光网络(PON)中突发信号的特点,系统分为模拟信号接收模块和数字信号处理模块,模拟信号接收模块由前置放大器AD8015、峰值检波电路、限幅放大器MAX3761、复位脉冲产生电路几部分构成,实现高速光突发信号的接收和放大;数字信号处理模块由高速A/D转换器AD9481和高速DSP芯片TMS320C6201组成,实现高速光突发信号的模数转换,正确检测出突发光信号发射机激活发光期间的平均光功率.

A DSP chip based high-speed data acquisition system is discussed at 155 Mb/s. According to the traits of burst optical signal in the passive optical network（PON）, this system includes analog signal receiver and digital signal processing. The burst signal receiver is composed by trans-impedance amplifier ADS015, the peak detector circuit, limiting amplifier MAX3761 and circuit of reset pulse, accomplished receiving and amplifying of burst signal. The burst signal processing module composed by high-speeding A/D converter AD9481 and DSP chip TMS320C6201 can accomplish converting burst signal from analog to digital and detecting transmitter burst signal average power in the active give out light duration.