基于FPGA的简易数字信号传输性能分析系统

摘要

基于FPGA产生伪随机信号和曼彻斯特编码,以MSP430为基本功能控制单元,通过三路低通滤波器和伪随机信号信道噪声来模拟传输信道,设计了一个以数字信号发生器,模拟传输信道和数字分析电路为核心的简易数字信号传输性能分析系统,实现了数字信号传输特性测试。测试表明系统工作稳定,输入信号动态范围大,眼图清晰,达到了设计要求。%This design that is mainly controlled by MSP430 is a simply-constructed digital transmission performance analyzer with an interactive interface containing a digital signal producer, an analog transmission channel and a digital analyzer as its core. The design produces random binary sequences and Manchester codes on the basis of FPGA and uses three low pass filters to simulate the transmission channels while adding high frequency noise to the signal. The test of this design shows that the system, with a large dynamic range,can work stably,and the eye diagram is clear.