基于FPGA的数字信号传输性能分析仪  

The Digital Signal Transmission Performance Analyzer Based on FPGA

作　　者：卢超[1] 朱继瑜 郝鹏程 张成杰 

机构地区：[1]陕西理工学院物理与电信工程学院,陕西汉中723000 [2]陕西省汉中中学,陕西汉中723000

出　　处：《电子器件》2013年第6期837-841,共5页Chinese Journal of Electron Devices

基　　金：陕西省教育厅专项科研项目(2013JK1060)

摘　　要：采用FPGA设计了一种数字信号传输性能分析仪,可实现波特率步进为10 kbit/s的m序列发生器与曼彻斯特编码分别作为测试仪的测试信号,同时可以产生波特率为100 kbit/s的伪随机序列的噪声信号。将信号通过不同截止频率的滤波器构建出不同传输信道环境,信号通过该信道后在示波器上同步出信号的眼图,通过测量眼图的幅度来分析不同信道环境对信号传输的信号完整性及码间串扰的影响,以判断该该信道是否符合信号的传输要求,该分析仪采用TFT触摸屏,操作方便、显示清晰、人机交互性好。A kind of digital signal transmission performance analyzer is designed using FPGA. The system can realize the baud rate step M 10 kbit/s sequence generator and Manchester code respectively as the test signal tester,at the same time it can generate pseudo random sequences noise signal（baud rate is 100 kbit/s）. The system can synchronize signal eye pattern through the channel presented on the oscilloscope which is constructed by different cut-off frequency of the filter. By measuring eye amplitude to analyze the impact of different channels signal integrity on signal transmission and effect of ISI,it can determine whether the channel with signal transmission. The analyzer adopts TFr touch screen,has the characteristics of convenient operation,clear display ,nice human-computer interaction.

关 键 词：FPGA 数字信号 TFT 触摸屏 眼图 信号完整性 

分 类 号：TH89[机械工程—仪器科学与技术]