网络传输后信号再生和相位同步的设计  

Design of Analog Signal Regeneration and Phase Synchronization after Network Transmission

作　　者：刘星宇 张翠翠[1,2] 张鹏辉[1,2] 杨锦程 李啸 LIU Xingyu;ZHANG Cuicui;ZHANG Penghui;YANG Jincheng;LI Xiao(School of Information and Communications Engineering,Xi’an Jiaotong University,Xi’an 710049,China;National Simulation Education Center for Communications and Information Systems,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学信息与通信工程学院,西安710049 [2]西安交通大学通信与信息系统国家级虚拟仿真实验教学中心,西安710049

出　　处：《实验室研究与探索》2020年第12期71-76,共6页Research and Exploration In Laboratory

基　　金：国家自然科学基金面上项目(6197010800);西安交通大学本科实践教学改革研究专项项目(18XJZX15)。

摘　　要：针对FPGA的信号采集和经网络传输后的信号再生与相位同步问题,采用自适应存储策略,节省存储空间和网络传输带宽,同时扩宽了可处理的信号频率范围;采用交织传输策略,降低了因网络丢包导致的波形数据失真度;最后对系统进行了实际搭建和验证,对实测结果进行了分析,包括误差的产生来源和计算方法,并采用校准拟合的方式降低了信号同步误差。最终无失真地传输和再生了8位数据带宽,10 MB采样时钟的两路0.2 Hz到2 MHz的方波、正弦波、三角波信号,且收发信号相位同步误差在3μs以内。For the E-question of"2019 National Undergraduate Electronics Design Contest",the issues related to"FPGA-based signal acquisition,regeneration and phase synchronization after transmission through the Internet"were studied.We adopt adaptive storage strategy to economize memory space and network bandwidth,broaden the effective frequency band,optimize the distortion of waveform data caused by network packet loss by using byte interleaver;and build and verifythe system in the end.According to the measured results,we make a careful analysis of error sources and theoretical calculation.In addition,calibration curve fitting is plotted by the measured data in order to balance the signal synchronization error.The apparatus can transmit two-way 8-bit width and 10 M sampling clock AC signal,ranging from 0.2 Hz to 2 MHz,and reproduce it without visible distortion which includes sin,square and triangle wave.Eventually,the phase synchronization gap between the transmitter and receiver is squeezed to 3μs.

关 键 词：FPGA 千兆以太网 自适应存储 交织传输设计 相位同步 

分 类 号：TN919.3[电子电信—通信与信息系统]