光通信系统的定时抖动

Timing Jitter in Optical Communication Systems

本文主要研究高速数字光通信系统中的定时抖动的问题。由时变谱法概念,给出了在任意的提取方式(BPF或PLL等)及非线性电路(NLC)条件下,诸抖动功率谱的一般表达式。并在简单定时提取电路(STC)的具体情况下与其它推导方式的结论进行了分析比较。为分析比较各个抖动源在具体电路中的影响,合理使用具体的NLC形式提供了方便。

This paper deals with the timing jitter in high speed optical fiber digital communication systems. From the concept of time-varying spectrum, a group general expressions of the jitter spectral densities are proposed, which are applicable to conditions of both arbitrary timing extraction (BPF or PLL, etc.) and arbitrary non-linear circuit (NLC). Their specific results in the simple timing extraction circuit(STC) condition are compared with those from other deductive methods. It proviues convenience for both comparing the effect of every jitter source in specific circuits and choosing appropriate NLC forms.