数字复用设备的抖动分析

Jitter Analysis of Digital Multiplex Equipment

本文对数字复用设备的抖动特性进行了分析。在分析中,考虑到码速调整参数、复用帧结构、相位比较器的形式、脉冲塞入控制方式及缓存器容量等因素。建立了通用的理论模型,导出了其抖动波形的一般表达式。通过数学分析,得到了抖动的频谱特性,并进行了试验验征。所得到理论分析结果具有更普遍的意义。

The jitter characteristics of digital multiplexers were being analyzed by considering the bit rate adjusting parameters, multiplex frame structure, phase comparater type, pulse stuffing control methods and buffer storage capacity etc. Universal theoretical model has been established, and the general expression has been derived. Based on the mathematical analysis, the jitter spectrum are obtained and experimentally verified. The results of theoretical analysis are more applicable.