ATM电路仿真设备中自适应时钟恢复算法的设计与实现

Design and Implementation of Adaptive Clock Recovery Algorithm in ATM CES Equipment

ATM技术很好地解决了数据的透明传送问题,但定时信息在ATM网中的传递透明性由于统计复用而受到损害,而时钟同步是电路仿真业务的关键问题。文中介绍了自适应时钟恢复算法的背景,原理及其具体设计方案,提出了一种基于状态机的算法,对时钟捕捉的精确度作了理论分析,并给出来部分实验结果。

ATM supports transparent data transport,which brings distortion of timing information,while clock synchro-nization is the key point of ATM CES.This paper introduces the backgrounds of adaptive clock recovery algorithm,as well as its principle and detailed design,brings forward an implementation of the algorithm based on state machine,pro-vides theoretical analysis on the accuracy of the catched clock,and provides some experimental result.