EDSL传输系统中MQAM信号解调的定时恢复  

Timing Recovery of MQAM Signal Demodulation in EDSL Transmission System

作　　者：杨霖[1] 李欣[1] 刘明[1] 

机构地区：[1]中国海洋大学信息科学与工程学院,青岛266100

出　　处：《中国新通信》2009年第9期33-36,共4页China New Telecommunications

摘　　要：EDSL技术是我国具有自主知识产权的第三代宽带接入技术,在其采用的MQAM信号调制方式中,全数字解调端的定时恢复是关键技术之一。本文论述了插值法定时恢复的基本原理,介绍了一种基于Gardner定时误差检测算法的定时恢复方法,并做出适当改进以适合EDSL传输系统,给出了仿真结果,验证了方案的可行性。Timing recovery is one of the key technologies in all-digital demodulator of MQAM signal in EDSL transmission system which China has independent intellectual property rights of third-generation broadband access technology. This paper discussed the basic principle of interpolation timing recovery, then introduced a timing recovery method based on Gardner timing-error detection algorithm and make appropriate improvements to fit EDSL transmission system. At last, this paper gave the simulation results to verify the feasibility of the method.

关 键 词：定时恢复 定时误差检测 全数字解调 

分 类 号：TN915.6[电子电信—通信与信息系统]