一种改进的OFDM系统定时同步算法  

An improved timing synchronization algorithm for OFDM

作　　者：郭俊卿[1] 陈云 胡俊[1] 

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]山东电信潍坊分公司,山东潍坊261041

出　　处：《电子设计工程》2011年第14期151-152,159,共3页Electronic Design Engineering

摘　　要：基于提高OFDM系统整体性能的目的,采用对称相关的性能,通过对Park和Minn等人的算法进行研究,并在其基础上进行了改进,改进算法消除了定时度量中的多余峰值,只有一个准确的峰值,可以很容易的进行时间定时。通过MATLAB进行仿真,结果表明,改进算法的性能比原算法有所改善,并且适用高斯信道和多径衰落信道。In this paper,a improved OFDM timing synchronization algorithm is proposed through comparison with Park and the Minn algorithm by using symmetrical correlation in order to achieve much better overall performance of OFDM system.The improved algorithm removes extra peaks in timing metric and only has one peak that makes determination of correct timing metric easier.Simulation results show that the improved algorithm has a smaller mean square error and is suitable for AWGN and multi-fading environment.

关 键 词：OFDM 定时同步 均方误差 多径衰落信道 

分 类 号：TN919[电子电信—通信与信息系统]