利用训练帧进行OFDM系统同步的新算法  

A new synchronization algorithm for OFDM systems using training frame

作　　者：周一青[1] 胡爱群[1] 

机构地区：[1]东南大学无线电工程系,江苏南京210018

出　　处：《通信学报》2001年第4期13-18,共6页Journal on Communications

摘　　要：本文主要讨论了OFDM系统的定时和频率偏差估计算法 ,针对现有的ML(最大似然 )算法定时不够精确、频偏估计范围过小的缺点 ,提出了一种新算法。该算法利用OFDM训练帧进行定时估计和频偏捕获 ,结合ML算法进行频率估计。仿真结果说明 ,新算法克服了ML算法的缺点 。This paper is about the synchronization algorithms of OFDM systems First,the ML (maximum likelihood)algorithm is introduced,and its drawbacks are analyzed A new method is presented in this paper which uses a training frame to estimate the timing and frequency deviation jointly The result of computer simulation has showed that the new joint algorithm can overcome the drawbacks of ML algorithm and get better synchronization

关 键 词：OFDM系统 同步 联合算法 ML算法 训练帧 多载波系统 

分 类 号：TN919.34[电子电信—通信与信息系统]