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
出处
《通信学报》
EI
CSCD
北大核心
2001年第4期13-18,共6页
Journal on Communications
关键词
OFDM系统
同步
联合算法
ML算法
训练帧
多载波系统
OFDM systems
synchronization
timing and frequency deviation estimation
joint algorithm
ML algorithm
