基于训练序列的OFDM系统定时同步算法分析  

Algorithm analysis of timing synchronization for OFDM system based on training sequences

作　　者：张晓君[1] 于东海[1] 张圣清[1] 邹采荣[1] 

机构地区：[1]东南大学毫米波国家重点实验室信息处理与应用工程研究中心,南京210096

出　　处：《信息技术》2006年第2期24-27,共4页Information Technology

摘　　要：分析了OFDM系统符号定时偏差所造成的影响,比较了两种典型的基于训练序列的定时同步算法。对利用定时函数呈现峰值进行检测的算法给出了检测步骤,并做了仿真。仿真结果表明,在其定时函数处于低信噪比的条件下,基于训练序列的同步算法能够实现精确同步,同时也具有抗多径效应和抗窄带干扰的能力。In this paper the effect of symbol timing offset is analyzed, and two typical algorithms of symbol coarse synchronization for OFDM are compared based on training sequences. The detection steps of the algorithm of symbol synchronization based on the peak of correlation metric are discussed. The results of computer simulation show that the algorithm based on training sequences can get better synchronization in particular in the channel of strong interference and in the case of low SNR.

关 键 词：OFDM系统 训练序列 粗定时同步 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]