An improved training sequence-based symbol synchronization method in OFDM systems

Zheng Xiaozhen; Meng Yanhua

doi:10.13756/j.gtxyj.2013.01.011

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An improved training sequence-based symbol synchronization method in OFDM systems

- An improved training sequence-based symbol synchronization method in OFDM systems
- Study on Optical communication Issue 1, Pages: 11-13(2013)
- 作者机构：
  
  河南工业大学电气工程学院
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2013.01.011
  CLC： TN919.3
- Published：2013，
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[1]郑小真,孟艳花.基于训练序列的OFDM系统符号同步改进方法[J].光通信研究,2013(01):11-13+16.

Zheng Xiaozhen, Meng Yanhua. An improved training sequence-based symbol synchronization method in OFDM systems. [J]. (1):11-13(2013)
[1]郑小真,孟艳花.基于训练序列的OFDM系统符号同步改进方法[J].光通信研究,2013(01):11-13+16. DOI： 10.13756/j.gtxyj.2013.01.011.

Zheng Xiaozhen, Meng Yanhua. An improved training sequence-based symbol synchronization method in OFDM systems. [J]. (1):11-13(2013) DOI： 10.13756/j.gtxyj.2013.01.011.

摘要

符号同步偏差严重影响了OFDM（正交频分复用）系统的性能。针对S&C方法存在的测度平顶和Minn方法出现的副峰

提出了一种新的符号同步方法。该方法在Minn方法的基础上

通过设计新的定时测度计算方法

在消除定时测度平顶的同时

还避免了定时测度曲线副峰的出现。仿真结果表明

该方法的定时测度曲线为单一峰值

在低信噪比及多径衰落环境下具有更低的均方误差。

Abstract

Symbol synchronization offset seriously affects the performances of OFDM systems.In view of the existence of metric plateau when the S&C method is used and of redundant peaks when the Minn method is used

a new symbol synchronization method is proposed in this paper.This new timing metric calculation method is designed on the basis of the Minn method

which eliminates the timing metric plateau and avoids that of redundant peaks in the timing metric curve.Simulation results show that when this method is used

the timing metric curve has only one peak and has even smaller Mean Square Error（MSE） in low SNR and multi-path fading environment.

关键词

正交频分复用符号同步训练序列多径衰落均方误差

Keywords

OFDMsymbol synchronizationtraining sequencemulti-path fadingMSE

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