上海交通大学学报

上海交通大学学报（自然版）

• 无线电电子学、电信技术 • 上一篇    下一篇

正交频分复用系统中一种新的时频同步方案

郭漪，刘刚，葛建华，张武军   

  1. (西安电子科技大学 综合业务网国家重点实验室， 西安 710071)
  • 收稿日期:2007-08-29 修回日期:1900-01-01 出版日期:2008-10-28 发布日期:2008-10-28
  • 通讯作者: 郭漪

A Novel Time and Frequency Synchronization Scheme for
Orthogonal Frequency Division Multiplexing Systems

GUO Yi, LIU Gang, GE Jian-hua, ZHANG Wu-jun   

  1. (National Key Laboratory of Integrated Service Networks, Xidian University, Xi’an 710071, China)
  • Received:2007-08-29 Revised:1900-01-01 Online:2008-10-28 Published:2008-10-28
  • Contact: GUO Yi

摘要： 提出了一种新的时频同步方案.该方案基于一种新的训练符号，首先利用该训练符号在时域的共轭对称性完成定时同步，然后利用其频域良好的自相关性完成频率同步.仿真结果表明，与已有方案相比，新方案不仅具有更好的定时和频率偏移估计性能，而且频偏估计范围较大.

关键词: 正交频分复用, 训练符号, 定时同步, 频率同步

Abstract: A new training symbol was designed and a novel time and frequency synchronization scheme for orthogonal frequency division multiplexing systems was proposed. The time synchronization was accomplished by using the symmetric conjugate of the training symbol in time domain and the frequency synchronization was finished by utilizing the good autocorrelation of the training symbol in frequency domain. The simulation results show that the scheme gives very accurate estimates of symbol timing and carrier frequency offset and provides a very wide acquisition range for the carrier frequency offset.

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