北京航空航天大学学报 ›› 2005, Vol. 31 ›› Issue (02): 157-161.

• 论文 • 上一篇    下一篇

基于训练序列的时域OFDM载波同步算法

杨晨阳, 洪慧勇   

  1. 北京航空航天大学 电子信息工程学院, 北京 100083
  • 收稿日期:2004-06-20 出版日期:2005-02-28 发布日期:2010-09-21
  • 作者简介:杨晨阳(1965-),女,浙江杭州人,教授,cyyang@buaa.edu.cn.
  • 基金资助:

    教育部高等学校优秀青年教师教学科研奖励计划基金资助项目

Training sequence based carrier frequency synchronization method for OFDM system

Yang Chenyang, Hong Huiyong   

  1. School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2004-06-20 Online:2005-02-28 Published:2010-09-21

摘要: 在研究单次频偏累积相偏估计的基础上,详细分析了2次独立的频偏累积相偏估计带来的频偏捕获范围的提高.并在此基础上提出一种基于训练序列的载波同步算法.这种算法利用时域2次独立的不同分辨力的相偏估计,解决了单次估计可能存在的相位模糊问题,从而实现了大频偏载波同步.通过理论分析给出了这种算法的性能,并通过仿真进行了验证.由于完全在时域进行估计,和其他大频偏载波同步算法相比,这种算法计算量小,且实现简单.

Abstract: Based on the study of single estimation of phase-offset induced by frequency offset, two independent phase-offset estimations which could expand the capture range of frequency offset was thoroughly analyzed, and a trainingsequence based carrier frequency synchronization method for orthogonal frequency division multiplexing(OFDM) system was proposed. The method take the advantage of two independent phase-offset estimations to remove the potential phase ambiguity existed in a phase-offset estimation, soas to recover the carrier frequency in a wide range. Theoretical analysis and simulation tests were provided to evaluate the performance of the method. Since the frequency offset is estimated in time domain, this method is easier to implement with much less complexity comparing with other wide range carrier frequency recovery methods.

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