J4 ›› 2010, Vol. 37 ›› Issue (1): 169-173.doi: 10.3969/j.issn.1001-2400.2010.01.030

• 研究论文 • 上一篇    下一篇

含导频的OFDM信号的周期平稳特性分析

郭里婷   

  1. (福州大学 物理与信息工程学院,福建 福州  350002)
  • 收稿日期:2008-10-13 出版日期:2010-02-20 发布日期:2010-03-29
  • 通讯作者: 郭里婷
  • 作者简介:郭里婷(1976-),女,福州大学副教授,博士,E-mail: guoliting@fzu.edu.cn.
  • 基金资助:

    福建省自然科学基金资助项目(2009J05144);福建省教育厅科技项目资助项目(JB06063);福州大学人才基金资助项目(XRC-0641)

Research on the cyclostationarity of OFDM signals embedded pilots

GUO Li-ting   

  1. (College of Physics and Information Eng., Fuzhou Univ., Fuzhou  350002, China)
  • Received:2008-10-13 Online:2010-02-20 Published:2010-03-29
  • Contact: GUO Li-ting

摘要:

基于无线移动衰落信道下的正交频分复用系统传输模型和信号周期平稳特性理论,研究了含有导频的正交频分复用系统接收序列的周期平稳特性,并计算接收序列的周期自相关函数,为基于周期平稳特性的信号处理算法提供理论支持.理论分析和仿真结果显示,在无线衰落信道环境下,当对接收信号进行单倍于系统样点速率采样时,可以获得具有周期平稳特性的接收序列,其循环周期为此时的正交频分复用符号长度.

关键词: 导频, OFDM信号, 周期平稳特性, 无线移动信道

Abstract:

The cyclostationarity property of the OFDM signal embedded pilots is examined based on the theory of cyclostationarity. The final conclusion of this paper can be used as the basis of the cyclostationarity-based blind algorithms. Mathematical deduction and simulation results both show that if the received signal embedded pilots are sampled at the data rate, a cyclostationary sequence can be obtained. And the cyclic period of the sequence equals the length of the OFDM symbol.

Key words: pilot, orthogonal frequency division multiplexing, cyclostationarity, wireless communication channel