English

应用科学学报 ›› 2012, Vol. 30 ›› Issue (2): 128-134.doi: 10.3969/j.issn.0255-8297.2012.02.004

• 论文 • 上一篇    下一篇

ZPOFDM循环平稳性分析及在多载波信号识别中的应用

崔伟亮， 江桦， 李剑强   

  1. 解放军信息工程大学信息工程学院，郑州450002  
  • 收稿日期:2010-12-26 修回日期:2011-05-19 出版日期:2012-03-26 发布日期:2012-03-30
  • 通信作者: 崔伟亮，博士，研究方向：调制识别、循环平稳分析，E-mail：cwliang2006@yahoo.com.cn；
  • 作者简介:崔伟亮，博士，研究方向：调制识别、循环平稳分析，E-mail：cwliang2006@yahoo.com.cn；江桦，教授，博导，研究方向：通信信号处理等，E-mail: double36@126.com
  • 基金资助:

    “十一·五”国家重点项目基金(No.2009AA011504)资助

Cyclostationarity Analysis of ZPOFDM Signals and Its Application to Classification of Multicarrier Modulation Signals

CUI Wei-liang, JIANG Hua, LI Jian-qiang   

  1. Institute of Information Engineering, PLA Information Engineering University; Zhengzhou 450002, China
  • Received:2010-12-26 Revised:2011-05-19 Online:2012-03-26 Published:2012-03-30

PDF

1340

被引次数

5

摘要：

针对多载波调制分类算法无法识别零前缀正交频分复用(zero-padding OFDM, ZPOFDM)信号的问题，提出了一种改进的OFDM信号识别方法. 利用ZPOFDM等信号的二阶循环累积量特征，结合循环平稳性检测，实现衰落信道下包括ZPOFDM、循环前缀正交频分复用(cyclic-prefix OFDM CPOFDM)、单载波等信号的分类.理论分析与实验结果表明，该方法在没有同步及参数估计等预处理条件下能实现频率选择性衰落信道下多载波信号的有效区分.

关键词: 调制识别, 零前缀正交频分复用, 衰落信道, 循环平稳性分析, 循环平稳性检测

Abstract:

 An improved OFDM signal recognition algorithm is proposed to distinguish the zero-padding OFDM (ZPOFDM) signal from multicarrier signals. Based on the second-order cyclic cumulant of ZPOFDM and other signals and combined with a cyclostationary test, the algorithm can classify signals such as ZPOFDM, cyclic-prefix OFDM (CPOFDM), and single carrier signals in fading channel. The theoretical analysis and simulations confirm the effectiveness of discriminating multicarrier signals in frequency selective channels without synchronization and parameters estimation.

Key words: modulation classification, ZPOFDM (zero-padding OFDM), fading channel, cyclostationarity analysis, cyclostationary test

中图分类号: