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计算机工程 ›› 2010, Vol. 36 ›› Issue (4): 262-264. doi: 10.3969/j.issn.1000-3428.2010.04.092

• 开发研究与设计技术 • 上一篇    下一篇

OFDM信号的盲识别研究

张 弛,吴 瑛   

  1. (信息工程大学信息工程学院,郑州 450002)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-02-20 发布日期:2010-02-20

Research on Blind Identification for OFDM Signal

ZHANG Chi, WU Ying   

  1. (Institute of Information Engineering, Information Engineering University, Zhengzhou 450002)
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-02-20 Published:2010-02-20

摘要: 提出一种新的OFDM信号盲识别算法,利用多载波OFDM信号在时域上的近高斯性,提取信号特征参数Q作为分类特征,该参数不受高斯白噪声的影响,且无须知道先验知识,只需在中频直接对信号进行识别,计算简单、利于实现。仿真实验结果表明,在短波信道中,该算法具有较强的抗多径能力。

关键词: 调制识别, 短波信道, OFDM信号, 特征参数

Abstract: A new algorithm for the identification of Orthogonal Frequency Division Multiplexing(OFDM) signal is proposed. The feature parameter Q is used to discriminate OFDM signal because of their asymptotically Gaussian. This feature parameter which is easy to compute and operate can suppress the Gaussian white noise. The algorithm directly processes bandpass signals without the any prior information. Simulation experimental results show this algorithm is immune to multi-path channel in shortwave channel.

Key words: modulation recognition, shortwave channel, Orthogonal Frequency Division Multiplexing(OFDM) signal, feature parameter

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