计算机应用 ›› 2012, Vol. 32 ›› Issue (08): 2119-2122.DOI: 10.3724/SP.J.1087.2012.02119

• 网络与通信 • 上一篇    下一篇

基于循环谱包络的多信号调制识别

余志斌1,于宁宇2   

  1. 1. 西南交通大学 电气工程学院,成都 610031
    2. 第二炮兵工程学院 101教研室,西安 710025
  • 收稿日期:2012-02-13 修回日期:2012-04-01 发布日期:2012-08-28 出版日期:2012-08-01
  • 通讯作者: 余志斌
  • 作者简介:余志斌(1976-),男, 湖南长沙人, 讲师, 博士, 主要研究方向: 信号与信息处理、模式识别;
    于宁宇(1983-), 男, 河南中州人, 博士研究生,主要研究方向: 信号处理。
  • 基金资助:
    国家自然科学基金资助项目(60971103);中央高校基本科研业务费专项基金资助项目(SWJTU11BR026)

Modulation recognition for multi-component PSK signals based on cyclic spectrum amplitude

YU Zhi-bin1,YU Ning-yu2   

  1. 1. School of Electrical Engineering, Southwest Jiaotong University, Chengdu Sichuan 610031, China
    2. 101 Section, Second Artillery Engineering College, Xi'an Shaanxi 710025, China
  • Received:2012-02-13 Revised:2012-04-01 Online:2012-08-28 Published:2012-08-01
  • Contact: YU Zhi-bin

摘要: 针对单通道接收机在多信号环境下难以处理信号调制识别的问题,提出一种不经信号分离直接提取各独立分量信号特征以有效识别多个相移键控(PSK)信号的新方法。该方法从理论上推导了时频重叠多分量信号在循环频率轴上的可分性,在此基础上提出了信号调制特征的提取方法和易于工程实现的信号识别方法。理论分析和仿真实验表明:该方法能不受干扰地提取各分量信号的调制特征,并能有效识别调制集内任意组合的双相移键控信号,当信噪比(SNR)为0dB时,各信号组合的平均正确识别率能达到97%。

关键词: 信号处理, 循环平稳, 特征, 相移键控, 调制识别

Abstract: Concerning the modulation recognition problem of the single-channel receiver working under the multi-signal environment, a new approach which can directly extract the feature of each independent component was proposed to identify multi-component Phase Shift Keying (PSK) signals. In this method, the spectral correlation function of the multi-component signal was deduced, features of signals were extracted and the classifier was designed. The theoretic analysis and experimental results show that the proposed algorithm can extract the feature of each independent component under the mutual interference of component signals, it can effectively classify arbitrary combinations of dual-signals in the given set, and the average correct recognition rate of all combinations reaches 97% when Signal-to-Noise Rate (SNR) is 0dB.

Key words: signal processing, cyclostationary, feature, phase shift keying, modulation recognition

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