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An Accurate Modulation Recognition Method of QPSK Signal

机译:QPSK信号的精确调制识别方法

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摘要

Quadrature phase shift keying (QPSK) modulation has been widely applied in communication systems. With the increasing development of QPSK modulation recognition, it is meaningful for ensuring validity and accuracy of recognition method. Therefore, the method of signal recognition has been presented based on the features of QPSK modulated signal, in which the feature parameters of QPSK signal are extracted. Besides, signal classification is fulfilled through thresholds, and modulation recognition is completed with quartic spectrum. The simulation results show that, the method can recognize QPSK modulation effectively in less sample space condition and can be more accurate.
机译:正交相移键控(QPSK)调制已广泛应用于通信系统中。随着QPSK调制识别技术的不断发展,对于保证识别方法的有效性和准确性具有重要意义。因此,提出了一种基于QPSK调制信号特征的信号识别方法,该方法提取了QPSK信号的特征参数。此外,通过阈值实现信号分类,并通过四次频谱完成调制识别。仿真结果表明,该方法可以在较少的样本空间条件下有效识别QPSK调制,并且精度更高。

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  • 来源
    《Mathematical Problems in Engineering》 |2015年第19期|516081.1-516081.7|共7页
  • 作者单位

    Shenyang Ligong Univ, Sch Informat Sci & Engn, Shenyang 110159, Peoples R China.;

    Shenyang Ligong Univ, Sch Informat Sci & Engn, Shenyang 110159, Peoples R China.;

    Shenyang Ligong Univ, Sch Informat Sci & Engn, Shenyang 110159, Peoples R China.;

    Shenyang Ligong Univ, Sch Informat Sci & Engn, Shenyang 110159, Peoples R China.;

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