基于时频分布的信号相位跳变检测与估计方法

The Detection and Estimation of Phase Discontinuity Using Time-Frequency Distribution

本文提出了利用时频分布的信号相位跳变检测方法,对由相位跳变而引起的时频分布峰值的变化规律进行了讨论。分析表明信号时频表示的幅度能够直观地反映出其相位的变化,因此通过对时频分布峰值特征的检测可以准确定位频率跳变时刻,并能够定量的了解这些参数的变化,从而为信号的相位调制类型识别提供帮助。相应的仿真实验证明了这一分析结论。

This paper introduces the method of detecting discontinuity of phase in signal using time-frequency representation, and discusses the magnitude variation of time-frequency distribution caused by the jump of phase. The analysis shows that the magnitude of time-frequency distribution is closely related with the structure of phase of the signal. So, by the detection of the characteristic magnitude, the discontinuities can be accurately located, and their values can also be estimated. Finally the corresponding simulations are provided.