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通信工程2019年12期

伪Wigner-Ville 分布在心电信号时频分析中的应用
谢斌,夏立新
(喀什大学 物理与电气工程学院,新疆 喀什 844006)

摘  要:心电信号(Electrocardio-signal,ECG)是一种非平稳性和非线性的微弱生物信号。在运用Wigner-Ville 分布处理心电信号时,会产生交叉项。本文通过伪Wigner-Ville 分布(PWVD)对心电信号的时频进行分析,讨论对交叉项的抑制和消除。本文使用计算机仿真软件,分别得到了正常和失常心电信号的伪Wigner-Ville 分布的平面时频分布图,并讨论了心电信号的能量分布变化。结果表明经过处理后的心电信号,信号能量的分布更加清晰、光滑,心电信号的杂波也有所减小。


关键词:心电信号;伪Wigner-Ville 分布;时频分析;交叉项



中图分类号:TN911.72         文献标识码:A         文章编号:2096-4706(2019)12-0056-03


Application of Pseudo Wigner-Ville Distribution in Time-Frequency Analysis ofECG Signals

XIE Bin,XIA Lixin

(School of Physics and Electrical Engineering,Kashgar University,Kashgar 844006,China)

Abstract:ECG(Electrocardio-signal) is a non-stationary and non-linear weak biological signal. When using Wigner-Villedistribution to process ECG signals,cross-terms will occur. In this paper,the suppression and elimination of cross-terms are discussedthrough time-frequency analysis of pseudo Wigner-Ville distribution(PWVD)for ECG signals. In this paper,the pseudo Wigner-Ville distribution of normal and abnormal ECG signals is obtained by computer simulation software,and the energy distribution ofECG signals is discussed. The results show that the distribution of signal energy is clearer and smoother,and the clutter of ECG signaldecreases after processing.

Keywords:ECG signal;pseudo Wigner-Ville distribution;time-frequency analysis;cross terms


课题项目:喀什大学校内青年专项课题:喀什地区人群心电信号的时频分析与研究(项目编号:(13)2486);喀什大学校级教改课题:小班制英汉双语教学的实践与研究——以《量子力学》课程为例(项目编号:KJDZ1701)。


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作者简介:谢斌(1986-),男,汉族,甘肃陇西人,教师,讲师,硕士研究生,研究方向:生物医学超声。