中国医学装备2012，Vol.9Issue(6)：1-4,4.
心音信号时频分析方法研究
Methods for Time-frequency analysis of heart sound
摘要
Abstract
Objective： To study a suitable method for time-frequency analysis of heart sound, which has good time-frequency resolution to display the features of different heart sounds and assists the diagnosis of heart diseases. Methods： Wigner-Ville distribution, short-time Fourier transform and S transform were used to analyze the heart sound after the pre-processing of heart sound. Results： Wigner-Ville distribution had good time-frequency clustering and high resolution, but it contained cross interference items; short-time Fourier transform had bad time-frequency clustering and low resolution; S transform had high time-frequency resolution and good time-frequency clustering. Conclusion： S transform can meet the requirements for the analysis of heart sound because of its Gaussian window, the width of which can change and high time-frequency resolution.关键词
心音信号/时频分辨率/时频分析Key words
Heart sound signal/Time-frequency resolution/Time-frequency analysis分类
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李战明,韩阳,韦哲..心音信号时频分析方法研究[J].中国医学装备,2012,9(6):1-4,4.基金项目
甘肃省科技支撑计划（090NKCA092）“虚拟动态心音信号检测与分析系统” （）
