| 心音信号的时频分析 |
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| 引用本文： | 王衍文 王海滨 程敬之. 心音信号的时频分析[J]. 生物医学工程学杂志, 1998, 15(1): 41-46 |
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| 作者姓名： | 王衍文 王海滨 程敬之 |
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| 作者单位： | 西安交通大学生物医学工程与仪器系!西安710049 |
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| 摘 要： | 对比研究了几种时频分析方法(WVD、CWD、CKD)及其在心音信号时频分析方面的特征和差异，并分别对正常和病态的一个心动周期的心音时频特征进行了研究，结果显示时频分析方法对心音这种非平稳信号，有较高的时频分辨率，这对于揭示心音产生的生理机制有着积极的作用，在理论研究和临床诊断中有一定的实用价植。
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| 关 键 词： | 心音信号 时频分析 信号处理 Wigner-Ville分布 |
The time-frequency analysis of the heart sound] |
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| Y Wang,H Wang,J Cheng. The time-frequency analysis of the heart sound][J]. Journal of biomedical engineering, 1998, 15(1): 41-46 |
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| Authors: | Y Wang H Wang J Cheng |
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| Affiliation: | Department of BME, Xian Jiaotong University, Xi'an 710049. |
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| Abstract: | The Wigner-Ville distribution, the Choi-Williams distribution, and cone-kernel distribution are three time-frequency distributions. We compared the interference attenuation and time-frequency concentration properties of the three TFDs. The properties were then further investigated by studying the results obtained for a chirp signal. We analysed the heart sounds, nonstationary signals, with the three TFDs. The results indicate that the time-frequency signal analysis methods have high time-frequency resolution. The time-frequency signal analysis techniques may be helpful in unveiling the complex mechanisms of heart sound generation and be used in medical research and clinical diagnosis. |
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