心音的时频分析使用窗和平滑窗Wigner-ville分布

Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-08-26 DOI:10.1109/ISSPA.2003.1224958

S. Daliman, A. Sha'ameri

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引用次数: 8

摘要

心音和杂音是时变信号，最好使用时频分析来分析。采用加窗Wigner-Ville分布(WWVD)和光滑加窗Wigner-Ville分布(SWWVD)得到信号的时频表示(TFR)。通过确定WWVD和SWWVD的参数设置，消除了交叉项，提高了TFR。TFR的精度取决于主瓣宽度和信干涉比。结果表明，使用SWWVD可以获得最精确的TFR。

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Time-frequency analysis of heart sounds using windowed and smooth windowed Wigner-ville distribution

Heart sounds and murmurs are time-varying signals that would best be analyzed using time-frequency analysis. Windowed Wigner-Ville distribution (WWVD) and smooth windowed Wigner-Ville distribution (SWWVD) are used to obtain the time-frequency representation (TFR) of the signal. Determination of parameter setting of WWVD and SWWVD eliminates the cross-terms and improve TFR. The accuracy of TFR is determined based on the mainlobe width and signal-to-interference ratio. It is found that the most accurate TFR can be achieved using SWWVD.

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Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.

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