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

Author

Daliman, S. ; Ameri, Ahmad Zuri Sha

Author_Institution

Fac. of Electr. Eng., Universiti Teknologi Malaysia, Johor, Malaysia

Volume

2

fYear

2003

fDate

2003

Firstpage

625

Abstract

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.

Keywords

Wigner distribution; audio signal processing; cardiology; interference (signal); medical signal processing; smoothing methods; time-frequency analysis; heart sounds; mainlobe width; signal-to-interference ratio; smooth windowed Wigner-ville distribution; time-frequency analysis; time-frequency representation; time-varying signals; Auditory system; Chirp; Digital signal processing; Heart; Interference; Kernel; Signal analysis; Signal processing; Signal resolution; Time frequency analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

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

Conference_Location

Paris, France

Print_ISBN

0-7803-7946-2

Type

conf

DOI

10.1109/ISSPA.2003.1224958

Filename

1224958