シミュレーションによる生体信号へのウェーブレット変換適用方法の検討

概要

論文の詳細を見る
This report presents the results of an examination of a method of applying wavelet transformation, a time-frequency analysis technique, to the evaluation of biological signals. The presumed accuracy of the power spectral deusity function obtained from the wavelet transformation against the change of the signal's frequency information in time is examined by simulation. As data for analysis, a sine curve wave form is used; either frequency or amplitude, or both, are changed between the former and latter halves of the waveform. By analyzing this waveform, the power theoretically expected and the value actually obtained from the wavelet transformation are compared. The examination revealed that the presumed accuracy is low when frequency changes slightly, and the sampling rate of the signal has little influence on the spectrum presumed accuracy