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Title Transcription
レンゾク ウェーブレット ヘンカン ニヨル スペクトル カイセキ
Title Alternative (English)
Spectrum analysis by continuous wavelet transform
File
language
jpn
Author
Description
Continuous wavelet transform can localize time and frequency components of signal. The quantity of the wavelet transform corresponds to the amplitude of the component, but it is seldom used for the measurement of amplitude. In this paper, the calculation procedure of continuous wavelet transform of time series using fast Fourier transform algorithm is explained, and the scale parameter of wavelet transform is converted into period and frequency. The wavelet transforms of sinusoidal and chirp signals show that the resolution of wavelet transform decreases when the period or the frequency of signal increases, and the quantity of wavelet transforms of constant amplitude signals vary with period and frequency. Then, correction coefficient and logarithmic scaling of the scale parameter are introduced. Using these factors, the wavelet transform whose resolution and quantity are almost constant is obtained.
Journal Title
島根大学総合理工学部紀要. シリーズA
Volume
44
Start Page
17
End Page
22
ISSN
13427113
Published Date
2010-12-22
NCID
AA11157087
Publisher
島根大学総合理工学部
Publisher Aalternative
Interdisciplinary Faculty of Science and Engineering, Shimane University
NII Type
Departmental Bulletin Paper
OAI-PMH Set
Interdisciplinary Graduate School of Science and Engineering
Remark
30-41+ / 1997-2007
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