Title :
Analysis method of nonstationary waveform based on modulation model
Author :
Takizawa, Yumi ; Fukasawa, Atsushi
Author_Institution :
Inst. of Stat. Math., Minist. of Educ., Tokyo, Japan
Abstract :
This paper describes a new analysis method for nonstationary signals from the viewpoint of a waveform based on a modulation model. In this model, an instantaneous phase angle is considered to consist of two kinds of time-dependent parameters. The first is a smoothly rotating component and the second is a rapidly variable component. These two parameters enable us to analyze precise variations of nonstationary waveforms. This analysis method is confirmed by numerical evaluations
Keywords :
modulation; signal processing; waveform analysis; analysis method; instantaneous phase angle; modulation model; nonstationary signals; nonstationary waveform; nonstationary waveforms; rapidly variable component; smoothly rotating component; time-dependent parameters; Approximation error; Band pass filters; Damping; Equations; Frequency; Mathematical model; Mathematics; Phase modulation; Research and development; Vocoders;
Conference_Titel :
TENCON '96. Proceedings., 1996 IEEE TENCON. Digital Signal Processing Applications
Conference_Location :
Perth, WA
Print_ISBN :
0-7803-3679-8
DOI :
10.1109/TENCON.1996.608416
