Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/10592
Title: On analysis of exponentially decaying pulse signals using stochastic volatility model
Authors: Chan, CM
Tang, SK 
Wong, H 
Issue Date: 2006
Source: Journal of the Acoustical Society of America, 2006, v. 119, no. 3, p. 1519-1526
Abstract: A stochastic volatility model incorporating the exponential power distributions is adopted in the present study to analyze exponentially decaying pulses in the presence of background noises of various magnitudes. The discussions are focused on its effectiveness in the determination of the instant of the pulse initiation and the decay constant. The results are compared with those obtained by the conventional short-time Fourier transform. It is found that the present stochastic volatility model can retrieve the instant of the pulse initiation and the decay constant within engineering tolerance even when the noise is slightly stronger that the pulse amplitude. Its performance is substantially better than that of the Fourier transform when the frequency of the decay pulse fluctuates.
Publisher: Acoustical Society of America
Journal: Journal of the Acoustical Society of America 
ISSN: 0001-4966
EISSN: 1520-8524
DOI: 10.1121/1.2168415
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