On analysis of exponentially decaying pulse signals using stochastic volatility model. Part II: Student- t distribution

C. M. Chan, Shiu Keung Tang

Research output: Journal article publicationJournal articleAcademic researchpeer-review


The authors have recently demonstrated how the stochastic volatility model incorporating the exponential power distribution can be used to retrieve the instant of initiation of an exponentially decaying pulse and its decay constants in the presence of background noises. In the present study, the Student- t distribution, which can be expressed in a two-stage scale mixtures representation, is adopted in the stochastic volatility model. It is found that the corresponding performance is comparable to that for the case of the exponential power distribution when the signal-to-noise ratio is larger than or equal to 3 dB. The performance deteriorates quickly when the signal-to-noise ratio drops below 0 dB.
Original languageEnglish
Pages (from-to)1783-1786
Number of pages4
JournalJournal of the Acoustical Society of America
Issue number4
Publication statusPublished - 16 Oct 2006

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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