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Model-based phase velocity and attenuation estimation in wideband ultrasonic measurement systems
LuleƄ University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.ORCID iD: 0000-0002-6216-6132
2007 (English)In: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, ISSN 0885-3010, E-ISSN 1525-8955, Vol. 54, no 1, 138-146 p.Article in journal (Refereed) Published
Abstract [en]

A parametric method to estimate frequencydependent phase velocity and attenuation is presented in this paper. The parametric method is compared with standard nonparametric Fourier analysis techniques using numerical simulations as well as real pulse-echo experiments. Approximate standard deviations are derived for bothmethods and validated with numerical simulations. Compared to standard Fourier analysis, the parametric model gives considerably lower variance when estimating attenuation and phase velocity. In contrast to nonparametric techniques, the proposed estimator avoids the phase unwrapping problem because analytical expressions for thecontinuous phase velocity and attenuation can be derived.

Place, publisher, year, edition, pages
2007. Vol. 54, no 1, 138-146 p.
National Category
Signal Processing Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Signal Processing; Industrial Electronics
Identifiers
URN: urn:nbn:se:ltu:diva-4251DOI: 10.1109/TUFFC.2007.219Local ID: 22b9cbc0-bc0d-11db-a46c-000ea68e967bOAI: oai:DiVA.org:ltu-4251DiVA: diva2:977115
Note
Validerad; 2007; 20060905 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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