Model-based phase velocity and attenuation estimation in wideband ultrasonic measurement systems
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
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.
Research subject Signal Processing; Industrial Electronics
IdentifiersURN: urn:nbn:se:ltu:diva-4251DOI: 10.1109/TUFFC.2007.219Local ID: 22b9cbc0-bc0d-11db-a46c-000ea68e967bOAI: oai:DiVA.org:ltu-4251DiVA: diva2:977115
Validerad; 2007; 20060905 (ysko)2016-09-292016-09-29Bibliographically approved