Parametric modeling with beamspread compensation and MIMO frequency domaininversion applied to fine saturated sands

Citation
S. Vandenplas et al., Parametric modeling with beamspread compensation and MIMO frequency domaininversion applied to fine saturated sands, IEEE ULTRAS, 48(4), 2001, pp. 985-997
Citations number
27
Categorie Soggetti
Optics & Acoustics
Journal title
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
ISSN journal
08853010 → ACNP
Volume
48
Issue
4
Year of publication
2001
Pages
985 - 997
Database
ISI
SICI code
0885-3010(200107)48:4<985:PMWBCA>2.0.ZU;2-G
Abstract
A system identification technique is applied to estimate the intrinsic abso rption and dispersion of two fine sands. The method is based on the paramet ric modeling of the wave propagation through a Plexiglas tank filled with t he sediment under investigation. The applicability of various porous models is discussed. The viscoelastic constant Q model and viscoelastic rational form model are applied and compared. Closed form expressions describing the wave propagation are replaced by Debye series expansions with correction c oefficients that consider the beamspread caused by the finite aperture of t he emitter. A multiple input multiple output (MIMO) representation is used in conjunction with the maximum likelihood estimator (MLE) for the estimati on of the sediment parameters. The estimated absorption and dispersion curv es are depicted.