Narrowband acoustic doppler volume backscattering signal-part II: spectral centroid estimation

Document type: Journal Articles
Article type: Original article
Peer reviewed: Yes
Author(s): Xiao-Jiao Tao, Ingvar Claesson, Nedelko Grbic
Title: Narrowband acoustic doppler volume backscattering signal-part II: spectral centroid estimation
Journal: IEEE Transaction on Signal Processing
Year: 2002
Volume: 50
Issue: 10
Pagination: 2656-2660
ISSN: 1053-587X
Publisher: IEEE
URI/DOI: 10.1109/TSP.2002.804072
ISI number: 000178713200004
Organization: Blekinge Institute of Technology
Department: Department of Telecommunications and Signal Processing (Institutionen för telekommunikation och signalbehandling)
Department of Telecommunications and Signal Processing S-372 25 Ronneby
+46 455 38 50 00
Authors e-mail: xjtao@agere.com, icl@bth.se, ngr@bth.se
Language: English
Abstract: This paper proposes a novel algorithm to estimate the time-varying spectral centroid of the narrowband Doppler
volume backscattering signal. It is constructed in a semi-parametric
way, that is, modeling parametrically the local narrowband
evolutionary spectrum using an AR(2) and nonparametrically
adapting its time-varying coefficients using the wavelet shrinkage.
The improved performance is gained by the underlying linear prediction function of the AR(2) and the minimax optimality of the unknown smoothness adaptation of the wavelet shrinkage
procedure.
Subject: Signal Processing\Detection and Classification
Signal Processing\Hydro-Acoustics
Keywords: Acoustic Doppler effect, finite duration signal
Edit