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 |
