Subband adaptive filtering with time-varying nonuniform filter banks

Author

McCloud, Michael L. ; Etter, Delores M.

Author_Institution

Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO, USA

Volume

3

fYear

1997

fDate

21-24 Apr 1997

Firstpage

1953

Abstract

A technique is presented for subband adaptive filtering with nonuniform filter banks. The bandwidth allocations of the subband analysis and synthesis filters are adapted to the spectral characteristics of the input data in such a manner as to minimize an objective function built from the subband error powers. The nonuniform filter bank structure allows for fast convergence times for high order systems with a reduced mean square error relative to the uniform subband scheme. Results are presented for the case of a nonstationary system with time-varying spectral characteristics

Keywords

adaptive filters; band-pass filters; convergence of numerical methods; filtering theory; time-varying filters; bandwidth allocation; fast convergence times; high order systems; nonstationary system; nonuniform filter bank structure; objective function minimisation; reduced mean square error; subband adaptive filtering; subband analysis/synthesis filters; time-varying spectral characteristics; Adaptive filters; Channel allocation; Channel bank filters; Convergence; Eigenvalues and eigenfunctions; Filter bank; Mean square error methods; Power system modeling; System identification; Time varying systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on

Conference_Location

Munich

ISSN

1520-6149

Print_ISBN

0-8186-7919-0

Type

conf

DOI

10.1109/ICASSP.1997.598925

Filename

598925