Rationally decimated constituent-based filterbanks for subband adaptive filters

Author

Griesbach, Jacob D. ; Lightner, Michael

Author_Institution

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

Volume

2

fYear

1999

fDate

24-27 Oct. 1999

Firstpage

908

Abstract

Subband adaptive filters (SAFs) are commonly used in high-order adaptive systems. Typically, integer decimated filterbanks are implemented with SAFs due to their ease of design. However, integer subband rates constrain SAFs to perform suboptimally. This research outlines ideas for implementing rationally decimated filterbanks in uniform and non-uniform SAFs while allowing real-time bandwidth adaptation. Rational decimation rates can increase SAF performance and efficiency.

Keywords

adaptive filters; adaptive signal processing; channel bank filters; filtering theory; signal sampling; efficiency; high-order adaptive systems; integer decimated filterbanks; integer subband rates; nonuniform subband adaptive filters; rational decimation rates; rationally decimated constituent-based filterbanks; real-time bandwidth adaptation; reconstruction error simulations; uniform subband adaptive filters; upsampled constituent method; Acoustic applications; Adaptive filters; Adaptive systems; Band pass filters; Bandwidth; Echo cancellers; Filter bank; Finite impulse response filter; Jacobian matrices; Real time systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems, and Computers, 1999. Conference Record of the Thirty-Third Asilomar Conference on

Conference_Location

Pacific Grove, CA, USA

ISSN

1058-6393

Print_ISBN

0-7803-5700-0

Type

conf

DOI

10.1109/ACSSC.1999.831841

Filename

831841