Title :
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
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;
Conference_Titel :
Signals, Systems, and Computers, 1999. Conference Record of the Thirty-Third Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-5700-0
DOI :
10.1109/ACSSC.1999.831841
