Conference Proceeding

Mean-Square Performance Analysis of the Normalized Subband Adaptive Filter

Inst. for Inforcomm Res., Singapore
Circuits, Systems and Computers, 1977. Conference Record. 1977 11th Asilomar Conference on 12/2006; DOI:10.1109/ACSSC.2006.356625 pp.248 - 252 In proceeding of: Signals, Systems and Computers, 2006. ACSSC '06. Fortieth Asilomar Conference on
Source: IEEE Xplore

ABSTRACT This paper presents the mean-square performance analysis of a class of normalized subband adaptive filters (NSAF) using the concept of energy conservation. The NSAF has a unique weight-control mechanism whereby subband error signals are used to update a fullband tap-weight vector. We show that an energy conservation relation can be established for the weight adaptation. Subsequently, an expression for the steady-state excess mean-square error (MSE) and the necessary condition on the step size for mean-square stability can then be derived by manipulating various error quantities of the energy conservation relation. Simulation results are presented to corroborate the mathematical analysis.

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Keywords

energy conservation
 
energy conservation relation
 
fullband tap-weight vector
 
mathematical analysis
 
mean-square performance analysis
 
MSE
 
NSAF
 
paper presents
 
step size
 
unique weight-control mechanism
 
weight adaptation