Conditions for convergence of a delayless subband adaptive filter and its efficient implementation

Author

Nishikawa, Kiyoshi ; Kiya, Hitoshi

Author_Institution

Dept. of Electr. Eng., Tokyo Metropolitan Univ., Japan

Volume

46

Issue

4

fYear

1998

fDate

4/1/1998 12:00:00 AM

Firstpage

1158

Lastpage

1167

Abstract

This article considers the convergence characteristics of the delayless subband adaptive digital filters (ADFs) proposed by Morgan and Thi (see ibid., vol.43, p.1819-30, 1995). We derive a formula for the step-size parameter to ensure the convergence of ADPs and show that the derived formula enables self-adjusting of its value to ensure convergence regardless of the type of analysis filters employed or characteristics of the input signals. Consideration on the efficient implementation of the structure using short-length analysis filters is given through the results of simulations

Keywords

adaptive filters; adaptive signal processing; convergence of numerical methods; digital filters; filtering theory; network parameters; convergence conditions; delayless subband adaptive filter; input signal characteristics; short-length analysis filters; simulations; step-size parameter; Adaptive filters; Channel bank filters; Convergence; Delay; Filter bank; Finite impulse response filter; Signal processing; Signal processing algorithms; Speech processing; Symmetric matrices;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/78.668569

Filename

668569