Performance analysis of adaptive filter structures based on subband decomposition

Author

Petraglia, Mariane R. ; Mitra, Sanjit K.

Author_Institution

Dept. of Electr. Eng., Catholic Univ. of Rio de Janeiro, Brazil

fYear

1993

fDate

3-6 May 1993

Firstpage

60

Abstract

The properties of adaptive finite impulse response (FIR) filters in subbands are investigated, where the input signal is first decomposed in subband signals which are then modified at a lower rate by shorter adaptive filters. Two structures, with different coefficient adaptations, are studied. Expressions for the errors introduced by the nonideal characteristics of the filter banks are found, and a method for the optimal design of the analysis and synthesis banks for the adaptive filtering context is presented. The effect of the non-ideal filter bank characteristics in the adaptation speed of the multirate structures is investigated. The results of computer simulations considering an acoustic echo canceller application are presented

Keywords

FIR filters; adaptive filters; digital simulation; echo suppression; filtering theory; teleconferencing; acoustic echo canceller; adaptation speed; adaptive filter structures; coefficient adaptations; filter banks; finite impulse response; multirate structures; nonideal characteristics; subband decomposition; subband signals; Adaptive filters; Band pass filters; Computational complexity; Convergence; Filter bank; Finite impulse response filter; Performance analysis; Prototypes; Signal analysis; Signal synthesis;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1993., ISCAS '93, 1993 IEEE International Symposium on

Conference_Location

Chicago, IL

Print_ISBN

0-7803-1281-3

Type

conf

DOI

10.1109/ISCAS.1993.393657

Filename

393657