Adaptive multichannel digital filter with lattice-escalator hybrid structure

Author

Kim, Ki M. ; Cha, I.W. ; Youn, Dae H.

Author_Institution

Dept. of Electron Eng., Yonsei Univ., Seoul, South Korea

fYear

1990

fDate

3-6 Apr 1990

Firstpage

1413

Abstract

An adaptive multichannel digital filter structure that can be used in multichannel noise-cancelling applications is described. The proposed structure is a hybrid of the lattice and the escalator (Gram-Schmidt) structures, and the coefficients are updated using the least-mean-square algorithm. In the lattice-escalator hybrid structure, complete decorrelation of multiple reference signals is achieved by successively generating forward prediction error vectors via the lattice structure and decorrelating the elements of the error vectors using escalator linear combiners at each lattice stage. Simulation results indicate that the convergence speed of the hybrid structure is as fast as the escalator realization

Keywords

adaptive filters; convergence of numerical methods; digital filters; filtering and prediction theory; least squares approximations; Gram-Schmidt structure; adaptive multichannel digital filter; convergence speed; decorrelation; forward prediction error vectors; lattice-escalator hybrid structure; least-mean-square algorithm; multichannel noise-cancelling; multiple reference signals; Adaptive filters; Convergence; Decorrelation; Delay; Digital filters; Estimation error; Hybrid power systems; Lattices; Least squares approximation; Nonlinear filters; Signal generators; Vectors;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1990. ICASSP-90., 1990 International Conference on

Conference_Location

Albuquerque, NM

ISSN

1520-6149

Type

conf

DOI

10.1109/ICASSP.1990.115655

Filename

115655