Title :
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
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;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1990. ICASSP-90., 1990 International Conference on
Conference_Location :
Albuquerque, NM
DOI :
10.1109/ICASSP.1990.115655
