Nonlinear adaptive filter-based simplified bilinear model for multichannel active control of nonlinear noise processes

Authors:  Haiquan Zhao, Xiangping Zeng, Zhengyou He, Tianrui Li, Weidong Jin

Abstract:
To circumvent nonlinear distortions which occur in multichannel nonlinear active noise control (ANC) systems used for practical applications, a simplified bilinear leaky filtered-x least mean square (SBLFXLMS) algorithm for nonlinear adaptive filter is presented in this paper. The performance of the simplified bilinear adaptive filter is evaluated in terms of computational complexity and convergence characteristics. Computer simulations have been carried out to verify that the nonlinear adaptive filter with the SBLFXLMS algorithm is more effective in eliminating nonlinear distortions in multichannel nonlinear ANC systems than the linear FXLMS, second-order Volterra FXLMS (VFXLMS) and filtered-s LMS (FSLMS) algorithms. Furthermore, the analysis of the computational requirements and simulations results both show that the SBLFXLMS algorithm requires less computations without suffering from any performance degradation of mutichannel nonlinear ANC systems. 

Keywords:
Active noise control
Adaptive Volterra filter
Adaptive bilinear filter
Leaky algorithm
Filtered-x LMS algorithm

Published in: Applied Acoustics (Volume 74, Issue 12,  December  2013)

Publisher: Elsevier

ISSN Information: 0003-682X

Nonlinear adaptive filter-based simplified bilinear model for multichannel active control of nonlinear noise processes

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