Nonlinear adaptive bilinear filters for active noise control systems

The reference and error channels of active noise control (ANC) systems may be saturated in real-world applications if the noise level exceeds the dynamic range of the electronic devices. This nonlinear saturation degrades the performance of ANC systems that use linear adaptive filters with the filte...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. 1, Fundamental theory and applications Fundamental theory and applications, 2005-03, Vol.52 (3), p.617-624
Main Authors: Kuo, S.M., Hsien-Tsai Wu
Format: Article
Language:English
Subjects:
Active filters
Active noise control
Active noise control (ANC)
Active noise reduction
adaptive bilinear filter
Adaptive control
Adaptive filters
adaptive Volterra filter
Algorithms
Channels
Control systems
Dynamical systems
Error correction
Noise level
nonlinear adaptive filters
Nonlinear control systems
Nonlinear dynamics
Nonlinear filters
Nonlinearity
Programmable control
Saturation
signal saturation
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Summary:The reference and error channels of active noise control (ANC) systems may be saturated in real-world applications if the noise level exceeds the dynamic range of the electronic devices. This nonlinear saturation degrades the performance of ANC systems that use linear adaptive filters with the filtered-X least-mean-square (FXLMS) algorithm. This paper derives a bilinear FXLMS algorithm for nonlinear adaptive filters to solve the problems of signal saturation and other nonlinear distortions that occur in ANC systems used for practical applications. The performance of this bilinear adaptive filter is evaluated in terms of convergence speed, residual noise in steady state, and the computational complexity for different filter lengths. Computer simulations verify that the nonlinear adaptive filter with the associated bilinear FXLMS algorithm is more effective in reducing saturation effects in ANC systems than a linear filter and a nonlinear Volterra filter with the FXLMS algorithm.
ISSN:1549-8328
1057-7122
1558-0806
DOI:10.1109/TCSI.2004.842429