Title :
A new variable step size method for online secondary path modeling in multichannel (1×2×2) active noise control systems
Author :
Ahmed, Shakeel ; Tufail, M.
Author_Institution :
Dept. of Electr. Eng., Pakistan Inst. of Eng. & Appl. Sci. (PIEAS), Islamabad, Pakistan
Abstract :
Online secondary path modeling with higher modeling accuracy and faster convergence is desirable in active noise control systems. This paper proposes a method based on variable step size LMS algorithm for modelling filters and Multiple Error Filtered-X LMS (MeFxLMS) algorithm for noise control filter in 1×2×2 multichannel active noise control systems. The proposed idea uses a novel three stage approach for step size selection of modeling filters in order to improve the performance of secondary paths modeling. Consequently, a faster initial convergence and less steady state error are achieved in comparison with existing online secondary path modeling methods for multichannel ANC systems. The number of computations per iteration of the proposed method is comparable to the existing computationally efficient method for multichannel ANC with online secondary path modeling. The performance of the proposed method is verified through simulation results.
Keywords :
active noise control; convergence; filtering theory; iterative methods; least mean squares methods; variable structure systems; convergence; filter modelling; modeling accuracy; multichannel active noise control systems; multiple error filtered-X LMS algorithm; noise control filter; online secondary path modeling; variable step size method; Adaptive filters; Computational modeling; Filtering algorithms; Least squares approximation; Mathematical model; Microphones; Noise; Active Noise control; LMS; Multichannel; Multiple Error Filtered-X (MeFxLMS); Online Secondary Path Modelling; Variable step size;
Conference_Titel :
Information and Emerging Technologies (ICIET), 2010 International Conference on
Conference_Location :
Karachi
Print_ISBN :
978-1-4244-8001-2
DOI :
10.1109/ICIET.2010.5625684