期刊
SIGNAL PROCESSING
卷 107, 期 -, 页码 433-443出版社
ELSEVIER
DOI: 10.1016/j.sigpro.2014.04.012
关键词
Modified filtered-x least mean square (FxLMS); Active noise control; Fractional least mean square (LMS); Online secondary path modeling
In this paper, a new adaptive strategy based on fractional signal processing is proposed using multi-directional step size fractional least mean square algorithm for online secondary path modeling, which is a fundamental problem in practical active noise control systems, as opposed to the generally-employed increasing step size strategy that compromises model accuracy for faster convergence. The design approach presents step size strategy in relation with disturbance signal in the desired response of modeling filter which is not available directly so an indirect approach is used to track its variations. Comparative results for narrowband and broadband noise signals show that the proposed technique outperforms other state-of-the-art methods in terms of model accuracy and convergence rate. (C) 2014 Elsevier B.V. All rights reserved.
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