Feedforward active noise control with a new variable tap-length and step-size filtered-X LMS algorithm

Dah Chung Chang, Fei Tao Chu

研究成果: 雜誌貢獻期刊論文同行評審

40 引文 斯高帕斯(Scopus)

摘要

The fixed tap-length and step-size filtered-X least mean-square (FxLMS) algorithm is conventionally used in active noise control (ANC) systems. A tradeoff between the performance and the convergence rate is a well-known problem due to the choice of the step size. Although the variable-step-size FxLMS algorithms have been proposed for fast convergence, a long tap-length filter is frequently required in order to deal with different environments such that the convergence rate is still subject to a small step size for the long tap length. In this paper, we study a new ANC system with a variable tap-length and step-size FxLMS algorithm. Based on the assumption of an unsymmetric and two-sided exponential decay response model for the ANC control filter, the new FxLMS algorithm has the minimum mean-square deviation for the optimal filter coefficients. In the online secondary path modeling ANC system, simulation results show that the new algorithm with different kind of variable step sizes can provide significant improvements of convergence rate and noise reduction ratio, compared to the fixed-tap-length FxLMS algorithms.

原文???core.languages.en_GB???
頁(從 - 到)542-555
頁數14
期刊IEEE Transactions on Audio, Speech and Language Processing
22
發行號2
DOIs
出版狀態已出版 - 2月 2014

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