Multichannel active noise control algorithms using inverse filters
نویسندگان
چکیده
1.0 Introduction For active noise control (ANC) systems, a common approach is to use adaptive FIR filters trained with the filtered-x LMS algorithm [1], for both feedforward systems and Internal Model Control (IMC) feedback systems, in monochannel or multichannel systems. Variations of the algorithm sometimes called the modified filtered-x LMS algorithm have been published [2], which can achieve a faster convergence speed by using a larger step size in the algorithm. Fast exact realizations of the filtered-x LMS and the modified filtered-x LMS algorithms have also been published [2]. In most cases, these fast realizations can reduce the computational complexity of the filtered-x LMS and modified filtered-x LMS algorithms for multichannel systems.
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