ACTIVE NOISE CONTROL SYSTEM AND METHOD IN ENCLOSED FIELD OF 3-DIMENSION USING C0RRELATION FILTERED-X LEAST MEAN SQUARES ALGORITHM

摘要

An active noise control system and method in enclosed field of 3-dimension using correlation filtered-x least mean squares algorithm are provided to improve the convergence performance of the FXLMS algorithm of DSP. The Co-FXLMS algorithm comprises an adaptive filter, an output element and a addition route estimating filter. The adaptive filter adapts actively according to the ambient conditions. The output element outputs the first route transfer function and addition route transfer function. An estimating value filter inputs the estimating value of the addition route transfer function. The actuator obtains the error signal by adding the first route transfer function and addition route transfer function. The cross correlation least-mean-square(100) controls the coefficient vector of the adaptive filter. The cross correlation least-mean-square extracts the cross correlation of the reference signal in real time.