Noise cancelling method and noise cancelling unit

Details Noise cancelling method and noise cancelling unit Noise cancelling method and noise cancelling unit

G - Physics

10

K

G10K 11/178 (2006.01) H03H 21/00 (2006.01)

Patent

CA 2273552

A signal-to-noise power ratio estimation circuit 22 detects an error signal power of an error signal output from a subtracter 13 and a pseudo noise signal power of a pseudo signal output from an adaptive filter 12 and, based on the detected signal powers, outputs an estimated value SNR1 of a signal-to-noise power ratio. An SNR average circuit 20 calculates an average value SNR4 of the SNR1. A step size output circuit 21 controls the step size of she adaptive filter 12 according to the SNR4 value.

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