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LMS Block for Acitve Noise Cancellation

Question asked by chzw on Nov 27, 2015

Hi,

 

I'm working on an active noise canecllation (ANC) System and I want to use a Sigma ADAU1442 Chip.

My first thought was to use the NLMS Filter Block. If i got it right, the algorithm looks like this:

 

NLMS_01.jpg

 

For ANC it's  desirable to use a FxLMS algorithm which is unfortunately not feasible with this block. Is it possible to add two pins like this?

 

NLMS_02.jpg

 

Or create a smaller Block like this:

 

NLMS_03.jpg

 

Thank you in advance.

 

Regards

Chris

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