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Comb filter, feedback issue

Question asked by rmsnyder on Mar 19, 2013
Latest reply on Mar 28, 2013 by mmmike

Brett (and anyone else who might have some insight.)

 

Several months ago, you and I had discussed a comb filter implementation.  At the time, I was asking why the simulation/probe was not working properly.  We assumed that this was just a simulation problem and moved on.  Now we are finding that the filter does not actually work on the hardware as expected.

 

The equation that we want is : y(n) = x(n) - x(n - N) + alpha*y(n-N).

 

I have attached my implementation, and I'm not seeing what is wrong.  It behaves as if the y(n-N) is not there.

 

Best regards,

 

Bob

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