Azzera filtri
Azzera filtri

Filter design - are taps the same are difference equation coefficients?

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Are taps the same are difference equation coefficients?
I'm not sure how they can be actually - or if they are I don't know how they relate.
  1 Commento
Matt Fig
Matt Fig il 2 Nov 2012
Tom's question
Are taps the same are difference equation coefficients?
I'm not sure how they can be actually - or if they are I don't know how they relate.

Accedi per commentare.

Risposta accettata

Wayne King
Wayne King il 21 Mag 2012
Yes, they are. The filter coefficients are also call taps, or tap weights.

Più risposte (1)

Honglei Chen
Honglei Chen il 21 Mag 2012
For example, the difference equation below represents a 2nd order IIR filter
y[n] = -a1*y[n-1]-a2*y[n-2] + b0*x[n] + b1*x[n-1] + b2*x[n-2]
The corresponding coefficients are
b = [b0 b1 b2] and a = [1 a1 a2]
To perform the filtering operation, you can do
y = filter(b,a,x)

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