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Cutoff frequency from the Transfer Function

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DivyaKrishnappa

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Hello everyone,

I wanted to know the cutoff frequency from the transfer function.
Transfer function of LPF is given by
Code: 
(1-z^-6)^2/(1-z^-1)^2.
So the coefficients are
Code: 
b = [1 0 0 0 0 0 -2 0 0 0 0 0 1]
a = [1 -2 1];

h = filter(b,a,[1 zeros(1,12)]);

How to find out cutoff frequency for this..?
 

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