I have a transfer function as

$$H(z) = \frac{-0.0625z^4 + 0.25z^3 + 0.625z^2 + 0.25z - 0.0625}{z^4}$$

I want to derive magnitude and phase response of this equation. enter image description here

can someone help me from here I am stuck.



1 Answer 1


HINT: The frequency response has the form


which can be rewritten as


Now note that the term in brackets is purely real-valued. I trust that you can take it from here.


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