GATE EC 2014 Set 2 — Question 27
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Signals & Systems → LTI Systems → Magnitude & Phase Response
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Question
An FIR system is described by the system functionThe system is
Correct answer
(C) mixed phase
Solution
To determine the phase type, we find the zeros of :
Setting the numerator to zero:
Using the quadratic formula:
The zeros are and .
Since (inside the unit circle) and (outside the unit circle), the system is a mixed phase system.
Setting the numerator to zero:
Using the quadratic formula:
The zeros are and .
Since (inside the unit circle) and (outside the unit circle), the system is a mixed phase system.
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