Electronics and Communication Engineering - Signals and Systems - Discussion

Discussion Forum : Signals and Systems - Section 1 (Q.No. 12)
12.
The system with given pole-zero diagram is
casual
non-casual
both sided
not-possible
Answer: Option
Explanation:

Because no.of zero is more than Pole, therefore when you find transfer function.

Numerator power will higher than denominator, and such transfer functions is not realizable.

Discussion:
3 comments Page 1 of 1.

Devyanee chandra said:   8 years ago
One pole and one zero cancels each other i.e. 1/4. H(z) = z + 3(z/z - 4).

For if roc is |z|>4 then it is not stable and if ROC is |z|<4 then it is stable. But ROC is not mentioned in question so it is not possible to define stability.
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Aanal said:   8 years ago
Yes @Vikas. It must be non-causal system.

Vikas said:   9 years ago
If Numerator power is higher than denominator I heard it is a non-causal system.

Can anyone give me clarity about this?
(1)

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