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For what kind of signals one sided z-transform is unique?

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in Digital Signal Processing by (829k points)
For what kind of signals one sided z-transform is unique?

(a) All signals

(b) Anti-causal signal

(c) Causal signal

(d) None of the mentioned

I got this question at a job interview.

My query is from One Sided Z Transform topic in division Z Transform and its Application – Analysis of the LTI Systems of Digital Signal Processing

1 Answer

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Best answer
Correct choice is (c) Causal signal

Easiest explanation: One sided z-transform is unique only for causal signals, because only these signals are zero for n<0.

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