Fourier Transform of discrete time signal (DTFT) - It's Properties

Q.  Which among the following assertions represents a necessary condition for the existence of Fourier Transform of discrete time signal (DTFT)?
- Published on 30 Nov 15

a. Discrete Time Signal should be absolutely summable
b. Discrete Time Signal should be absolutely multipliable
c. Discrete Time Signal should be absolutely integrable
d. Discrete Time Signal should be absolutely differentiable

ANSWER: Discrete Time Signal should be absolutely summable

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