engineering recuitment GATE EE 2023-24 Test Series Signals and Systems Discrete Time Fourier Transform (DTFT) Condition For Existence of DTFT
For certain sequences which are neither absolutely summable nor square summable, it is possible to have a Fourier Transform (FT) representation if we
1
take short time FT
2
evaluate FT only the real part of the sequence
3
allow DTFT to contain impulses
4
evaluate FT over a period time span