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Exam Questions Papers

Q1:

The energy of constant-amplitude complex valued exponential sequence is __________ (where A is the constant amplitude)

A 0

B 1

C ∞

D A2

ANS:C - ∞

Let the constant amplitude complex valued exponential sequence. x(n) = Ae-jωn Energy = |x(n)|2 = |Ae-jωn|2 A2 |(e-jωn)|2 = A2(∞) = ∞ Hence energy in infinite.



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