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Determine the values of power and energy of the following signals. Find whether signals are power, energy or neither energy nor power signals: x(n)=ej(π2n+π4)
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Solution:

x(n)=ej(π2n+π4)

To find Energy of x(n):

E=n=|x(n)|2=n=ej(π2n+π4)|2u(n)=n=|ej(π2n+π4)|2|ej(ω+θ)∣=1=n=1=

To find power of x(n):

P=lim

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