A fourier transform propertiesa if x t is real and even, Ask an Expert

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A. Fourier Transform properties

(a) If x ( t ) is real and even, show that its Fourier transform is real for all ω (i.e., its imaginary part is identically 0).

(b) If x ( t ) is real and odd, show that its Fourier transform is imaginary for all ω (i.e., its real part is identically 0)

B.Discrete-time Fourier Transform (DTFT)

B. Compute the DTFT of the following signals:

(a) a [ n ] = δ [ n - 2] + δ [ n + 2]

(b) b [ n ] = u [ n ] - u [ n - 4]

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