5 taken from an old exam suppose that x t is

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Unformatted text preview: ral density SW ( f ) = N0 2 t Watts/Hz for all f . Define X (t ) = ∫ "W (τ ) − W (τ − T )$ dτ where T > 0 is some delay. # % −∞ a) Show that X (t ) is wide- sense stationary. b) Find SX ( f ) (the power spectral density of X (t ) ). c) What frequency components are not present (or more precisely, have zero power density) in X (t ) ? 5. (Taken from an old exam.) Suppose that X (t ) is a mean- zero...
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