A stationary process X (t) is applied to a linear time-invariant

A stationary process X (t) is applied to a linear time-invariant

A stationary process X (t) is applied to a linear time-invariant filter of impulse response b (t), producing an output Y (t).
(a) Show that the cross-correlation function RYX (t) of the output Y (t) and the input X (t) is equal to the impulse response b (t) convolved with the autocorrelation function RX (t) of the input, as shown by, show that the second cross-correlation function RXY (t) equals
(b) Find the cross-spectral densities SYX (f) and SXY (f).
(c) Assuming that X (t) is a white noise process with zero mean and power spectral density N0/2, shows that. Comment on the practical significance of this result.

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