A random process x(n) is characterized by the power density spectrumwhere ?2? is a constant (scale factor).(a)

Question:

A random process x(n) is characterized by the power density spectrumwhere ?2? is a constant (scale factor).(a) If we view ?xx(f) as the power spectrum at the output of a linear pole-zero system H(z) driven by white noise, determine H(z).(b) Determine the system function of a stable system (noise-whitening filter) that produces a white noise output when excited by x(n).