Question: (a) In the analysis of the optimum detector for DPSK, show that the random variables n 1 , n 2 , n 3 , and

(a) In the analysis of the optimum detector for DPSK, show that the random variables n1, n2, n3, and n4 have zero means and variances N0T / 4.

(b) Show that ω1,ω2,ω3, and ω4, have zero means and variances N0T / 8.

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