Rus(r) = E| [X14 —Ha) [Saree Ha] 
Rog(r) = E| [X21 Mo) Xou0r—H}| 
Ro,(r) = E| {X10 iol Grae - | eel a aideadiie Kon mn@-120) 
Ryo(7) = E| [X2,- ba} {X1e4r— -n}| a: Xp leading X; 
Ry(-r) = Ri) 
(2.141) 
Ry2(r) = Ra1Cr) 
*Denotes the complex conjugate. 
_ Ru) 
Q11(7) = Ri) 
R ; 
Q22(7) = == (2.142) 
R21(7) 
0218) = eer TO 
(R11(0) « Rao(0)}/? 
Then the spectrum matrix is 
bone 511M) — 512(@) (2.143) 
S21) — S22(W) 
where 
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