Appendix A Solutions to the Exercises 554 Solution 18.5 IJsing (18.21) arid (18.7), for uncorrelated signals ( P J Z ( ) = A*it?rz(rj ( P , - ( = B"P,,(4 With (18.8) and ( I 17), we ubtaiii: PZZ(.) + = 1AI2P/4TL(4 IBI2Py,,(T) Solution 18.6 a) H ( j w ) = -~23d +2 _ + ( p 2) ( w'L + 2gw + 2) and y 1iolds