Wiley signals and systems e book TLFe BO 538

AiiDcndix A. Solutions to the Exercises

523

Solution 13.4

X2(z)=z-l+1+a=

X,(z)

= z-2

+ 2-1 + 1

z”zi-1

-

+ +_I

iz
z

1

_

-2

.ritk

X2‘k1
~.

All filters arc low-pass filters.

~