Unilateral z-Transform 2(x) Inez 7=0: Note (1)Ifx[n]=0 for n<0, then 2(2)=X(a (2)UZT of x[n]=BZT of xnjun]= roc always outside a circle and includes =oo For causal ltI systems, H(2)=H(z)Unilateral z-Transform Note: (1) If x[n] = 0 for n < 0, then (2) UZT of x[n] = BZT of x[n]u[n] ⇒ ROC always outside a circle and includes z = ∞ (3) For causal LTI systems