Chapter 10 The z-transform §10.1TheZ- Transform X(z)=∑xk n=-00 x小]<2→>X(z) X(z=Fkn/- unit circle Xle z-e ROC=z=1 Z-plane 66 ( )   n n X z x n z − + =−  =  §10.1 The Z-Transform xn⎯→ X(z) Z ( )     n X z x n r − =F Chapter 10 The Z-Transform ROC  z =1 ( ) ( )   j z e j X e X z = = 0 1 Z-plane z =1 unit circle