z-Transform a generalization of the dtft defined by Y(e0)=∑xmle Jon 1=-0 leads to the z-transform z-transform may exist for many sequences for which the dtft does not exist Moreover. use of z-transform techniques permits simple algebraic manipulations Copyright C 2001, S K MitraCopyright © 2001, S. K. Mitra 2 z-Transform • A generalization of the DTFT defined by leads to the z-transform • z-transform may exist for many sequences for which the DTFT does not exist • Moreover, use of z-transform techniques permits simple algebraic manipulations =   =−  −  n j j n X (e ) x[n]e