Discrete-Time Fourier Transform Its dtFT is given by XY(e10)=∑oune-~0n=∑ae~on n=- n=0 =∑(e n=0 1-ae J as ae j0=0<1 Copyright C 2001, S K. MitraCopyright © 2001, S. K. Mitra 10 Discrete-Time Fourier Transform • Its DTFT is given by as =   =   = − w  =− w − w 0 ( ) [ ] n n j n n j n j n X e n e e − w −  = − w =   = j e n j n e 1 1 0 ( )  =  1 − jw e