Discrete-Time Fourier Transform Example- The dtft of the unit sample sequence 8[n is given by △(e0)=∑8 n]e on=80]=1 n=-0 Example - Consider the causal sequence xm=∞m],a<1 Copyright C 2001, S K. MitraCopyright © 2001, S. K. Mitra 9 Discrete-Time Fourier Transform • Example - The DTFT of the unit sample sequence d[n] is given by • Example - Consider the causal sequence ( ) = d[ ] = d[0] =1 − w  =− w j n n j e n e x[n] =  [n],  1 n