Discrete-Time Signals. Time-Domain Representation Example-x[n=cos0 25n is a real sequence fIn])=(e03n is a complex sequence We can write vln=cos0 3n+sino3ng coso3n+j sinO3n) where rez reln]=cos03n Vim[n=(sino 3n) Copyright C 2001, S.K. Mitra9 Copyright © 2001, S. K. Mitra Discrete-Time Signals: Time-Domain Representation • Example - is a real sequence • is a complex sequence • We can write where {x[n]}={cos0.25n} { [ ]} { } j . n y n e 0 3 = {y[n]}={cos0.3n + jsin0.3n} ={cos0.3n}+ j{sin0.3n} {y [n]} {cos . n} re = 0 3 {y [n]} {sin . n} im = 0 3