82.1 Discrete-Time Signals Time-Domain Representation Example- xn=cos0 25n is a real sequence yn]=ejU3n is a complex sequence · We can write Ry n1=cos03n +jsin03n) ={c003n}+j{sin03n} where yreln=(cos03n RymInsin03n§2.1 Discrete-Time Signals: Time-Domain Representation • Example - {x[n]}={cos0.25n} is a real sequence {y[n]}={ej0.3n} is a complex sequence • We can write {y[n]}={cos0.3n + jsin0.3n} = {cos0.3n} + j{sin0.3n} where {yre[n]}={cos0.3n} {yim[n]}={sin0.3n}