Discrete-Time Signals. Time-Domain Representation Block-diagram representation of the sampling process xa( t) x[n]=xa(t x(n t=nt C 2.-1.0 Copyright C 2001, S.K. Mitra5 Copyright © 2001, S. K. Mitra • Block-diagram representation of the sampling process ( ) a x t . . Discrete-Time Signals: Time-Domain Representation [ ] ( ) ( ) a a t nT x n x t x nT = = = n = ,− 2,−1,0,1,