Page 33 - Schaum's Outline of Theory and Problems of Signals and Systems

SIGNALS AND SYSTEMS [CHAP. 1

(4
Fig. 1-21

(c) T, = 1 s. From Fig. 1-21(d) we obtain

x[n] = (. . .,O, 1,O.. . .) = S[nl

1.4. Using the discrete-time signals x,[n] and x,[n] shown in Fig. 1-22, represent each of
the following signals by a graph and by a sequence of numbers.

(a) yJn1 =x,[nl +x,[nl; (b) y,[nI= 2x,[nl; (c) y,[nI =xJnIxJnl

Fig. 1-22