Page 253 - Schaum's Outline of Theory and Problems of Signals and Systems

FOURIER ANALYSIS OF TIME SIGNALS AND SYSTEMS [CHAP. 5

(b)
Fig. 5-14

5-11. Find and sketch the magnitude spectra for the periodic square pulse train signal x(t)
shown in Fig. 5-15(a) for (a) d = T0/4, and (b) d = T0/8.

Using Eq. (5.102a), we have

Note that c, = 0 whenever k wod/2 = m7r; that is,