Example 1.2
Find the trigonometrical Fourier series
expansion for the following waveform:

Solution
The general expression for the trigonometrical Fourier series expansion of a function x(t) is given by:

where


It is interesting to note that all of the Fourier series components for a train of pulses
(data bits) with width t (except for the dc component) are bounded
by the sinc(nt / T) envelope.