Example 1.1
Example 1.2
Example 1.3


Question 1.1
Question 1.2
Question 1.3

 

Spectrum of a periodic data pulse train

 

If we now consider the Fourier series expansion of a train of pulses representing successive data bits, we find (see examples) that the amplitudes of the frequency components are all constrained by a general spectral envelope which passes through zero at multiples of the data pulse width t.

This spectral envelope is given by the equation:

which is usually termed the sinc function.