#### Question 1.5 Question 1.6 Question 1.7

## Factors affecting signal bandwidth

####  | #### It is perhaps instinctively obvious that a waveform which has sharp transitions in the time domain will have a much higher harmonic content than one with smooth transitions. This is because the sharp changes in waveform can only be constructed from a large number of low-level high frequency sinusoids in a Fourier series expansion. Hence, modulation formats that possess smooth pulse shapes or smooth phase transitions between symbol states are to be favoured when bandwidth is limited.