Electronic Communication Systems 2nd Edition by Roy Blake

تمرين 25

A 1 kHz sine wave with a peak value of 1 volt and no dc offset is sampled every 250 microseconds. Assume the first sample is taken as the voltage crosses zero in the upward direction. Sketch the results over 1 ms using:
(a) PAM with all pulses in the positive direction
(b) PDM
(c) PPM