I have a question from a past paper that I am struggling to get my head around. Computing the energies is simple enough, however when it comes to finding which signal is periodic (which is probably simple enough) I cant figure out how to do it. I understand that for a signal to be periodic,
x[k] = x[k + N]. The zero time index for each signal is indicated for both signals. I have tried to find N but each time I go through the working neither signal is periodic so I must have the wrong N value. Any help would be appreciated! I've tried drawing out both signals but that doesn't really help because of aliasing.
x[k] = x[k + N]. The zero time index for each signal is indicated for both signals. I have tried to find N but each time I go through the working neither signal is periodic so I must have the wrong N value. Any help would be appreciated! I've tried drawing out both signals but that doesn't really help because of aliasing.