(→Problems) |
(→Problems) |
||
| Line 26: | Line 26: | ||
<math>x(t) = 3\cos(4t + \frac{\pi}{3})</math> | <math>x(t) = 3\cos(4t + \frac{\pi}{3})</math> | ||
| + | |||
| + | |||
* Not Periodic Continuous-Time Signal | * Not Periodic Continuous-Time Signal | ||
| − | <math>x(t) = e^{j(\ | + | |
| − | + | ||
| − | + | * Bonus Question | |
| + | |||
| + | <math>x(t) = e^{j(\pi-1)}</math> | ||
Revision as of 20:42, 4 September 2008
Periodic Signal Definition
- For a Continuous-time signal
There exists a positive value of T for which
$ x(t) = x(t - T) $
for all values of t.
- For a Discrete-time signal
There exists a positive integer N for which
$ x[n] = x[n + N] $
for all values of n.
Note: N is the period of the signal.
Problems
- Periodic Continuous-Time Signal
$ x(t) = 3\cos(4t + \frac{\pi}{3}) $
- Not Periodic Continuous-Time Signal
- Bonus Question
$ x(t) = e^{j(\pi-1)} $
