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| − | <math>x(t) = e^{j(\pi-1)}</math> | + | |
| + | <math>x(t) = e^{j(\pi t-1)}</math> | ||
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| + | Is periodic, when graphed it produces a straigh line. | ||
Revision as of 19:43, 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 t-1)} $
Is periodic, when graphed it produces a straigh line.
