| Line 3: | Line 3: | ||
ex: | ex: | ||
| − | <math> E_\infty = \int_{-\infty}^{\infty} [x(t)]^2 dt</math> | + | <math> E_\infty = \int_{-\infty}^{\infty} [x(t)]^2 dt |
| + | E_\infty = \int_{0}^{3} [1]^2 </math> | ||
Revision as of 10:35, 7 September 2008
Energy
$ E_\infty = \frac{1}{t_2-t_1}\int_{t_1}^{t_2}[x(t)]^2 dt $
ex: $ E_\infty = \int_{-\infty}^{\infty} [x(t)]^2 dt E_\infty = \int_{0}^{3} [1]^2 $
Power
$ P_\infty lim N-> - \infty = \frac{1}{2*N+1}\int_{-N}^{N}[x(t)]^2 dt $
