(→Specify a signal x(t)) |
(→Fourier Transform of x(t)) |
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== Fourier Transform of x(t) == | == Fourier Transform of x(t) == | ||
| + | :<math>\begin{align} X(\omega) &=\int_{-\infty}^{\infty} x(t) e^{-j\omega t}dt | ||
| + | \\&= \int_{-\infty}^{\infty} cos(8 \pi t)e^{-t^{2}}e^{-j\omega t}dt | ||
| + | \\&= \int_{-\infty}^{\infty}\frac{e^{j8\pi t}-e^{-j8\pi t}}{2}e^{-t^{2}}e^{-j\omega t}dt | ||
| + | |||
| + | \end{align}</math> | ||
Revision as of 16:20, 8 October 2008
Specify a signal x(t)
$ x(t)=cos(8 \pi t)e^{-t^{2}} $
Fourier Transform of x(t)
- $ \begin{align} X(\omega) &=\int_{-\infty}^{\infty} x(t) e^{-j\omega t}dt \\&= \int_{-\infty}^{\infty} cos(8 \pi t)e^{-t^{2}}e^{-j\omega t}dt \\&= \int_{-\infty}^{\infty}\frac{e^{j8\pi t}-e^{-j8\pi t}}{2}e^{-t^{2}}e^{-j\omega t}dt \end{align} $
