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! Name  
 
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! <math> x(t) \longrightarrow \ </math>
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! <math> \mathcal{X}(\omega) </math>
 
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Revision as of 16:28, 14 November 2018

CTFT of periodic signals and some properties with proofs

Function CTFT Proof
$ sin(\omega_0t) $ $ \frac{\pi}{j}(\delta(\omega - \omega_0) - \delta(\omega+\omega_0)) $
$ cos(\omega_0t) $ $ \pi(\delta(\omega - \omega_0) + \delta(\omega+\omega_0)) $
$ e^{j\omega_0t} $ $ 2\pi\delta(\omega - \omega_0) $
$ \sum_{k=-\infty}^{\infty}u(t+5k) - u(t-1+5k) $
Name $ x(t) \longrightarrow \ $ $ \mathcal{X}(\omega) $
Linearity $ ax(t) + by(t) \ $ $ a \mathcal{X}(\omega) + b \mathcal{Y} (\omega) $
Time Shifting
Frequency Shifting
Conjugation
Scaling
Multiplication
Convolution
Differentiation
Parseval's Relation

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Basic linear algebra uncovers and clarifies very important geometry and algebra.

Dr. Paul Garrett