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Definition of Basic Signals and Functions

Sinc, Jinc, etc.
sinc function $ sinc(\theta)=\frac{sin(\pi\theta)}{\pi\theta} $
step function and related
CT unit step function $ u(t)=\left\{ \begin{array}{ll}1, & t\geq 0 \\ 0, & \text{ else}\end{array}\right., \text{ for }t\in {\mathbb R} $
DT unit step function $ u[n]=\left\{ \begin{array}{ll}1, & n\geq 0 \\ 0, & \text{ else}\end{array}\right., \text{ for }n\in {\mathbb Z} $
unit impulse signal (Dirac Delta) and related
CT unit impulse (Dirac Delta)

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