The sinc function, also called “sampling function,” is a function that arises frequently in signal processing and Fourier analysis.

The full name of “sinc” is “sine cardinal.”

The unnormalized sinc function is defined as the following 1

The normalized sinc function is commonly defined for as 2

(It is called normalized because )

Si_sinc.svg.png

Footnotes

  1. Sinc Function — from Wolfram MathWorld

  2. Sinc function - Wikipedia