kronecker delta function
Table of Contents
Delta function denoting an impulse.
In the context of discrete signals, the sample function δ[n] denotes the value δn0 where
δij={0i≠j1i=j
Also see the dirac delta function.
So, δ[n−k] denotes a 1 where n=k.
1. Sifting property
∞∑i=∞aiδij=aj