## Filter structureEdit

A Finite Impulse Response (FIR) filter's output is given by the following sequence:

The following figure shows the direct implementation of the above formula, for a 4^{th} order filter:

A Finite Impulse Response (FIR) filter's output is given by the following sequence:

- $y[n]=b_{0}x[n]+b_{1}x[n-1]+\cdots +b_{N}x[n-N]$

The following figure shows the direct implementation of the above formula, for a 4^{th} order filter: