Finite impulse response
TYPE OF FILTER IN SIGNAL PROCESSING
FIR filter; Finite Impulse Response; Fir filter; Window design method; Finite impulse response filter; Tap (signal processing); Feed-forward filter
In signal processing, a finite impulse response (FIR) filter is a filter whose impulse response (or response to any finite length input) is of finite duration, because it settles to zero in finite time. This is in contrast to infinite impulse response (IIR) filters, which may have internal feedback and may continue to respond indefinitely (usually decaying).