FIR (Finite Impulse Response) filters

An FIR (Finite Impulse Response) filter is a type of digital filter used in signal processing to modify or enhance signals. It works by taking an input signal and multiplying small segments of it by specific coefficients, then summing these results to produce an output. Because the filter's response depends on a finite number of these past input values, its effects are limited in duration, making it stable and predictable. FIR filters are widely used in audio, communications, and other electronic systems to remove noise, sharpen signals, or shape signals with precise control.