Editor’s note: I came across this excellent tutorial article on Digital Filter Design and I thought it would be an excellent guide for novices as well as seasoned veterans. I want to thank William H.

The design of finite impulse response (FIR) filters remains a cornerstone of digital signal processing, with ongoing efforts to refine both the algorithmic and hardware aspects of their implementation ...

Linear filters are inherently unsuited to the task of data cleaning because they cannot achieve both of these objectives together, but some nonlinear FIR filters nicely achieve both of these ...