/technologies/fpga-group/b/blog/posts/the-art-of-fpga-design-season-2---post-14Polyphase Decimators The Polyphase Decimator FIR is the dual structure of the Polyphase Interpolator. The basic idea is that you can reduce the sample rate of a signal by a factor of M if you keep only one out of every M samples. This only works...en-USTelligent Community 12