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.

First, we will start by selecting the operating frequency for this FIR Filter. As we are only given a general transition region (0.2 $\pi$ to 0.23 $\pi$ rad/sample), I will assume that it is fair game ...

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