Hanning window pole zero

i want design FIR filter digital method with Hanning window but i've a trouble. In part of filter specify order, i want 20 order's but in part of current Filter Information looks "Order : 19". why this happening? thanks

Answer 1

[Honglei Chen]

Hi Romi,

It seems to be a bug in FDATool. The display panel is giving out the wrong answer. The designed filter is indeed a filter of order 20. If you look at the coefficients or the impulse response, there are indeed 21 coefficients. Thanks for reporting the issue.