Normal
Re: FIR filtersGood question. I remember that I originally put it in there to deal with what I thought was an aliasing problem with the Gaussian windows as they are not band-limited. One could window the window with a finite window, I suppose :roll: To the extent that the impulse response being analyzed is band limited there should not be significant aliasing but there could be with test signals, such as an ideal impulse.Oversampling allows for time steps of less than 1 (input) sample, which makes for a prettier, though not more meaningful, display when expanding the time scale at high frequencies. On occasion I see what I think are artifacts at the high end of the range even with oversampling. There's something going on there I don't understand. Lot's of subtleties in this business...Best,--Frank
Re: FIR filters
Good question. I remember that I originally put it in there to deal with what I thought was an aliasing problem with the Gaussian windows as they are not band-limited. One could window the window with a finite window, I suppose :roll: To the extent that the impulse response being analyzed is band limited there should not be significant aliasing but there could be with test signals, such as an ideal impulse.
Oversampling allows for time steps of less than 1 (input) sample, which makes for a prettier, though not more meaningful, display when expanding the time scale at high frequencies. On occasion I see what I think are artifacts at the high end of the range even with oversampling. There's something going on there I don't understand. Lot's of subtleties in this business...
Best,
--Frank
