To whom it may concern: I don't know osmocom_spectrum_sense well enough to answer this, but I believe that the purpose of the overlapping is to remove aliasing and the filter roll-off. If that is the case, you must drop from the both side, not from one side (assuming symmetrical filter).
Regarding the size of the dropped bins, I believe Sylvain Munaut's explanation is correct (12.5% from both side). Regards, Kyeong Su Shin On Wed, Jan 25, 2017 at 12:38 AM, Sylvain Munaut <246...@gmail.com> wrote: > > Does anyone know why the first and last 25% of FFT bins are discarded? I > am > > talking about the following lines of code: > > > > line 267: bin_start = int(tb.fft_size * ((1 - 0.75) / 2)) > > line 277: bin_stop = int(tb.fft_size - bin_start) > > Read that code again ... it discards the first and last 12.5% ... so > that it discards 25% in total. > > > Cheers, > > Sylvain > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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