Hi Marcus, Clear for me now, thank you very much! Have a good day, Marcin czw., 4 sie 2022 o 13:38 Marcus Müller <mmuel...@gnuradio.org> napisał(a):
> Hi Marcin, > > well, that flow graph only serves the purpose of pre-modulating things, > e.g. for preamble > correlation, I'd speculate that's for when you want to e.g. simulate a > channel impulse > response, or some external band-limiting filtering on your already > pulse-shaped signal. > > However, you're right, neither in the GRC examples nor in any test cases > we have do we > make use of that taps vector (other than `[1]` as the perfect channel). > > Cheers, > Marcus > > On 04.08.22 09:43, Marcin Puchlik via GNU Radio, the Free & Open-Source > Toolkit for > Software Radio wrote: > > Hello Community, > > Recently I investigated Modulate Vector > > <https://wiki.gnuradio.org/index.php?title=Modulate_Vector> block and > my observations are > > that this block has two filtering stages - firstly in the modulator (RRC > filter) and > > secondly in itself (user providing the filter taps). The simple scheme > of operation looks > > like in the below picture. > > So the question is: what is the purpose of the filter in > modulate_vector_bc > > < > https://github.com/gnuradio/gnuradio/blob/master/gr-digital/lib/modulate_vector.cc > > function? > > Is this a bug or is there a reason for this? > > Modulate vector question.png > > -- > > BR, > > > > Marcin Puchlik____ > > > > > >
