Also, see http://gnuradio.org/redmine/projects/gnuradio/wiki/SignalProcessing where some of my own questions have been answered.
Very Respectfully, Dan CaJacob On Sat, Jul 5, 2014 at 11:37 AM, jason sam <user0...@gmail.com> wrote: > ok thanx for the replies! > > On Sat, Jul 5, 2014 at 7:19 PM, Vanush Vaswani <van...@gmail.com> wrote: > > You may refer to this example to see how to transmit 9.6kbps GFSK > > signal through an AWGN channel. > > > > https://www.youtube.com/watch?v=N1hR6VgWeow&feature=youtu.be > > > > > > > > On Sun, Jul 6, 2014 at 12:00 AM, Marcus Müller <marcus.muel...@ettus.com> > wrote: > >> We might be talking about different blocks. > >> I'm referring to gr::analog::frequency_modulator_fc, where the > >> documentation only says[1] > >> > >> radians/sample = amplitude * sensitivity > >> > >> From what you paste as formulas this does not look like the general > >> frequency modulation, but like a digital modulation scheme, e.g. GMSK. > >> > >> Anyway, we will not be able to tell you what you'll need to use as > >> parameters for your transmitter -- that is something that you, based on > >> your communication engineering skills, will need to decide yourself. > >> > >> Sincerely, > >> Marcus Müller > >> > >> [1] > http://gnuradio.org/doc/doxygen/classgr_1_1analog_1_1frequency__modulator__fc.html#a9c252eeb8c9daf6ccd50427d3bc55bd3 > >> > >> On 05.07.2014 09:59, jason sam wrote: > >>> Sorry for prolonging the discussion but I am a bit confused here.The > >>> sensitivity parameter for Freq Mod block is defined as: > >>> > >>> sensitivity = (pi * modulation_index) / samples_per_symbol > >>> where, > >>> > >>> modulation_index = deviation / (baud_rate / 2) > >>> > >>> So what values should i plug in for samples_per_symbol and baud_rate > >>> in the formulas? > >>> > >>> > >>> On Fri, Jul 4, 2014 at 9:14 PM, Marcus Müller < > marcus.muel...@ettus.com> wrote: > >>>> Not at all, because for these blocks, symbols have no meaning. > >>>> > >>>> On 04.07.2014 17:38, jason sam wrote: > >>>>> Yes Marcus,u are r right and i am also asking about such blocks like > >>>>> the FM Mod block..In this block u have an option to set sample rate > >>>>> but how can u set samples per symbol?? > >>>>> > >>>>> On Fri, Jul 4, 2014 at 6:08 PM, Marcus Müller < > marcus.muel...@ettus.com> wrote: > >>>>>> Hi Ali, > >>>>>> as said several times: Sampling rate, samples per symbol etc are > >>>>>> concepts that are meaningful only for certain blocks, and thus > there is > >>>>>> no sense in setting those globally. > >>>>>> > >>>>>> Greetings, > >>>>>> Marcus > >>>>>> On 04.07.2014 08:33, jason sam wrote: > >>>>>>> Thanx Martin,but where in GRC we can set samples per symbol??I am > new > >>>>>>> to this so i don't know yet... > >>>>>>> > >>>>>>> Ali > >>>>>>> > >>>>>>> On Tue, Jul 1, 2014 at 2:18 PM, Martin Braun < > martin.br...@ettus.com> wrote: > >>>>>>>> On 06/26/2014 11:06 AM, jason sam wrote: > >>>>>>>>> I am bit confused b/w the two terms.I have read some material > and i > >>>>>>>>> got the following relationship b/w the two: > >>>>>>>>> samples/second =samples/symbol * symbols/second > >>>>>>>>> And i think in GRC samples per symbol is 1(plz correct if i am > >>>>>>>>> wrong).So sample rate becomes equal to baud > rate(symbols/second)?? > >>>>>>>> samples per symbol is whatever you set it to; common values are 2 > and 4 > >>>>>>>> (this also depends on the modulation used). Higher values are > often used > >>>>>>>> for demo purposes. > >>>>>>>> > >>>>>>>> M > >>>>>>>> > >>>>>>>> > >>>>>>>> _______________________________________________ > >>>>>>>> Discuss-gnuradio mailing list > >>>>>>>> Discuss-gnuradio@gnu.org > >>>>>>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >>>>>>> _______________________________________________ > >>>>>>> Discuss-gnuradio mailing list > >>>>>>> Discuss-gnuradio@gnu.org > >>>>>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >>>>>> _______________________________________________ > >>>>>> Discuss-gnuradio mailing list > >>>>>> Discuss-gnuradio@gnu.org > >>>>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >> > >> > >> _______________________________________________ > >> Discuss-gnuradio mailing list > >> Discuss-gnuradio@gnu.org > >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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