Check out the FSK : Digital section of https://wiki.gnuradio.org/index.php/SignalProcessing Shows you how to set up some variables you'll need. Freq modulator and quadrature demodulator are important. So is filtering.
On Tue, Mar 20, 2018 at 7:49 AM Murray Thomson <murraythomson...@gmail.com> wrote: > Hi, > > I would like to build an FSK modulator/demodulator. I'm using file > sink/sources for the moment. I need to be able to specify the two > frequencies, baud rate and sample rate (ideally at runtime). > I started with the gr-tutorial for qpsk, hoping to replace the > modulation/demodulation with gfsk blocks, but I didn't get the result I was > hoping for. I don't fully understand the gfsk module or how to change the > frequencies after the modulation. I tried the fsk burst modem example, but > it's not what I want. I would rather not use PDUs and I don't want to > transmit in bursts. > I would really appreciate if someone could point me to a tutorial or > example on this. These are the resources I have read so far: > > > https://github.com/gnuradio/gr-tutorial/blob/master/examples/tutorial7/mpsk_stage6.grc > https://nccgroup.github.io/RFTM/fsk_transmitter.html > > https://www.reddit.com/r/GNURadio/comments/3u5zp2/gnu_radio_gfsk_modulation_rate_deviation/ > > http://www.indigresso.com/wiki/doku.php?id=opentag:radios:testing_with_gnuradio > > https://oshearesearch.com/index.php/2015/05/31/building-a-burst-fsk-modem-in-gnu-radio-with-message-lambda-blocks-and-eventstream/ > > Many thanks, > Murray > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > -- Very Respectfully, Dan CaJacob
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