Hey Adrian, The gnuradio-companion pipelines I used for the test are attached. These grc pipelines are only meant to get 16-bit 48k samples in and out of the HackRF and rtlsdr for testing. The meat of the FSK is done with the C fsk modem, used in freedv_rx, freedv_tx, fsk_mod, and fsk_demod. We are also running our FSK modem directly from SDR samples instead of through FM radios. We will be running 2400B over legacy FM radios, but don't yet have the same degree of test coverage.
Thanks, Brady O'Brien On Wed, Mar 16, 2016 at 3:34 PM, Adrian Musceac <kanto...@gmail.com> wrote: > Hi David, > > Is it possible to get our hands on the Gnuradio code? I've been trying > to optimize modems running at 1200 bits/second and the best I could do > was 100% copy at 8 dB above analog FM for DBPSK and 12 dB above for > GMSK. Your modem seems to be 16-20 dB better than that! If I could see > the Gnuradio graph maybe I could figure out what I'm doing wrong. > > Thanks, > Adrian > > On 3/16/16, Steve <coupaydevi...@gmail.com> wrote: > > Ha, I wish it was through a radio! > > > > I'm trying to think what I have laying around here that might make a good > > transmitter for it. > > > > On Wed, Mar 16, 2016 at 4:02 AM, glen english <g...@cortexrf.com.au> > wrote: > > > >> ah. good stuff. nice progress. > >> > >> > >> On 16/03/2016 7:50 PM, Steve wrote: > >> > >> Just using the script: > >> > >> freedv_tx 2400A ve9qrp_10s.raw modem.raw > >> > >> Which produces a RAW audio file sampled at 48 kHz and importing that > into > >> audacity. > >> > >> On Wed, Mar 16, 2016 at 3:46 AM, glen english <g...@cortexrf.com.au> > >> wrote: > >> > >>> Hi Steve > >>> > >>> Nice > >>> > >>> is that through a PA- if so, linear or linear in say 3dB compression? > >>> > >>> > >>> On 16/03/2016 7:42 PM, Steve wrote: > >>> > >>> Thought I'd upload a spectrum snapshot. You can't really see the > >>> carriers > >>> until you drop the number of samples to about 256, but this shows how > >>> wide > >>> it is. > >>> > >>> I noticed that the freedv_tx was outputting +/- 1.0 signals and a > couple > >>> of clips going on. Maybe need to knock it down to +/- .5 like the old > >>> FDM > >>> modes. > >>> > >>> FYI > >>> > >>> Steve > >>> > >>> > >>> > >>> > ------------------------------------------------------------------------------ > >>> Transform Data into Opportunity. > >>> Accelerate data analysis in your applications with > >>> Intel Data Analytics Acceleration Library. > >>> Click to learn > >>> more.http://pubads.g.doubleclick.net/gampad/clk?id=278785231&iu=/4140 > >>> > >>> > >>> > >>> _______________________________________________ > >>> Freetel-codec2 mailing > >>> listFreetel-codec2@lists.sourceforge.nethttps:// > lists.sourceforge.net/lists/listinfo/freetel-codec2 > >>> > >>> > >>> > >>> > >>> > ------------------------------------------------------------------------------ > >>> Transform Data into Opportunity. > >>> Accelerate data analysis in your applications with > >>> Intel Data Analytics Acceleration Library. > >>> Click to learn more. > >>> http://pubads.g.doubleclick.net/gampad/clk?id=278785231&iu=/4140 > >>> _______________________________________________ > >>> Freetel-codec2 mailing list > >>> Freetel-codec2@lists.sourceforge.net > >>> https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > >>> > >>> > >> > >> > >> > ------------------------------------------------------------------------------ > >> Transform Data into Opportunity. > >> Accelerate data analysis in your applications with > >> Intel Data Analytics Acceleration Library. > >> Click to learn > >> more.http://pubads.g.doubleclick.net/gampad/clk?id=278785231&iu=/4140 > >> > >> > >> > >> _______________________________________________ > >> Freetel-codec2 mailing > >> listFreetel-codec2@lists.sourceforge.nethttps:// > lists.sourceforge.net/lists/listinfo/freetel-codec2 > >> > >> > >> > >> > >> > ------------------------------------------------------------------------------ > >> Transform Data into Opportunity. > >> Accelerate data analysis in your applications with > >> Intel Data Analytics Acceleration Library. > >> Click to learn more. > >> http://pubads.g.doubleclick.net/gampad/clk?id=278785231&iu=/4140 > >> _______________________________________________ > >> Freetel-codec2 mailing list > >> Freetel-codec2@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > >> > >> > > > > > ------------------------------------------------------------------------------ > Transform Data into Opportunity. > Accelerate data analysis in your applications with > Intel Data Analytics Acceleration Library. > Click to learn more. > http://pubads.g.doubleclick.net/gampad/clk?id=278785231&iu=/4140 > _______________________________________________ > Freetel-codec2 mailing list > Freetel-codec2@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 >
rtlsdr-rx.grc
Description: application/gnuradio-grc
hackrf-tx.grc
Description: application/gnuradio-grc
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