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
