Hi Patrick, Thanks for the answer. I know about codec2, but how about what modulation to use? I read about the AOR ARD9000MK2[1] modem, that uses the: "G4GUO open protocol". Do you know if is possible to implement this OFDM based one?
Best regards, Rafael Diniz [1] - http://www.aorusa.com/ard9000.html > schrieb Rafael Diniz on 2011-01-08 03:30: >> Hi people, >> Have anyone successfully built a D-Star transmitter with gnuradio >> blocks? > > For the protocol part, see the archives[1]. IMO D-Star is a thing to > make money rather than a system to foster independent communication. > There are legal, privacy and free implementation issues. > > For the codec parth D-Star uses AMBE+ as codec, which is non-free. You > can buy codec ICs, but you cannot implement it in Open Source. See the > archives again for a discussion. > > Have a look at "codec2" [2], this should work fine for quite the same > requirements: low NF bandwidth, low bitrate, low latency. > > Regards Patrick > > [1] > http://search.gmane.org/?query=%22d-star%22&author=&group=gmane.comp.gnu.radio.general&sort=relevance&DEFAULTOP=and&xP=d%09star&xFILTERS=Gcomp.gnu.radio.general---A > [2] http://www.rowetel.com/blog/codec2.html > [3] http://codec2.org/ > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
