Hi Jose, so, the flow graphs in the tutorial do timing and frequency synchronization, but what they don't do is any kind of framing: you just won't know if the first bit you decoded is a the first bit of a byte, or from somewhere in the middle; that's what you're seeing here, probably!
Best regards, Marcus On 28.05.2016 19:42, Jose Perez wrote: > Hi all, > > I am studying the tutorial 7: PSK Symbol Recovery. For it, I am using the > mpsk_stage6.grc example flowgraph. > But I am trying to simulate a transmition of a txt file. I can see the > decoded signal on the scope perfectly but I would like to save this received > file. > According the tutorial, after diferential decoder it have a Map block that > maps the original symbols from 0-3, so unpack those 2 bits per symbol into > bits using the unpack bits block... and then we have the original bit > stream of data. > To save the received txt file, I am using the repack bits block after the > unpack bits block, i.e., after the Unpack 2 bits I use the Pack 8 bits and > File Sink block... but the outputed file shows wrong character. > > I don't know why it is wrong.... it should works fine > Someone could help me with it? It looks be a simple thing to do but I can > not see what to do. > > Thanks > > > > -- > View this message in context: > http://gnuradio.4.n7.nabble.com/Help-Tutorial-PSK-Symbol-Recovery-tp60228.html > Sent from the GnuRadio mailing list archive at Nabble.com. > > _______________________________________________ > 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
