Re: [Discuss-gnuradio] beginner

[madengr]

Regarding doing it in C; everything seems to be mostly there to do it in
Python as a native GR application.

1) A QT-GUI text input box would be needed to buffer-up the transmit text as
it is typed, convert to varicode then drop the bytes into the transmit
stream, interrupting the continuous 01010101...  The modulation is simple.

2) The RX signal processing may be able to use the PSK receiver, then a
custom block would have to be written for the varidecoder, maybe dumping the
text as messages, or to stdout.

3) The latest QT frequency sink has a click to tune functionality,
generating a frequency message, and the frequency translating FIR filter has
a tuning message input.  What I don't know is if the PSK receiver has wide
enough carrier recovery for point-and-click tuning, given 31 bps and a 2 kHz
channel bandwidth.  I suppose some experimentation is in order.

Anyway, I think 50% of it is there already to do it all in GR.

Thanks,
Lou
KD4HSO


Levente Kovacs wrote
> My initial thought is that I feed the decoded bits to a TCP sink, and I
> write
> a GUI in C, that listens on that particular TCP port. Unix socket would be
> nicer, but I can't find a unix domain socket sink/source.





--
View this message in context: 
http://gnuradio.4.n7.nabble.com/beginner-tp50157p50170.html
Sent from the GnuRadio mailing list archive at Nabble.com.