Hi Matt, why did you use K=8, then? As far as I can see, a 16-QAM carries log_2(16)=4 bit of data per symbol, not 8.
Also: packet decoder is in the "deprecated" category for good reason: it randomly, non-debuggably (as far as I can tell) drops data. While you're at it, I'd recommend replacing your WX visualization blocks with their Qt counterparts – we've already removed WX from the current development version of GNU Radio, and it won't be part of GNU Radio 3.8. Best regards, Marcus On Mon, 2018-11-19 at 16:17 +0000, Matthew J. Brandsema wrote: > Hello, > > Thanks for your replies! > > When I do that, the demodulator outputs unpacked bytes (0s and 1s). I tried > using the “Pack K Bits” and “Unpacked to Packed” blocks separately (setting K > = 8) and it did not work. > > By “did not work” I mean, my input into the modulator were numbers between 0 > and 15, and when I pack 8 bits at a time, I get numbers between 0 and 255. > > --------------------------------------- > Matt Brandsema > Assistant Research Professor > Applied Research Laboratory at Penn State University > Phone: c: (201) 259-3584 w: (814) 865-5783 > > From: Achilleas Anastasopoulos [mailto:anas...@umich.edu] > Sent: Monday, November 19, 2018 10:15 AM > To: Matthew J. Brandsema <mjb...@arl.psu.edu>; Discuss-gnuradio@gnu.org > Subject: [Discuss-gnuradio] Packet Decoder Breaking when adding noise > > ...neither do you want the extended FEC encoder/decoder. > > Just send random symbols through the QAM modulator, add noise and demodulate > with the QAM demodulator. > > Achilleas > _______________________________________________ > 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
