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Re: [Discuss-gnuradio] Packet Decoder Breaking when adding noise

From: Matthew J. Brandsema
Subject: Re: [Discuss-gnuradio] Packet Decoder Breaking when adding noise
Date: Mon, 19 Nov 2018 16:17:00 +0000



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:address@hidden
Sent: Monday, November 19, 2018 10:15 AM
To: Matthew J. Brandsema <address@hidden>; address@hidden
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.



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