|From:||Matthew J. Brandsema|
|Subject:||Re: [Discuss-gnuradio] Packet Decoder Breaking when adding noise|
|Date:||Tue, 20 Nov 2018 20:35:22 +0000|
Ah thanks! Makes perfect sense!
For my transmit/receive issue, I found out there is always a random phase offset upon tuning of the LOs. So I set up a matlab script that will correlate the two IQ streams and find this offset. While it is still running, I implement this offset in GNU and I do indeed see the BER drop.
The issue is, it doesn't drop very deep. Certainly not like the example simulation. I need to investigate the waveforms to see if there is too much noise. I will look at this over the next few days and if I have any more questions I will report back here. I don't want to overstay my welcome in regards to asking too many questions.
From: Achilleas Anastasopoulos address@hidden
Sent: Tuesday, November 20, 2018 3:08 PM
To: Matthew J. Brandsema
Subject: Re: [Discuss-gnuradio] Packet Decoder Breaking when adding noise
the random source outputs bytes with numbers 0 or 1 (NOT 2).
This single bit information is "packed" into a byte that is the input to the QAM modulator.
The QAM modulator internally breaks up these bytes and uses every 4 bits to signal the 16QAM constellation.
On Tue, Nov 20, 2018 at 3:03 PM Matthew J. Brandsema <address@hidden> wrote:
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