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

I just got it to go to -18 dB at a delay of 24.  I apologize, my previous email was premature.  Let me play around a bit more before emailing.

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From: Matthew J. Brandsema
Sent: Tuesday, November 20, 2018 7:36 AM
To: anastas@umich.edu; Discuss-gnuradio@gnu.org
Subject: RE: [Discuss-gnuradio] Packet Decoder Breaking when adding noise

Hello,

I don't have QT gui so I had to convert to WX blocks (how do I install QT?). I cannot get the BER to change appreciably, no matter what delay I set.  The best I can get it to is only about -1 dB.  I will keep playing with it.

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From: Achilleas Anastasopoulos [anastas@umich.edu]
Sent: Monday, November 19, 2018 5:37 PM
To: Matthew J. Brandsema; Discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] Packet Decoder Breaking when adding noise

I attach a simple grc file that works for me.

Using the delay10/delay sliders try to align the input/output bit stream.

(in this example this happens at delay=12, but it may be different for you...)

Then play with the noise variance; you will see the BER changing slowly as you go around values = -6,-5,-4

let me know if this works for you,

Achilleas