[Freetel-codec2] 2400A and Eb/No

Discussion:

Steve

2016-03-25 23:42:49 UTC

I was sort of shocked when I printed out the Eb/No computed values
available in 2400A. I guess I had in my mind getting values like 6 dB.

A few examples:

Eb/No = 43.12 dB
Eb/No = 42.83 dB
Eb/No = 42.96 dB
Eb/No = 42.22 dB

What exactly do those numbers mean? They seem off the chart :-)

Brady O'Brien

2016-03-26 01:49:16 UTC

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That's the Eb/N0 estimate out of the demod, as you've probably guessed.
What kind of sample are you running through the demod?

Post by Steve
I was sort of shocked when I printed out the Eb/No computed values
available in 2400A. I guess I had in my mind getting values like 6 dB.
Eb/No = 43.12 dB
Eb/No = 42.83 dB
Eb/No = 42.96 dB
Eb/No = 42.22 dB
What exactly do those numbers mean? They seem off the chart :-)
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Steve

2016-03-26 03:54:25 UTC

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It was the ve9qrp_10s.raw sent through the modulator. The amplitude is
pretty high out of the freedv_tx.

Post by Brady O'Brien
That's the Eb/N0 estimate out of the demod, as you've probably guessed.
What kind of sample are you running through the demod?

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Intel Data Analytics Acceleration Library.
Click to learn more.
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Brady O'Brien

2016-03-26 04:02:45 UTC

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That explains it. The Eb/N0 estimator tends to come up with a number around
46 dB if there's no noise over the channel.

Post by Steve
It was the ve9qrp_10s.raw sent through the modulator. The amplitude is
pretty high out of the freedv_tx.

Post by Brady O'Brien
That's the Eb/N0 estimate out of the demod, as you've probably guessed.
What kind of sample are you running through the demod?