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Re: VLF: Carrier on 4470.005 Hz! - EbNaut test

To: [email protected]
Subject: Re: VLF: Carrier on 4470.005 Hz! - EbNaut test
From: Markus Vester <[email protected]>
Date: Fri, 1 Sep 2017 08:47:55 -0400
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Congratulations both! A fine example of persevering work leading to a well-deserved success.

Best 73,

-----Ursprüngliche Mitteilung-----
Von: Paul Nicholson <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Fr, 1. Sept 2017 1:40
Betreff: Re: VLF: Carrier on 4470.005 Hz! - EbNaut test


Daily Eb/N0:

23rd -6.2 dB
24th -16.8 dB
25th -9.2 dB
26th -10.3 dB
27th -9.8 dB
28th -15.8 dB
29th -8.0 dB
30th -4.9 dB
31st -10.2 dB

Leaving out 24th and 28th, I decode 'PEACE' at Eb/N0 = -0.8 dB,
BER 41.9% constant reference phase.

I used a 'known phase' decode for this, using the phase measured
from your 2 day carrier.

It does not decode with a uniform phase search or a full phase
search. (the extra gain of the known phase decode is about 0.25 dB).

Ok, you see why my 0.13 dB rx mystery is important to solve!
We cannot afford to discard even 0.1 dB with these experiments.

Paul Nicholson

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