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Re: VLF: EbNaut tonite

To: [email protected]
Subject: Re: VLF: EbNaut tonite
From: Paul Nicholson <[email protected]>
Date: Thu, 25 May 2017 19:50:31 +0000
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Stefan wrote:

> Well, let's try something for the record list again:

> f = 8270.100000 Hz
> Start time: 24.May.2017   20:00:00 UTC
> Symbol period: 10 s
> Characters: 160 ( 1 SMS length :-) )
> CRC bits: 10
> Coding 8K21A
> Duration: 22h

Copied

 "THIS IS THE FIRST SMS SENT OVER VLF BY RADIO AMATEURS.
  THANKS TO PAUL NICHOLSON, DL4YHF AND DF6NM FOR SOFTWARE
  DEVELOPMENTS.  JOIN IN THE EXPERIMENTS! 73, DK7FC"

Rank 0, constant reference phase;
Eb/N0 = +0.6 dB;
BER 27.3%;
carrier S/N: 30.17 dB in 12.6 uHz,
            -18.81 dB in 1Hz,
            -52.79 dB in 2.5kHz;

That's a new record message length for VLF.

--
Paul Nicholson
--

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