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Re: ULF: First EbNaut message over > 1 wavelength on ULF

To: [email protected]
Subject: Re: ULF: First EbNaut message over > 1 wavelength on ULF
From: Paul Nicholson <[email protected]>
Date: Tue, 24 Jan 2017 18:08:04 +0000
Cc: wolf_dl4yhf <[email protected]>
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Stefan wrote:

> The first EbNaut message was decoded over a distance farer
> than 1 wavelength on the 101 km band.

Well done.   And it gets better -

> f = 2970.000000 Hz
> Start time: 24.Jan.2017   08:00:00 UTC
> Symbol period: 30 s
> Characters: 3
> CRC bits: 18
> Coding 16K25A

Decoded at Bielefeld distance 303.8km via DL4YHF's online

Copied 'ULF' at Eb/N0 = +2.4 dB constant reference phase.
BER 36.7%, carrier 14.7 dB in 34.7 uHz,  -63.9dB in 2.5kHz.

There was one timing glitch - a backward step of one sample
but it decoded without having to adjust for this.

I will look at Cumiana now!
Paul Nicholson

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