Re: VLF: 8270 March 26/27

[Paul Nicholson <vlf0403@abelian.org>]

I ran about four hours of Roland's 8270Hz carrier into the EbNaut
decoder and got ** with 38 second symbols at Eb/N0 = +1.5 dB
with phase pattern 90 90 60 60 - quite an easy decode.

It even decoded *** with 35 second symbols at Eb/N0 = -2.3 dB,
a genuine decode because there was no false decode with higher
path metric.  Phase was 120 90 90 60.

Those phase patterns say the frequency was a smidgen low, perhaps
due to Doppler.

So, EbNaut messages possible using 1uW over 1Mm exploiting a
two electron signal.

--
Paul Nicholson
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