Re: LF: VO1NA received my EbNaut

[Paul Nicholson <vlf0403@abelian.org>]

Well done with this - a great result and close to the limit.

A distance of 4555km.

> 12110608_result.png
> 12110608_sym.png

Always fascinating to see a message decoded from a signal that
is quite invisible.   No trace of the squared carrier or any
sign of an axis to the symbol plot, so impossible to extract
a reference phase.

This is a good use of EbNaut - it needed both list decoding
and a full reference phase search.  S/N was about -48dB in
audio bandwidth.  I don't know if any other mode could have
got a message through.

There is probably some other signal within the bandwidth of the
wav file, hence the -4dB Eb/N0 estimate from the carrier S/N.
Usually the carrier derived Eb/N0 is more accurate than the
Eb/N0 estimated from the BER, but not so when the input file
contains other signals.

--
Paul Nicholson
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