Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz

[Paul Nicholson <vlf0403@abelian.org>]

Even more aggressive sferic blanking raises
the decode to Eb/N0 +1.7 dB BER 38.2%
S/N 16.10 dB in 25.4 uHz.

Using around 50% of the channel capacity.

The carrier S/N is about 1.6 dB weaker than
expected for that Eb/N0.

> Would you think a 11 character message will decode?

Yes, with the same signal and noise, it would decode
at about +0.8 dB... if the terminator doesn't mess
things up.

> Can you provide a bit error image (you know what i mean)

 http://abelian.org/vlf/tmp/161102a.gif

There are 1312 transmitted symbols, 30 seconds each.
Each red line indicates a symbol received in error, there
are 502 of these.

--
Paul Nicholson
--