Hi Paul, VLF,
Am 21.08.2017 18:48, schrieb Paul Nicholson:
> f = 4470.005000 Hz
> Start time: 22.August.2017 04:00:00 UTC
> Symbol period: 60 s
> Characters: 5
> CRC bits: 6
> Coding 16K21A
With this transmission, the optimum decoder list length will
be about 40 for a full phase search, or about 120 if you
decide the phase is constant enough to restrict the search
to uniform phases.
Hahaa you changed the calculator website now! ;-) I just wanted to
reproduce the settings,
http://abelian.org/ebnaut/calc.php?sndb=16&snbws=0.000031&snmps=&code=16K21&sp=60&crc=6&nc=5&submit=Calculate
and now i saw other values and two lines describing the optimum list
length more detailed. That is helpful.
In my EbNaut decode attempts i used a larger list length than
recommended in the past but Markus alsways seems to use 20000 which
will lead to many false decodes if the optimum length would be 9
actually. This can be problematic when using 2...3 characters.
All right now.
Am 21.08.2017 22:15, schrieb Paul Nicholson:
Two days stacked, 20th+21st 07:00 to 19:00.
http://abelian.org/vlf/tmp/170821b.gif
12.5 dB in 23.1 uHz, a little over 4 sigma.
Wow, that peak is so nice and sharp that i decided to run the carrier
for another day so you can stack 3 days. The EbNaut message will
then start tomorrow 04:00:00.3 UTC.
73, Stefan
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