Hello Alex,
Very nice! Congrats again to that result, 5 characters over such a
distance, i think is is beyond of what i've expected what's possible on
that path. :-)
A time offset of 14184 seconds. Instead of 15_FEB_2251_8270-1pps.txt
it would be interesting to try 16_FEB_0221_8270-1pps.txt where the time
offset is just 1584 seconds. It would be interesting to see if the
Eb/N0 is the same or better.
Can you provide the txt file and sr file via the reflector? There are
some OMs in the background who need something as a turorial, EbNaut
newcomers :-) The file size is small enough.
I'm planning further transmissions for the weekend...
73, Stefan
Am 16.02.2017 17:09, schrieb Alex K:
Hello VLF, Stefan!
Easy and fast decode! Wow!
I make some improvements by switching off MIC gain. Now sound input is
not overloaded at night time...
Grabber will run to Monday or longer, I will visit it for results at
Monday.
73!
ebnaut-rx V0.5
input file
C:\EbNaut\VLF_EBNAUT\EbNaut\ebnaut15_FEB_2251_8270-1pps.wav
sample rate 0.342935 per second
rx frequency 8270.1
file start time 2017-02-15 16:13:47.290
polynomial 8K19A
crc size 16
number of chars 5
block size 46
symbol period 60.000
number of symbols 512
list length 20000
start offset 14184.674
freq offset 0.000000
cores 1
skipped 14183.445843 seconds to start
initial reference phase 5.3
---------------------------------------------
found DL-RU
list rank 3151
reference phase 180 180 180 180
carrier RMS 2.988e-005 noise RMS
5.866e-006
carrier S/N 14.14 dB in 32.6 uHz
carrier Es/N0 -12.95 dB
carrier Eb/N0 -0.41 dB
info bit period 1077.89 seconds
symbol error rate 208/512 = 40.625 %
Es/N0 from symbol errors -15.5 dB
Eb/N0 from symbol errors -3.0 dB
Shannon capacity 4.3 bits/hour
Shannon efficiency 78.1 %
symbols file
C:\EbNaut\VLF_EBNAUT\EbNaut\ebnaut15_FEB_2251_8270-1pps-symbols.csv
elapsed 8 seconds
---------------------------------------------
found DL-RU
list rank 363
reference phase 180 180 -150 -150
carrier RMS 3.088e-005 noise RMS
5.866e-006
carrier S/N 14.43 dB in 32.6 uHz
carrier Es/N0 -12.67 dB
carrier Eb/N0 -0.12 dB
info bit period 1077.89 seconds
symbol error rate 202/512 = 39.453 %
Es/N0 from symbol errors -14.4 dB
Eb/N0 from symbol errors -1.9 dB
Shannon capacity 4.6 bits/hour
Shannon efficiency 73.2 %
symbols file
C:\EbNaut\VLF_EBNAUT\EbNaut\ebnaut15_FEB_2251_8270-1pps-symbols.csv
elapsed 97 seconds
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