A three character message "UFB", transmitted by Stefan Schaefer
(DK7FC) at JN48ik, has been received at QE37pd a distance of 16778
km.
The message was encoded and decoded using the EbNaut software by
Paul Nicholson. http://www.abelian.org/
Spectrum Lab software by Wolfgang "Wolf" Buescher (DL4YHF) was
used to capture the data. https://www.qsl.net/dl4yhf/spectra1.html
Software provided by Markus
Vester (DF6NM) was used to normalise and stack the data to be
decoded. http://www.df6nm.de/
The result was obtained by stacking the data files received
during the 21 st and 26 th of September.
The receiving set-up used a 1m x 28 mm diameter aluminium whip at
9m with a FET buffer.
A Steinberg UR242 Audio Interface and ASUS note book were used to
capture the data files.
Thank you to Stefan, who made this result possible.
Regards, Edgar
Moonah, Tasmania.
ebnaut-rx V0.9a
input file sum.wav
sample rate 1.736106 per second
rx frequency 17470.1
file start time 2018-09-26 15:44:22.080
polynomial 16K21A
crc size 19
number of chars 3
block size 37
symbol period 10.000
number of symbols 912
start offset 13538.5000
freq offset 0.000040
cores 2
list length 202670
skipped 13538.343857 seconds to start
initial reference phase -57.1
---------------------------------------------
found K:;
list rank 112878
reference phase -150,-150,-150,-150
carrier S/N 11.08 dB in 109.6 uHz, -28.52 dB in 1Hz, -62.50 dB in
2.5kHz
carrier Es/N0 -18.52 dB
carrier Eb/N0 -1.25 dB
info bit period 533.33 seconds
symbol error rate 393/912 = 43.092 %
Es/N0 from symbol errors -18.1 dB
Eb/N0 from symbol errors -0.8 dB
Shannon capacity 7.2 bits/hour
Shannon efficiency 93.1 %
symbols file sum-symbols.csv
elapsed 78 seconds
---------------------------------------------
found UFB
list rank 48796
reference phase -120,-120,-120,-120
carrier S/N 11.26 dB in 109.6 uHz, -28.34 dB in 1Hz, -62.31 dB in
2.5kHz
carrier Es/N0 -18.34 dB
carrier Eb/N0 -1.07 dB
info bit period 533.33 seconds
symbol error rate 409/912 = 44.846 %
Es/N0 from symbol errors -20.7 dB
Eb/N0 from symbol errors -3.4 dB
Shannon capacity 7.6 bits/hour
Shannon efficiency 89.2 %
symbols file sum-symbols.csv
elapsed 150 seconds
---------------------------------------------
found UFB
list rank 70200
reference phase -150,-150,-120,-120
carrier S/N 11.78 dB in 109.6 uHz, -27.82 dB in 1Hz, -61.80 dB in
2.5kHz
carrier Es/N0 -17.82 dB
carrier Eb/N0 -0.55 dB
info bit period 533.33 seconds
symbol error rate 404/912 = 44.298 %
Es/N0 from symbol errors -19.8 dB
Eb/N0 from symbol errors -2.5 dB
Shannon capacity 8.5 bits/hour
Shannon efficiency 79.3 %
symbols file sum-symbols.csv
elapsed 487 seconds
---------------------------------------------
found UFB
list rank 38087
reference phase -120,-120,-90,-90
carrier S/N 11.78 dB in 109.6 uHz, -27.82 dB in 1Hz, -61.80 dB in
2.5kHz
carrier Es/N0 -17.82 dB
carrier Eb/N0 -0.55 dB
info bit period 533.33 seconds
symbol error rate 409/912 = 44.846 %
Es/N0 from symbol errors -20.7 dB
Eb/N0 from symbol errors -3.4 dB
Shannon capacity 8.5 bits/hour
Shannon efficiency 79.3 %
symbols file sum-symbols.csv
elapsed 552 seconds
---------------------------------------------
found UFB
list rank 14516
reference phase -150,-120,-120,-90
carrier S/N 12.03 dB in 109.6 uHz, -27.56 dB in 1Hz, -61.54 dB in
2.5kHz
carrier Es/N0 -17.56 dB
carrier Eb/N0 -0.30 dB
info bit period 533.33 seconds
symbol error rate 407/912 = 44.627 %
Es/N0 from symbol errors -20.3 dB
Eb/N0 from symbol errors -3.0 dB
Shannon capacity 9.0 bits/hour
Shannon efficiency 74.8 %
symbols file sum-symbols.csv
elapsed 1624 seconds
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