Date: Thu, 28 Dec 2017 15:06:57 -0330 (NST)
From: jcraig@mun.ca
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: Re[2]: LF: VLF NA Ebnaut
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Thanks for the kind words, Stefan.  It will take some time to get another
new message so I will just swap the psk3.txt for tonight and send a new 
letter.

  28 Dec. 2100 utc, 16K21A, CRC-8, one character, 544 symbols, 1 minute each,
  8270.0075 Hz.

73
Joe VO1NA

On Thu, 28 Dec 2017, DK7FC wrote:

> Hello Alex, Joe,
>
> Wow! My congratulations. Very impressing!!! A true milestone. Did you think 
> that this will be possible, two years ago? :-)
>
> Joe, i would suggest to try a longer message, like 3 characters, 16K21A, 40 
> second symbols and CRC 16.
> http://abelian.org/ebnaut/calc.php?sndb=12.93&snbws=0.000031&snmps=&code=16K21&sp=40&crc=16&nc=3&submit=Calculate
> This will help to solve doubts with multiple decodes.
>
> Or just try your callsign or another 5 character message with 
> http://abelian.org/ebnaut/calc.php?sndb=12.93&snbws=0.000031&snmps=&code=16K21&sp=30&crc=16&nc=5&submit=Calculate
> You can do it within 5 days or so!
>
> Here i still cannot receive anyone, the tree is still down...
>
> 73, Stefan
>
> Am 28.12.2017 17:10, schrieb jcraig@mun.ca:
>> 
>> Congratulations Alex.  This is the correct letter -- truly amazing!
>> A new letter for tonight if there is no objection.
>> 
>> 73
>> Joe VO1NA
>> 
>> On Thu, 28 Dec 2017, Alex K wrote:
>> 
>>> 
>> Hello Joe, Paul, VLF!
>> It is not easy to believe but I can try now to say: looks like I have 
>> decode of VO1NA 1-char message: "S"!
>> (But may be it is false decode? :-/ )
>> 
>> So this decode taked from individual files of 24 Dec and 26 Dec 
>> transmissions and also from stacking procedure of all seven files without 
>> any other false decodes.
>> Stacking of 24Dec and 26Dec with phase shift 60 deg give me strongest 
>> decode with rank 0:
>> ebnaut-rx V0.7a
>> input file C:\EbNaut\VLF_EBNAUT\VO1NA-dec2017\sum.wav
>> sample rate 0.342935 per second
>> rx frequency 8270.1
>> file start time 2017-12-26 20:32:18.390
>> polynomial 16K21A
>> crc size 8
>> number of chars 1
>> block size 14
>> symbol period 60.000
>> number of symbols 544
>> list length 2000
>> start offset 1672.000
>> freq offset -0.092500
>> cores 1
>> skipped 1670.870573 seconds to start
>> initial reference phase 48.3
>> ---------------------------------------------
>> found S
>> list rank 0
>> reference phase 0 0 0 0
>> carrier S/N 12.20 dB in 30.6 uHz, -32.94 dB in 1Hz, -66.92 dB in 2.5kHz
>> carrier Es/N0 -15.16 dB
>> carrier Eb/N0 4.64 dB
>> info bit period 5726.32 seconds
>> symbol error rate 209/544 = 38.419 %
>> Es/N0 from symbol errors -13.6 dB
>> Eb/N0 from symbol errors 6.2 dB
>> Shannon capacity 2.6 bits/hour
>> Shannon efficiency 24.2 %
>> symbols file C:\EbNaut\VLF_EBNAUT\VO1NA-dec2017\sum-symbols.csv
>> elapsed 7 seconds
>> ---------------------------------------------
>> found S
>> list rank 0
>> reference phase 30 30 0 0
>> carrier S/N 12.62 dB in 30.6 uHz, -32.52 dB in 1Hz, -66.49 dB in 2.5kHz
>> carrier Es/N0 -14.73 dB
>> carrier Eb/N0 5.06 dB
>> info bit period 5726.32 seconds
>> symbol error rate 214/544 = 39.338 %
>> Es/N0 from symbol errors -14.3 dB
>> Eb/N0 from symbol errors 5.5 dB
>> Shannon capacity 2.9 bits/hour
>> Shannon efficiency 22.0 %
>> symbols file C:\EbNaut\VLF_EBNAUT\VO1NA-dec2017\sum-symbols.csv
>> elapsed 78 seconds
>> ---------------------------------------------
>> found S
>> list rank 0
>> reference phase 0 0 -30 -30
>> carrier S/N 12.62 dB in 30.6 uHz, -32.52 dB in 1Hz, -66.49 dB in 2.5kHz
>> carrier Es/N0 -14.73 dB
>> carrier Eb/N0 5.06 dB
>> info bit period 5726.32 seconds
>> symbol error rate 208/544 = 38.235 %
>> Es/N0 from symbol errors -13.4 dB
>> Eb/N0 from symbol errors 6.4 dB
>> Shannon capacity 2.9 bits/hour
>> Shannon efficiency 22.0 %
>> symbols file C:\EbNaut\VLF_EBNAUT\VO1NA-dec2017\sum-symbols.csv
>> elapsed 102 seconds
>> ---------------------------------------------
>> found S
>> list rank 0
>> reference phase 30 0 0 -30
>> carrier S/N 12.93 dB in 30.6 uHz, -32.21 dB in 1Hz, -66.19 dB in 2.5kHz
>> carrier Es/N0 -14.42 dB
>> carrier Eb/N0 5.37 dB
>> info bit period 5726.32 seconds
>> symbol error rate 208/544 = 38.235 %
>> Es/N0 from symbol errors -13.4 dB
>> Eb/N0 from symbol errors 6.4 dB
>> Shannon capacity 3.1 bits/hour
>> Shannon efficiency 20.5 %
>> symbols file C:\EbNaut\VLF_EBNAUT\VO1NA-dec2017\sum-symbols.csv
>> elapsed 318 seconds
>> All files for reprocessing are here: 
>> http://rn3aus.narod.ru/VO1NA-1char.zip
>> 
>> 73 de rn3aus/Alex
>
>