Message-ID: <5A451B0C.6080902@posteo.de>
Date: Thu, 28 Dec 2017 17:25:48 +0100
From: DK7FC <selberdenken@posteo.de>
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To: rsgb_lf_group@blacksheep.org
References: <2dbcd2a8-0109-41e4-c0ca-aada17f54de8@abelian.org> <72b92016-13ba-d45d-61c3-d54f6c9c530f@abelian.org> <5A44C2CA.6020004@posteo.de> <1514476246.406500938@f372.i.mail.ru> <Pine.LNX.4.64.1712281238060.13405@plato.ucs.mun.ca>
In-Reply-To: <Pine.LNX.4.64.1712281238060.13405@plato.ucs.mun.ca>
Subject: Re: LF: Re[2]: LF: VLF NA Ebnaut
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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