Stefan and Paul,
Nice work!
A technical question: I notice ~ 9dB lower Eb/N0 than the 1-character December
28th result (in Todmorden and Bielefeld); is this essentially from an
approximately 12x increase in character rate?
Or does the symbol period independently also affect Eb/N0 in this case?
73,
Jim AA5BW
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Paul Nicholson
Sent: Wednesday, January 3, 2018 6:06 AM
To: [email protected]
Subject: Re: VLF: Finally back on the 58 km band...
Stefan wrote:
> f = 5170.1000 Hz
> Start time: 29.Dec.2017 15:00:00 UTC > Symbol period: 30 s > Characters:
> 12 > CRC bits: 20 > Coding 16K21A > Duration: 14:56 [hh:mm]
Todmorden (881.2 km)
--------------------
29/30 Eb/N0 +2.8 dB, S/N -26.2 dB/1Hz, phase 46.1 *Decoded*
30/31 Eb/N0 +4.1 dB, S/N -24.9 dB/1Hz, phase 44.2 *Decoded*
31/01 Eb/N0 +1.8 dB, S/N -27.1 dB/1Hz, phase 43.2 *Decoded*
01/02 Eb/N0 +1.5 dB, S/N -27.5 dB/1Hz, phase 57.6 *Decoded*
02/03 Eb/N0 -1.6 dB, S/N -30.6 dB/1Hz, phase 60.6;
Bielefeld (303.8 km DL4YHF)
---------------------------
29/30 Eb/N0 +8.6 dB, S/N -20.4 dB/1Hz, phase -53.5 *Decoded*
30/31 Eb/N0 +8.3 dB, S/N -20.6 dB/1Hz, phase -52.1 *Decoded*
31/01 Eb/N0 +8.1 dB, S/N -20.8 dB/1Hz, phase -56.3 *Decoded*
01/02 Eb/N0 +8.4 dB, S/N -20.6 dB/1Hz, phase -47.9 *Decoded*
02/03 Eb/N0 +4.0 dB, S/N -24.9 dB/1Hz, phase -38.1 *Decoded*
Warsaw (919.3 km SQ5BPF)
------------------------
29/30 Eb/N0 -5.4 dB, S/N -34.4 dB/1Hz, phase -20.3;
30/31 Eb/N0 -17.2 dB, S/N -46.2 dB/1Hz;
31/01 Eb/N0 -7.8 dB, S/N -36.8 dB/1Hz, phase -44.2;
01/02 Eb/N0 -6.1 dB, S/N -35.1 dB/1Hz, phase -36.1;
02/03 Eb/N0 -8.2 dB, S/N -37.1 dB/1Hz, phase 2.9;
Five stacked: Eb/N0 -2.1 dB
Cumiana (504.6 km IK1QFK)
-------------------------
29/30 Eb/N0 -5.4 dB, S/N -34.3 dB/1Hz, phase 176.7;
30/31 Eb/N0 -1.3 dB, S/N -30.3 dB/1Hz, phase -176.2;
31/01 Eb/N0 -4.9 dB, S/N -33.9 dB/1Hz, phase 177.4;
01/02 No data from rx site, ADSL fault;
02/03 No data from rx site, ADSL fault;
Three stacked: Eb/N0 1.1 dB *Decoded*
--
Paul Nicholson
--
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