Decoded fine the 20170226 transmission (text send offline to Stefan). the
Eb/N0 is small probably because of some problems with the receiver (it
says that 9984s, or almost 3h were padded), probably because i was messing
with the gps reference signal.
padded 9984.267 seconds at end
initial reference phase -17.4 amplitude 3.223e-01
prep [ 0 0 0 0 0]
found rank 0 ber 4.5991e-01 Eb/N0 -9.0 M -1.204406548e+01 [XXXXXXXXXXX] ps [ 0
0 0 0 0]
carrier phase: -14.9
carrier Eb/N0: 3.9
carrier S/N: 22.24 dB in 24.6 uHz
elapsed 41
VY 73
Jacek / SQ5BPF
On Sun, 26 Feb 2017, DK7FC wrote:
Date: Sun, 26 Feb 2017 12:03:40 +0100
From: DK7FC <[email protected]>
Reply-To: [email protected]
To: [email protected]
Subject: Re: VLF: A weekend for newcomers and advanced newcomers...
Thanks Eddie, Jacek and Paul for the decode.
The message is correct :-)
Alex/RN3AUS will have to search for 3 EbNaut messages now, 8ch, 10ch and 4 ch
:-)
The normal carrier on 8270.005 Hz is still running. It will stay on the air
until the EbNaut message
begins.
The WX forecast looks good so i will try another EbNaut transmission. 12
characters, a critical
value on the path to Moscow but who knows, maybe the QRN is low... We will come
quite close to the
limit!
f = 8270.100000 Hz
Start time: Sunday 26.Feb.2017 18:00:00 UTC
Symbol period: 24 s
Characters: 12
CRC bits: 14
Coding 16K21A
Duration: 8h, 32m, 0s
Antenna current: 700 mA
This is beyond the decode skills of my PC but i assume that many of you will
have a better system
available. Alex has 8 GB RAM at least so it will be possible and i stay at
16K21A.
73, GL, Stefan
Am 26.02.2017 10:16, schrieb g3zjo:
Nice decode of Stefan's Transmission, application for confirmation sent
by PM.
found XXXX
list rank 0
reference phase 0 0 0 0
carrier RMS 5.550e-005 noise RMS 7.109e-006
carrier S/N 17.85 dB in 32.6 uHz
carrier Es/N0 -12.25 dB
carrier Eb/N0 4.27 dB
info bit period 1347.37 seconds
symbol error rate 392/1024 = 38.281 %
Es/N0 from symbol errors -13.5 dB
Eb/N0 from symbol errors 3.0 dB
Shannon capacity 10.0 bits/hour
Shannon efficiency 26.7 %
elapsed 5 seconds
73 Eddie G3ZJO
f = 8270.100000 Hz
Start time: Saturday 25.Feb.2017 20:00:00 UTC
Symbol period: 30 s
Characters: 4
CRC bits: 20
Coding 16K21A
Duration: 8h, 32m, 0s
Antenna current: 700 mA
73, Stefan
|
