Got that one. Eb/N0 = 1.2dB calculated from 31.3% BER. Measured carrier S/N gives Eb/N0 = 1.2dB also. Constant phase. Decode time 13 seconds. 55% of channel capacity. The S/N corresponds to -53dB in
I made three WAV files suitable for input to ebnaut-rx (the header contains frequency and time info). All files begin 02:59:00 and decode with a start offset of 60.00 Various sample rates and file si
No it was some CW, here's the tail end of it 10 mins or so before I started transmitting at 21:58 http://abelian.org/tmp/137700Hz_160313_2201.jpg I couldn't make any sense from the Morse. -- Paul Nic
Oh, I just looked at your screenshot Gary. So that's what Opera looks like. I thought it was Morse code, no wonder I couldn't read it! It doesn't take up much bandwidth does it? How many Hz away do I
Stefan and Markus, thanks very much for the reports! A nice result from Heidelberg and you did a full phase search in 15 degree steps! I think I've reached all the stations equiped for coherent recep
Thanks Markus, perhaps there's a sample offset error in the pipeline somewhere. I reproduced the same result with the Linux decoder too: needs T offset +1 to get 1.2 dB when using the 1s/s signal. An
I tried the long wire at ELF - it was useless. No Schumann and it can't see transients from TLEs. In fact it was pretty poor at VLF which probably shows how well it couples to the trees. So, not a ve
A pal at Uni (quite a party animal) often used to say - if anything's worth doing, it's worth doing to extremes. I've often taken that as sound advice. Indeed yes, and I think I received a little sig
I found what I was looking for in Roger Lapthorn's notes on earth mode at https://sites.google.com/site/sub9khz/earthmode where he mentions that licencing is not required. However he is talking about
And both came in ok here, 07:10:02 Eb/N0 = 2,0 dB from BER 33.8%, carrier 2.6 dB; 09:00:02 Eb/N0 = 1.7 dB from BER 34.2%, carrier 1.1 dB; Your messages almost always decode here, a very reliable sign
The phase doesn't look very steady Markus. Below are 10 minute averages, stepping 5 mins and the timestamp is the start time of each window. 2016-03-20_10:30:00 0.02 fT -94.4 deg 2016-03-20_10:35:00
You're right. I confirmed this by injecting an artificial carrier into the VLF recording at 8271.0025 at the same average strength as your signal, then running this signal through the same process. T
Roland schrieb: Das ist eine gute Herausforderung In der Bandbreite 25.25 uHz habe ich dieses Ergebnis von 18.00 bis 05.00 Uhr. http://abelian.org/vlf/tmp/160327a.gif Signal ist maximal auf Orientier
Heute (2016-03-28) habe ich http://abelian.org/vlf/tmp/160328a.gif In der Nacht vor gestern die statistische Signifikanz war nur 3.9 sigma. Heute war es 5.0 sigma - ich kann einen erfolgreichen Empfa
Looks like there's something there, but nothing showing on Markus' receiver http://www.df6nm.darc.de/vlf/vlfgrabber.htm I'll take a look here in narrow bandwidth. It would be very nice to receive mor
I ran about four hours of Roland's 8270Hz carrier into the EbNaut decoder and got ** with 38 second symbols at Eb/N0 = +1.5 dB with phase pattern 90 90 60 60 - quite an easy decode. It even decoded *
Good luck with that Uwe. For 2 char messages with 16 bit CRC, the max useful list length is probably around 1k but I don't yet know where the optimum is. Beyond a certain length (corresponding to nea
Quite a coincidence, or maybe something more subtle. GL differs from the correct message in 186 of the 368 symbols, so it is not a near miss in terms of hamming distance. Curious. -- Paul Nicholson -
