Hi to all, it is true what OPERA mode is "secret", but, I think, it is better than WSPR for semplicity: on-off carrier , no time synchronisation required (then it is possible to made a simple beacon
OPERA "problems" I think clover , packtor and other commercial big $$ modems are also 'private' ? anyone is free to write a dsp decode engine , we have the numeric side ! , the fact that the systems
Hi all, hm, I am just not understanding why we need a "slow WSPR"? In my opinion, WSPR is designed to allow a high channel efficiency, e. g. lots of stations can position their beacons in a very smal
Hi Markus, Thanks for your opinion. OK, i will ask Joe and will forward his answer. Better not to copy his adress simply into CC here ;-) 73, Stefan/DK7FC Hi Stefan, LF, if I remember correctly, Ri
It's a pity that there is no slow-WSPR, e.g. needing 32 minutes or so. If WSPR (2 minutes FSK) is about as efficient as OP8 ( i heared so), then it should be a real alternative to the slow DX modes o
The preferred modes for commercial operators is still CW and MSK on the LF/MF bands. Radio amateurs are trying to re-invent the Wheel only to end up with CW and MSK. Taking everything into considerat
Hi, Question: why do all those professional services for submarines down at LF/VLF use MSK and not any kind of that advanced stuff you are talking about? As far as I know they are using non-linear tr
Hi Stefan, LF, if I remember correctly, Rik's careful evaluaton of SNR performance in February resulted in a threshold for reliable decoding of -23 dB for Opera-2, versus -29 dB for WSPR. This is car
Stefan, Maybe it is worth approaching K1JT with a suggestion/request that a slower version of WSPR be created? It has been several years since WSPR was first released (2008) and there is a lot of sen
''It's a pity that there is no slow-''WSPR'' And a even bigger pity, very few stations would be able to transmit it ! HF wspr and OP 2 modes are broadly similar , remembering , wspr is a peak recodin
Hi Rik, Am 12.09.2012 14:05, schrieb Rik Strobbe: Hello Sabine, as mentioned in the report the test were done off-air, by adding equal amounts of pure white noise to WSPR / Opera signals of identical
