Re: LF: LF and JT65

[Marek SQ5BPM <sq5bpm@wp.pl>]

G0MRF@aol.com wrote:

> Forwarded on behalf of Andy Talbot G4JNT
>  
> Re JT65 and LF
> [...]
>
> Some years ago, Alberto introduced us to Jason, but even that is an
> incoherent mode and doesn't make the most of the LF path.  But if the 
> error
> correction capabilities of JT65, were used with a reduced synchronisation
> vector allowed for by better frequency accuracy, and with the tone / 
> symbol
> spacing of Jason we may be geting something formidable.
>
>     BUT it is still incoherent.[...]
Some time ago I sent to the group information about Olivia mode, which 
already uses an interesting error correction scheme. This mode could be 
possibly re-worked for much lower bandwidth and throughput, some extra 
possibilities of coherent reception could be added as well. Subsequent 
tones do not need to overlap as they do in original Olivia, if it's to 
be used with non-linear power amplifiers.
One could also start with Jason and add the error correction used in 
Olivia...
73! Marek SQ5BPM