Hi Eric, Jay, and all,
On 10/16/2017 8:27 AM, Eric NO3M wrote:
630M opened up to some US Amateurs this past weekend. FT8 may have
killed JT65 / JT9 for the most part on HF, but down on 630 JT9 is still
king. We need to dig deep for weak (5W EIRP) signals amidst harsh
noise, etc. I'd like to request that AP ("a priori") be integrated into
JT9 for additional sensitivity.
Thanks for considering.
73 Eric NO3M
On 10/16/2017 9:00 AM, Jay KA9CFD wrote:
I remember seeing last spring before the FT8 craze some development
work on a new mode called WSPR-LF. Are there any plans to start
development again?
73 Jay KA9CFD
AP decoding capability is not likely to be added to JT9. The whole
concept is not well matched to convolutional codes like the one used in
JT9. A much better prospect for use at MF and LF would be a "slow FT8"
mode with longer transmissions -- say one minute, like JT9. This is
eminently feasible and might be implemented at some point.
Such a mode could be interesting for EME, as well -- where people need
every possible dB of sensitivity but are not always in such a hurry.
We have not forgotten about WSPR-LF, either. Or, maybe, a QSO mode that
uses OQPSK and coherent demodulation.
I hope to have a signal of my own on 472 kHz, before too long!
-- Joe, K1JT
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