I presented this talk at the 2019 RSGB convention on 13th October 2019 at Milton Keynes. It is more of a polemic and call-to-arms to work on ways to push the limits of VHF/UHF/SHF weak-signal communications in the way the LF enthusiasts have, working with Eb/N0 very VERY close the the theoretical limit, but we are up against stochastic processes which spread troposcatter and other DX propagation modes on the sub-metre wavelengths and make the LF approaches less than useful.
I am calling for the implementation of an adaptive feedback channel using perhaps 146 or 71MHz datacomms, perhaps New Packet Radio or something dedicated, to give us a way to close the loop and modify transmit parameters on the fly. This is not going to be easy, but it could be a nice challenge. It also might fit the Ofcom criterion of “Not just more of the same” on the new allocations.
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