LF: <Tech> PSK Tx solution?

["Mike Dennison" <mike.dennison@rsgb.org.uk>]

M0BMU wrote:
> There seems to be some potential for BPSK modulation methods 
> on LF, but the big difficulty is generating a TX signal with 
> acceptable sidebands
I may be way off beam here but can we do anything with FSK? My 
understanding is that for voice transmissions NBFM and phase mod are 
differently achieved but result in roughly the same mathematics so can be 
demodulated as if they were identical.
In the same way, can we achieve the same effect as PSK by doing something 
with the frequency instead? If so, linearity is not an issue.



Mike, G3XDV (IO91VT)
http://www.lf.thersgb.net