Hi Adrian,
Just for completeness, the modem we are planning on using for
FreeDV-over-analog-FM, is more like ASK+Manchester Encoding over FM. We're
calling it FMFSK or MEFSK because it ends up looking like a dirty FSK over
the air. The mod works by Manchester encoding the bits and firing them
Hi Adrian,
Great work - you should write it up (or YouTube). What noise (channel)
bandwidth are your SNRs measured in? Are all the modems tested below
measured using the same bit rate?
That's why Eb/No is useful - it's normalized to a bandwidth of 1Hz and
bit rate of 1 bit/s. It's like the
Hi all,
Motivated by David's work with VHF modems, I have started to
investigate various Tx-Rx chains that might work with legacy narrow FM
radios. My goal is to develop a completely portable system composed of
a development board running open-source software paired with an FM
transceiver. The
