Hi Marcus & group,
1. WOLF is using cosine-shaped zero-crossings with a risetime of only 5 ms,
which causes a few extra sidebands on each side of the spectrum. I'd prefer
to extend the cosine-envelope to the full symbol duration (like in PSK31),
then ideally only the 10 Hz wide main spectral lobe would persist. At a
PEP level and with 50% phase transitions, on average we'd lose only 0.8 dB
SNR while saving 24% transmitted energy.
You are right about the average value, but for a '0101' sequence the signal
will be 3dB down. And as it is of very little use if you can decode
sequences like '111000111' but you cannot decode a '010101010' sequence I
believe that that the effective loss of SNR is 3dB, even if the average
power is only 0.8dB down.
73, Rik ON7YD