I notice the cohpsk_frame_design.ods file has:
Excess BW factor 1.5
> Carrier bandwidth 187.5
> Total signal bandwidth 1312.5
> Diversity factor 2
> Total BW with diversity 2625
187.5 Hz BW, but then in the software, a much narrower BW is produced.
Notch to notch looks like about 111 Hz.
When you view the audio spectrum it is only about 1500 Hz BW total with 14
carriers, and about 750 Hz without
diversity. It doesn't look crushed together though. Nice notches between
carriers.
I would guess maybe .43 excess, and 111 Hz carrier bandwidths.
Disclaimer: I have an art degree :-)
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