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A comment on Signal Identification Wiki. Parent comment

Re:Signal Identification Wiki by vdqtp3 on Friday October 13, 2023 @02:55PM (#37874141)
So how would they fare against something below the noise floor, like FT8
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Re:Signal Identification Wiki by trothamel on Friday October 13, 2023 @03:02PM (#37874218)
FT8 isn't actually below the noise floor if you look at the bandwith the signal is detected in, rather than the 2500 Hz reference bandwidth.

https://tapr.org/pdf/DCC2018-KC5RUO-TheReal-FT8-JT65-JT9=SNR...

Has details, but basically you should add 26 dB to account for the difference between 2500 Hz and the 6.25 Hz bandwidth each FT8 tone is detected in.

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