https://www.mathworks.com/help/phased/ref/mfskwaveform.html
MFSK Waveform - Multiple frequency shift keying (MFSK) continuous waveform - Simulink
The MFSK Waveform block generates a multiple frequency-shift keying (MFSK) continuous waveform with a specified step time, sweep bandwidth, frequency offset,...
mfskwaveformmultiplefrequencyshift
https://www.sigidwiki.com/wiki/CIS_W-MFSK-17
CIS W-MFSK-17 - Signal Identification Wiki
Presumably Russian MFSK signal with wide bandwidth and 17 tones
ciswmfsksignalidentification