M-FSK Demodulator with Doppler shift

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Al am 15 Feb. 2019

Dear all Mathworks staff,

I am trying to simulate Doppler Shift on M-FSK modulation.

I faced a weird result: the output bits are flipped for some special Doppler shifts!!!

I do not know anything more than the demodulato algorithm is just noncoherent.

I attach a simpler simulink file.

regards,

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R2015a

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