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Complex IF 2 level FSK Demodulation

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honigal

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Hi All,

Correct me if I'm wrong but from my calculation in order to demodulate FSK signal one needs to calculate:

1. num = I(n-1)*Q(n) - I(n)*Q(n-1)
2. bit_out = sign(num)

could it be that simple?

Alex
 

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