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After a BPSK modulation we have the upsampling and the pulse shaping filter. But for a FSK, do we have upsampling and pulse shaping filter, or just the pulse shaping filter?

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    $\begingroup$ In a modern implementation you would create the FSK signal in discrete time at a low intermediate frequency, then upconvert to RF in the analog front end. $\endgroup$ – MBaz Nov 8 '20 at 17:31
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Most likely yes. FSK is already generated using many samples per symbol. Look at Matlab fskmod function.

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