Hi, I have three questions about an FSK modem. 1. When - and when not - is carrier frequency estimation necessary for FSK demodulation? When it is required, how should we do that? Note that it's different than phase recovery that is done for coherent demodulators.
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2. For coherent demodulation, how can phase be recovered in FSK case? So for example, how to design a PLL phase detector in that case? Is there some feedforward scheme as well? 3. How to implement an equalizer for FSK modulated signals? Appreciate your help. Cheers, Qasim
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