[hfsig] Some basic FSK questions

[Ben Mesander]

Hi,

  I have a couple of questions related to a HF demodulator I am
working on. If these questions are more appropriate for another forum,
please let me know.

  For an FSK demodulator that works on an FSK signal that was
transmitted with unshaped pulses (rectangular in the time domain),
what is the best filter to demodulate with to minimize noise/ISI?

  For a synchronizer that uses a squaring nonlinearity, what is a
good criteria for designing the bandpass filter?

Thanks,
Ben