Explain how the FSK signal and output signals are converted using synchronous demodulation.
What will be an ideal response?
In the synchronous demodulation, the FSK signal will be divided into two separate signals with frequency of f1 (lower channel or space) and f2 (upper channel or mark) and two local oscillators are used to demodulate these two signals synchronously. The output signals of the demodulators will pass through a low-pass filter and then feeds to a decision-making circuit. The decision-making circuit will examine the two modulated signals and selects the signal that is most likely one of the input signal. The decision-making circuit will also reshape the selected signal to be in its original shape.
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