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Jest takie zdanie, którego nie mogę "przetrawić"...[...] To decode FSK, you need to delay the incoming signal by half a bit-period (the easy bit) and then low-pass filtering the result (the hard bit). At the end of the process the resulting signal is passed through a bit-slicer to determine the logic level of the original bit. In this case, the input signal is a unipolar 8-bit sample but this is promoted to a signed 16-bit result; otherwise, signal-to-noise issues swamp the filter. Internally, the filter uses 16-bit signed scaled values; temporary accumulators and multiplication results are 32 bits.
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O co chodzi z tym "easy bit" i "hard bit" ?
Pozdrawiam