On the implementation of a 32-channel FFT-based MFSK demodulator

This paper discusses the implementation of an M-ary FSK demodulator based on the FFT process. The goal was to design an hybrid receiver where the front end is still analog up to the A/D subsystem (I and Q), the rest being entirely digital. A digital implementation offers many advantages over an analog counterpart, e.g. SAW decoders, such as flexibility and improved dynamic range. The paper discusses the design and implementation of a 32-channel 8-FSK FFT-based demodulator where the signal bandwidth is in the excess of 10 MHz.<
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