FSK demodulator using goertzel's discrete fourier transform

摘要

A frequency shift keyed demodulator system employs a first bandpass filter having a passband centered at a first frequency; a second bandpass filter having a passband centered at a second frequency; a first Goertzel's discrete Fourier transform processor coupled to an output of the first bandpass filter; a second Goertzel's discrete Fourier transform processor coupled to an output of the second bandpass filter; and an adder coupled to an output of the first Goertzel's discrete Fourier transform processor, and to an output of the second Goertzel's discrete Fourier transform processor.