FSK demodulator using goertzel's discrete fourier transform

Details FSK demodulator using goertzel's discrete fourier transform FSK demodulator using goertzel's discrete fourier transform

1997-06-17

1998-10-06

Grimm, Siegfried H.

Demodulators

Frequency shift keying or minimum shift keying demodulator

375324, 375334, H04L 2748

Patent

active

058182969

ABSTRACT:
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.

REFERENCES:
patent: 4612509 (1986-09-01), Betts et al.
patent: 4726041 (1988-02-01), Prohaska et al.
patent: 5287516 (1994-02-01), Schaub

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