Digital FFSK demodulator

Details Digital FFSK demodulator Digital FFSK demodulator

1993-10-22

1994-12-13

Grimm, Siegfried H.

Demodulators

Frequency shift keying or minimum shift keying demodulator

329302, 375 80, 375 88, H04L 2714

Patent

active

053732464

ABSTRACT:
A digital fast frequency shift keying (FFSK) demodulator for demodulating an FFSK signal having components at first and second frequencies f0 and f1. The FFSK signal is sampled and the samples are processed in an arrangement which includes a monostable function (50) and a digital notch filter (51) for distinguishing between the components to provide a demodulated output. The digital notch filter (51) is arranged to filter out frequencies which are multiples of the frequencies f0 and f1.

REFERENCES:
patent: 4384357 (1983-05-01), deBuda et al.
patent: 4561098 (1985-12-01), van Tol
Product Data Sheet for FX419 of Consumer Microelectronics Ltd., Nov. 1986.
Laboratoriet for Akustik, Sep. 1986, pp. 18 and 19.

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