Detector of the presence of a sequence of FSK modulated signals

Details Detector of the presence of a sequence of FSK modulated signals Detector of the presence of a sequence of FSK modulated signals

1995-09-11

1997-12-23

Bocure, Tesfaldet

Pulse or digital communications

Receivers

Angle modulation

375222, H04L 2714, H04L 516

Patent

active

057013322

ABSTRACT:
A detector of the presence of a sequence of signals modulated by frequency shift keying arriving at a modem, which includes two notch filters each of them receiving the modulated signal and two energy calculation circuits respectively associated with each notch filter, each notch filter having a cut-off frequency corresponding to one of the frequencies of the frequency shift keying.

REFERENCES:
patent: 3836726 (1974-09-01), Wells et al.
patent: 3890461 (1975-06-01), Vogelman et al.
patent: 5309476 (1994-05-01), Murray et al.
patent: 5337332 (1994-08-01), Yaguchi et al.

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