Radio receiver for frequency shift keyed signals

Details Radio receiver for frequency shift keyed signals Radio receiver for frequency shift keyed signals

1982-07-01

1984-07-24

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

329104, 329112, H04L 2714

Patent

active

044621078

ABSTRACT:
A radio receiver for frequency shift keyed signals of the zero I.F. type. The quadrature outputs of mixers are low-pass filtered and a 90.degree. phase shift at the baseband frequency is introduced in one signal path. The baseband signals are then fully limited and applied to a logic network to provide a digital output indicative of the relative lead/lag condition of the two signal paths. The logic network can conveniently be an EXCLUSIVE-OR gate.

REFERENCES:
patent: 3500217 (1970-03-01), Allen
patent: 3619785 (1971-11-01), Farrow
patent: 4156194 (1979-05-01), Mueller
patent: 4193034 (1980-03-01), Vance
patent: 4254503 (1981-03-01), Vance
patent: 4322851 (1982-03-01), Vance

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