Power line communication system utilizing a local oscillator

Details Power line communication system utilizing a local oscillator Power line communication system utilizing a local oscillator

1981-03-30

1985-08-27

Groody, James J.

Communications: electrical

Systems

Selsyn type

329122, 331 1A, 332 16R, 375 65, H04B 354, H03D 300, H03C 300

Patent

active

045381364

ABSTRACT:
Disclosed is a power line transmission system which generates a narrow band multi-frequency shift keyed signal having a first predetermined frequency representing a first state of information (e.g., a "0") and a second predetermined frequency representing a second state of information (e.g., a "1"). The system includes a power line connected between a transmitter and a receiver and the FSK narrow band signal is transmitted from the transmitter over the power line to the receiver which recovers the transmitted information. The system provides improvement over noise problems present in a power line and in addition provides multi-channel capability.

REFERENCES:
patent: 3626311 (1971-12-01), Kraybill
patent: 3731233 (1973-05-01), Hutchinson
patent: 3794928 (1974-02-01), Stump et al.
patent: 4068199 (1978-01-01), Madoff
patent: 4091361 (1978-05-01), Eichelberger et al.
patent: 4092599 (1978-05-01), Yee et al.
patent: 4234852 (1980-11-01), McCorkle
patent: 4316151 (1982-02-01), Ooms
patent: 4330758 (1982-05-01), Swisher et al.
patent: 4367542 (1983-01-01), Du Broff

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