Transmitter/receiver system

Details Transmitter/receiver system Transmitter/receiver system

1984-12-04

1987-04-21

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

34082573, 34082575, 375 97, 324 77E, H03M 700

Patent

active

046602151

ABSTRACT:
A transmitter/receiver system for converting digital information into a multi-frequency signal for transmission. A reference frequency signal is first transmitted, then a series of frequencies having information indicative of differences with the reference signal are transmitted, and a receiver discriminates differences with the reference frequency signal to decode the information.

REFERENCES:
patent: 3866124 (1975-02-01), Wykoff
patent: 3990071 (1976-11-01), Ito et al.
patent: 4045767 (1977-08-01), Nishihara et al.
patent: 4291269 (1981-09-01), Nossen
patent: 4306308 (1981-12-01), Nossen

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