Radio frequency signal transmission system with carrier frequenc

Telecommunications – Transmitter and receiver at same station

Patent

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Details

455 86, 455 87, 455103, 455104, H04B 150

Patent

active

047618213

ABSTRACT:
A radio frequency transmitter simultaneously transmits both a local oscillator frequency and that frequency modulated by an information content signal. A receiver receives a carrier wave that is at the opposite edge of a channel from that of the local oscillator. The transmitted and received information signals can be of opposite type sidebands.

REFERENCES:
patent: 1458949 (1923-06-01), Nichols
patent: 1818669 (1931-08-01), Beckmann
patent: 2388906 (1945-11-01), Corderman
patent: 3041450 (1962-06-01), Parker
patent: 4186344 (1980-01-01), Higuchi et al.

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