Quadrature modulation arrangement with enhanced dynamic amplific

Details Quadrature modulation arrangement with enhanced dynamic amplific Quadrature modulation arrangement with enhanced dynamic amplific

1980-04-04

1983-05-17

Chin, Tommy P.

Telecommunications

Transmitter and receiver at separate stations

Single message via plural carrier wave transmission

367135, 370 20, H04B 120, H04B 1100, G01R 2314

Patent

active

043843646

ABSTRACT:
A quadrature modulation analog transmission system provides an extended dynamic range of amplification by dividing the total gain desired between the two quadrature channels without overloading the transmission medium. The direct channel furnishes a higher gain for low-level background noise signals, while the quadrature channel furnishes a lower gain for high-level signaling tones.

REFERENCES:
patent: 3289082 (1966-11-01), Shumate
patent: 3443229 (1969-05-01), Becker
patent: 3518680 (1970-06-01), McAuliffe
patent: 3656097 (1972-04-01), Massa
patent: 3732375 (1973-08-01), Kuribayashi
patent: 3757288 (1973-09-01), Morin
patent: 4187493 (1980-02-01), Patterson
patent: 4267591 (1981-05-01), Wissel

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