Suppressed carrier automatic gain control circuitry

Details Suppressed carrier automatic gain control circuitry Suppressed carrier automatic gain control circuitry

1976-01-05

1977-09-13

Griffin, Robert L.

325 49, 325408, 325419, 325476, H04B 168

Patent

active

040485668

ABSTRACT:
An automatic gain control (hereinafter referred to as AGC) circuitry is used in conjunction with a Costas loop detector to provide positive gain control during the acquisition and tracking modes of the operation of a receiver. The circuitry includes circuitry for deriving a noise estimate signal from one channel of the Costas loop and circuitry for subtracting the noise estimate signal from the data and noise signal combination in the other channel of the Costas loop for providing the automatic gain control signal to prevent false locking.

REFERENCES:
patent: 3005094 (1961-10-01), Taylor
patent: 3084329 (1963-04-01), Clay
patent: 3611145 (1971-10-01), O'Connor

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