Broadband quadrature phase modulator for control loop error gene

Details Broadband quadrature phase modulator for control loop error gene Broadband quadrature phase modulator for control loop error gene

1983-05-26

1985-07-09

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Plural receivers

455304, H04B 116, H04B 702

Patent

active

045286973

ABSTRACT:
Circuitry for use in an IF combiner, where main and diversity receiver path signals are combined. The circuitry generates an error signal for the purpose of controlling the phase of one of these signals by deriving a broad-band phase-modulated feedback path version of the signal. No modulation is introduced into the message channel. The feedback path version of the signal is quadrature modulated and combined with signals from the main and diversity receiver paths to generate an error signal providing maximum control loop sensitivity.

REFERENCES:
patent: 3835392 (1974-09-01), Mahner et al.
patent: 4079318 (1978-03-01), Kinoshita
patent: 4261056 (1981-04-01), Barnett et al.
patent: 4334316 (1982-06-01), Tanaka
patent: 4354276 (1982-10-01), Karabinis

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