Receiver for phase shift modulated carrier signals

Details Receiver for phase shift modulated carrier signals Receiver for phase shift modulated carrier signals

1985-02-04

1987-02-03

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375119, 331 1A, 328155, H04L 2706

Patent

active

046413251

ABSTRACT:
Method and apparatus are disclosed for providing a local oscillator signal which is in phase and frequency synchronism with a carrier signal wherein the frequency of the carrier is a constant multiple of the frequency of a reference waveform. A phase detector detects the phase of the local oscillator relative to the carrier and provides a signal to a microprocessor indicative of this phase. The microprocessor provides the local oscillator and responds to a reference waveform threshold detector to determine the number of local oscillator pulses provided during one cycle of the reference and to maintain this number to equal the constant multiple. The microprocessor further responds to the phase detector to adjust the phase of the local oscillator and thereby maintain phase synchronism with the carrier.

REFERENCES:
patent: 4011516 (1977-03-01), Heimbigner et al.
patent: 4458214 (1984-07-01), Lakomy

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