Method for recovering a control signal for controlling the phase

Details Method for recovering a control signal for controlling the phase Method for recovering a control signal for controlling the phase

1988-12-21

1989-08-22

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375120, 375 97, 329124, H03D 302

Patent

active

048603201

ABSTRACT:
Reliable phase synchronicity between a local carrier signal and the carrier signal of an amplitude and/or phase shift keyed received signal is produced as quickly as possible by employing a phase detector characteristic whose root means square outside of the synchronization point is as large as possible and whose synchronization point, i.e., zero passage, is situated such that it also considers a phase deviation of the received signal component from its quadrature position.

REFERENCES:
patent: 3970946 (1976-07-01), Matsuo
patent: 4084137 (1978-04-01), Welti
patent: 4404532 (1983-09-01), Welti
patent: 4546322 (1985-10-01), Crutcher
patent: 4646326 (1987-02-01), Backof, Jr. et al.
patent: 4687999 (1987-08-01), Desperben et al.
M. Hoffman, "Carrier Recovery for M-QAM-Signals," published in proceedings of the European Conference of Radio Relay Systems (Nov., 1986), pp. 247-253.
Y. Matsuo et al., "Carrier Recovery Systems for Arbitrarily Mapped APK Signals," published in IEEE Transactions on Communications, vol. Com-30, No. 10, (Oct., 1982), pp. 2385-2390.

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