Data decision-directed timing and carrier recovery circuits

Details Data decision-directed timing and carrier recovery circuits Data decision-directed timing and carrier recovery circuits

1986-11-28

1988-02-16

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 97, 375110, H04L 702

Patent

active

047260432

ABSTRACT:
The performance of carrier and/or timing recovery circuits which control the recovery of data signals from modulated quadrature-related carrier signals is improved by the use of a phase detector which correlates the two most significant bits of the data signals. This correlation significantly reduces the acquisition time, i.e., the time required for these circuits to acquire synchronous operation. Moreover, this correlation can be advantageously combined with correlations of the most and least significant bits of the data signals to reduce phase jitter as well as reduce the acquisition time.

REFERENCES:
patent: 3436480 (1969-04-01), Pan
patent: 3440548 (1969-04-01), Saltzberg
patent: 4021757 (1977-05-01), Nossen
patent: 4206425 (1980-06-01), Nossen
patent: 4253189 (1981-02-01), Lemoussu et al.
patent: 4404675 (1983-09-01), Karchevski
patent: 4426712 (1984-01-01), Popiel
patent: 4494239 (1985-01-01), Martin
patent: 4646329 (1987-02-01), Bojarski

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