Detector for clock phase and carrier phase

Details Detector for clock phase and carrier phase Detector for clock phase and carrier phase

2005-09-28

2009-08-18

Payne, David C (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S375000

Reexamination Certificate

active

07577217

ABSTRACT:
A detector for a receiver generates a clock phase detection signal and a carrier phase detection signal from of a plurality of clock polyphase signals of an oversampled signal. The detector comprises a plurality of carrier phase detectors, a plurality of variance estimation units, a selection unit and an output unit. Each phase detector determines the carrier phase of a clock polyphase signal and emits a carrier phase signal corresponding to the carrier phase. Each variance estimation unit determines the variance of one of the carrier phase signals. The selection unit compares the variances of the carrier phase signals with one another and emits a selection signal as the clock phase detection signal for selection of that clock polyphase signal whose associated carrier phase has the smallest variance. The output unit emits at least one of the carrier phase signal as the carrier phase detection signal.

REFERENCES:
patent: 3906337 (1975-09-01), Depenbrock
patent: 4764940 (1988-08-01), Paneth et al.
patent: 5203023 (1993-04-01), Saito et al.
patent: 5608764 (1997-03-01), Sugita et al.
patent: 5729701 (1998-03-01), Eriksson
Carlson, Bruce; “Communication Systems:An Introduction to Signals and Noise in Electrical Communication”; Forth Edition, 2002; p. 332, ISBN 0-07-121028-8.

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