Pulse or digital communications – Synchronizers – Phase displacement – slip or jitter correction
Reexamination Certificate
2005-09-20
2005-09-20
Bocure, Tesfaldet (Department: 2631)
Pulse or digital communications
Synchronizers
Phase displacement, slip or jitter correction
Reexamination Certificate
active
06947512
ABSTRACT:
A carrier reproducing circuit capable of judging the polarity of alienation frequency. A TMCC section is detected from the synchronous detection output from a synchronous detection circuit (1) by a TMCC section detecting circuit (4), the synchronous detection output is converted to a signal point arrangement by a signal point arrangement converting circuit (5), the phase of the converted signal point position signal is rotated at a predetermined angular velocity for each symbol of the TMCC by a phase rotating circuit (8), the signal position signal whose phase is rotated is phase-detected by a phase detector (6), an auto-correlation function of the phase detection output in the TMCC section is determined by an auto-correlation function determining circuit (7) and angular velocity information based on the period of the waveform of the determined auto-correlation function is obtained, the phase-rotation angular velocity at the phase rotation circuit (8) is subtracted from the obtained angular velocity by a subtracting circuit (9), and sine and cosine wave data on frequency based on the output of the subtraction are generated and sent to the phase detection circuit (1) by a numerical control oscillator (2).
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International Search Report.
Office Letter, Notification of Refusal Reason, JP H10-259128, Japanese Patent Office.
Shinoda Atsushi
Shiraishi Kenichi
Bocure Tesfaldet
Kabushiki Kaisha Kenwood
Kumar Pankaj
Robinson Eric J.
Robinson Intellectual Property Law Office P.C.
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