Pulse or digital communications – Synchronizers – Frequency or phase control using synchronizing signal
Reexamination Certificate
2007-02-27
2007-02-27
Ghebretinsae, Temesghen (Department: 2611)
Pulse or digital communications
Synchronizers
Frequency or phase control using synchronizing signal
C375S364000, C370S514000
Reexamination Certificate
active
10969951
ABSTRACT:
A data sync signal detecting device for detecting a sync signal having sync signal detection errors. The detecting device applies the output data of a most-likelihood decoder to shift register bit cells. The data is sequentially shifted and held in the bit cells of the shift register. The bit cell outputs are separated into odd-numbered and even-numbered bit string and applied to first and second pattern matching circuits. The odd-numbered bit string is matched with “01001” by a first pattern matching circuit. The even-numbered bit string is matched with “01011” by a second pattern matching circuit. First and second matching results are applied to a coincidence number adder/majority decision circuit. When coincidence occurs, the matching result is “1”, and when non-coincidence occurs, the matching result is “0”. The coincidence number adder/majority decision circuit produces a sync signal detection output when the first or second matching result is “1”.
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Ghebretinsae Temesghen
Hitachi, ltd.
Mattingly, Stanger, Mlaur & Brundidge, P.C.
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