Pulse or digital communications – Synchronizers
Reexamination Certificate
2005-05-24
2005-05-24
Tran, Khai (Department: 2637)
Pulse or digital communications
Synchronizers
Reexamination Certificate
active
06898256
ABSTRACT:
In a synchronization method and apparatus in a data transmission using a transparent transmission line, a periodic amplitude modulation is applied, or a zero-point is inserted, as a synchronizing signal to a transmission signal point on a transmission side at a preceding stage of a transparent transmission line. Also, in case of a frame synchronization, a power value of a received signal is calculated on a reception side of the above-mentioned transparent transmission line and the synchronizing signal is vectorized using the power values whose phases are different from each other by 90 degrees on a time axis.
REFERENCES:
patent: 5600634 (1997-02-01), Satoh et al.
patent: 5771224 (1998-06-01), Seki et al.
patent: 6567988 (2003-05-01), Okawa
Kaku Takashi
Kurakata Takahiro
Miyazawa Hideo
Fujitsu Limited
Katten Muchin Zavis & Rosenman
Tran Khai
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