Synchronization method and apparatus
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United States of America Patent
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May 24, 2005
Grant Date -
Jul 3, 2003
app pub date -
Dec 12, 2002
filing date -
Dec 4, 2000
priority date (Note) -
Expired
status (Latency Note)
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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.
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