Method of arrangement to determine a clock timing error in a multi-carrier transmission system, and a related synchronization units
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United States of America Patent
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Sep 30, 2003
Grant Date -
N/A
app pub date -
Sep 22, 1998
filing date -
Sep 22, 1997
priority date (Note) -
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Abstract
In a multi-carrier transmission system, a clock timing error (.tau..sub.e) is calculated at the receiver's side and used for synchronization between a transmitting modem and a receiving modem (RX1). The clock timing error (.tau..sub.e) is calculated from phase errors (.phi..sub.0, .phi..sub.1, . . . , .phi..sub.i, . . . , .phi..sub.N-1) detected for a plurality of pilot carriers during a tracking mode in such a way that the share (A.sub.i) of a phase error (.phi..sub.i) detected for a particular pilot carrier in the clock timing error (.tau..sub.e) depends on the transmission quality (SNR.sub.i) of that pilot carrier over the transmission medium in between the two modems. In this way, the robustness of the synchronization for narrowband noise near a pilot carrier is improved significantly.
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