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Method and apparatus for timing recovery in ADSL transceivers under a TCM-ISDN crosstalk environment
Method and apparatus for timing recovery in ADSL transceivers under a TCM-ISDN crosstalk environment
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机译:在TCM-ISDN串扰环境下ADSL收发信机中定时恢复的方法和装置
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摘要
A system used to synchronize the clock frequency of a receiver with that of a transmitter, where both the receiver and transmitter communicate using the ADSL Annex C standard. The transmitter continuously transmits pilot tones to the receiver. The receiver determines the phase error between sequential pilot tone symbols to determine a phase error. The receiver uses the phase error to adjust the receiver clock frequency. However, if the most recently received symbol is subject to near end crosstalk or is subject to far end crosstalk and is a boundary symbol, the receiver ignores the phase error and does not adjust the receiver clock frequency.
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