Pulse or digital communications – Transceivers – Modems
Reexamination Certificate
2006-01-31
2006-01-31
Tse, Young T. (Department: 2637)
Pulse or digital communications
Transceivers
Modems
C375S260000, C379S399010
Reexamination Certificate
active
06993068
ABSTRACT:
In a telecommunications transmission system using a DTM system as a multicarrier system and having at least two VDSL systems, each including a pair of modems, the at least two VDSL systems belonging to a single binder group common to both VDSL systems, a method in the DMT system for keeping DMT frames aligned to the same frame timing includes estimating the time mis-alignment and power of cross-talk DMT signals added to a received DMT signal when the estimate is used by the modem to synchronize its own frame timing to a main cross-talkers frame timing, using auto-correlation on the received signal and a delayed copy of the received signal, and detecting correlation maxima that determine the frame boundaries of different DMT components of the received signal.
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patent: 5812523 (1998-09-01), Isaksson et al.
patent: 6134283 (2000-10-01), Sands et al.
patent: 6178025 (2001-01-01), Hardcastle et al.
patent: 0 917 315 (1999-05-01), None
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European Search Report from European patent application No. 99850150, filed Oct. 13, 1999.
Isaksson Mikael
Mestdagh Denis Julien Gilles
Olsson Lennart
Chang Edith
Jorgenson Lisa K.
McClellan William R.
STMicroelectronics NV
STMicroelectronics S.A.
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