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公开(公告)号：JP2001168834A
公开(公告)日：2001-06-22
申请号：JP2000311561
申请日：2000-10-12
Applicant: ST MICROELECTRONICS NV , ST MICROELECTRONICS SA
Inventor： ISAKSSON MIKAEL , OLSSON LENNART , MESTDAGH DENIS JULIEN GILLES
Abstract: PROBLEM TO BE SOLVED: To provide a method for matching timing of DMT frames with the same frame timing in a DMT system adopted by a communication system where the DMT system is adopted as a multi-carrier system, two VDLS systems each having a couple of modems are employed, and at least the two VDSL systems belong to a single-binder group, in common with both the VDSL systems. SOLUTION: This method includes a step, where a temporal deviation of a crosstalk DMT signal added to a received DMT signal and an output thereof are estimated through the estimation employed by a modem to synchronize its own frame timing with timing of a main crosstalk signal frame, a step where autocorrelation is used for a received signal an a copy resulting from the delayed received signal, and a step where a frame border of different DMT components of the received signal by detecting a part of the signal with maximum correlation.
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公开(公告)号：DE69909292T2
公开(公告)日：2004-04-22
申请号：DE69909292
申请日：1999-10-13
Applicant: ST MICROELECTRONICS NV , ST MICROELECTRONICS SA
Inventor： ISAKSSON MIKAEL , MESTDAGH DENIS JULIEN GILLES , OLSSON LENNART
Abstract: In a DMT telecommunciations transmission system having at least two VDSL systems, each comprising a pair of modems, and belonging to a single binder group common to both VDSL systems, a method is described for keeping DMT frames aligned to the same frame timing. In this way, orthogonality holds and adjacent carriers can be used for different transmission directions without an capacity loss due to NEXT cross-talk. The steps are: estimating the time mis-alignment and power of cross-talk DMT signals added to a received DMT signal. The estimate is used by the modem to synchronise its own frame timing to a main cross-talker's frame timing auto-correlation is used on the received signal and a delayed copy of the received signal correlation maxima determine the frame boundaries of different DMT components of the received signal.
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公开(公告)号：DE69909292D1
公开(公告)日：2003-08-07
申请号：DE69909292
申请日：1999-10-13
Applicant: ST MICROELECTRONICS NV , ST MICROELECTRONICS SA
Inventor： ISAKSSON MIKAEL , MESTDAGH DENIS JULIEN GILLES , OLSSON LENNART
Abstract: In a DMT telecommunciations transmission system having at least two VDSL systems, each comprising a pair of modems, and belonging to a single binder group common to both VDSL systems, a method is described for keeping DMT frames aligned to the same frame timing. In this way, orthogonality holds and adjacent carriers can be used for different transmission directions without an capacity loss due to NEXT cross-talk. The steps are: estimating the time mis-alignment and power of cross-talk DMT signals added to a received DMT signal. The estimate is used by the modem to synchronise its own frame timing to a main cross-talker's frame timing auto-correlation is used on the received signal and a delayed copy of the received signal correlation maxima determine the frame boundaries of different DMT components of the received signal.
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公开(公告)号：DE69902621D1
公开(公告)日：2002-10-02
申请号：DE69902621
申请日：1999-02-09
Applicant: ST MICROELECTRONICS NV , ST MICROELECTRONICS SA
Inventor： ISAKSSON MIKAEL , JOHANSSON MAGNUS , MESTDAGH DENIS JULIEN GILLES , MAZZONI SIMONE
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