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公开(公告)号：DE69922176T2
公开(公告)日：2005-11-10
申请号：DE69922176
申请日：1999-02-17
Applicant: ST MICROELECTRONICS NV
Inventor： ISAKSSON MIKAEL , BENGTSSON DANIEL , SJOEBERG FRANK , OEDLING PER , NILSSON RICKARD , BAHLENBERG GUNNAR , JOHANSSON MAGNUS , OLSSON LENNART , OEKVIST GOERAN
Abstract: Zipper is the time-synchronized frequency-division duplex implementation of discrete multi-tome (DMT) modulation. Two communicating Zipper modems transmit DMT symbols simultaneously with a common clock. When all transmitters are time synchronized, the near end cross-talk (NEXT) and near end echoes injected into the received signal are orthogonal to the desired signal. The present invention provides a telecommunications transmission system using zipper and having at least two VDSL systems. Each VDSL system comprises a pair of zipper modems communicating over a cable transmission path. The telecommunications transmission system handles zipper transmission transmitted over the common cable; at least partly mitigates NEXT; and permits transmissions in a first VDSL system which are asynchronous with transmissions in a second VDSL system.
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公开(公告)号：DE69912148T2
公开(公告)日：2004-07-08
申请号：DE69912148
申请日：1999-11-18
Applicant: ST MICROELECTRONICS NV
Inventor： SJOEBERG FRANK , WILSON KATE , NILSSON RICKARD , BENGTSSON DANIEL , ISAKSSON MIKAEL , NORDSTROEM TOMAS , OEDLING PER , BAHLENBERG GUNNAR , JOHANSSON MAGNUS , OLSSON LENNART , OEKVIST SVEN-GOERAN
IPC: H04J11/00 , H04B3/04 , H04B3/32 , H04L29/10 , H04M20060101
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公开(公告)号：DE69912148D1
公开(公告)日：2003-11-20
申请号：DE69912148
申请日：1999-11-18
Applicant: ST MICROELECTRONICS NV
Inventor： SJOEBERG FRANK , WILSON KATE , NILSSON RICKARD , BENGTSSON DANIEL , ISAKSSON MIKAEL , NORDSTROEM TOMAS , OEDLING PER , BAHLENBERG GUNNAR , JOHANSSON MAGNUS , OLSSON LENNART , OEKVIST SVEN-GOERAN
IPC: H04J11/00 , H04B3/04 , H04B3/32 , H04L29/10 , H04M20060101
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公开(公告)号：DE69922176D1
公开(公告)日：2004-12-30
申请号：DE69922176
申请日：1999-02-17
Applicant: ST MICROELECTRONICS NV
Inventor： ISAKSSON MIKAEL , BENGTSSON DANIEL , SJOEBERG FRANK , OEDLING PER , NILSSON RICKARD , BAHLENBERG GUNNAR , JOHANSSON MAGNUS , OLSSON LENNART , OEKVIST GOERAN
Abstract: Zipper is the time-synchronized frequency-division duplex implementation of discrete multi-tome (DMT) modulation. Two communicating Zipper modems transmit DMT symbols simultaneously with a common clock. When all transmitters are time synchronized, the near end cross-talk (NEXT) and near end echoes injected into the received signal are orthogonal to the desired signal. The present invention provides a telecommunications transmission system using zipper and having at least two VDSL systems. Each VDSL system comprises a pair of zipper modems communicating over a cable transmission path. The telecommunications transmission system handles zipper transmission transmitted over the common cable; at least partly mitigates NEXT; and permits transmissions in a first VDSL system which are asynchronous with transmissions in a second VDSL system.
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