公开(公告)号：EP0923821B1

公开(公告)日：2003-09-03

申请号：EP97933959.5

申请日：1997-07-15

Applicant: STMicroelectronics N.V.

Inventor： ISAKSSON, Mikael ,  JOHANSSON, Magnus ,  TONVALL, Harry ,  OLSSON, Lennart ,  STEFANSSON, Tomas ,  ÖHMAN, Hans ,  BAHLENBERG, Gunnar ,  ISAKSSON, Anders ,  ÖKVIST, Göran ,  LJUNGGREN, Lis-Marie ,  NORDSTRÖM, Tomas ,  ISAKSSON, Lars-Ake ,  BENGTSSON, Daniel ,  HAKANSSON, Siwert ,  WEN, Ye

IPC: H04L5/06 ,  H04L27/26

CPC classification number: H04L1/0025 ,  H04L1/0059 ,  H04L1/0071 ,  H04L5/0007 ,  H04L5/0046 ,  H04L5/006 ,  H04L25/03159 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/3461 ,  H04L2025/03414 ,  H04L2025/03522

公开(公告)号：EP0922341B1

公开(公告)日：2002-11-13

申请号：EP97937939.3

申请日：1997-09-01

Applicant: STMicroelectronics N.V.

Inventor： ISAKSSON, Mikael ,  JOHANSSON, Magnus ,  TONVALL, Harry ,  OLSSON, Lennart ,  STEFANSSON, Tomas ,  ÖHMAN, Hans ,  BAHLENBERG, Gunnar ,  ISAKSSON, Anders ,  ÖKVIST, Göran ,  LJUNGGREN, Lis-Marie ,  NORDSTRÖM, Tomas ,  ISAKSSON, Lars-Ake ,  BENGTSSON, Daniel ,  HAKANSSON, Siwert ,  WEN, Ye

IPC: H04L5/06 ,  H04L27/26

CPC classification number: H04L5/006 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0046

Abstract: The invention relates to a multi-carrier transmission system, particularly a DMT system, in which data is transmitted between two transceivers using a plurality of carriers, the frequency bandwidth of the system being divided between said plurality of carriers, the transmission system being adapted for operation in a heterogeneous network including a number of subscriber equipments having different channel characteristics and coexisting on the same cable, the length of cable for each subscriber terminal varying in dependence on their respective locations. In accordance with the invention the transmission system includes allocation means for allocating the traffic of subscriber equipments having a shorter length of cable to tones starting from a higher frequency band of said system bandwidth.

Abstract translation: 本发明涉及一种多载波传输系统，特别是一种DMT系统，其中使用多个载波在两个收发信机之间传输数据，该系统的频带宽度在所述多个载波之间分配，传输系统适用于 在包括具有不同信道特性并且共存于相同电缆上的多个用户设备的异构网络中进行操作，每个用户终端的电缆长度根据它们各自的位置而变化。 根据本发明，传输系统包括分配装置，用于将具有较短电缆长度的用户设备的业务分配到从所述系统带宽的较高频带开始的音调。

公开(公告)号：EP1131900A1

公开(公告)日：2001-09-12

申请号：EP99963715.0

申请日：1999-11-18

Applicant: STMicroelectronics N.V.

Inventor： SJÖBERG, Frank ,  WILSON, Sarah, Kate ,  NILSSON, Rickard ,  BENGTSSON, Daniel ,  ISAKSSON, Mikael ,  NORDSTRÖM, Tomas ,  ÖDLING, Per ,  BAHLENBERG, Gunnar ,  JOHANSSON, Magnus ,  OLSSON, Lennart ,  ÖKVIST, Sven-Göran

IPC: H04B3/32 ,  H04B3/04

CPC classification number: H04B3/32 ,  H04L5/0007

Abstract: One problem, frequently encountered with VDSL transmission systems, is that upstream FEXT produced by system users having short wires can be very strong. Users having shorter wires get high bit rates whereas users having longer wires get low bit rates. In extreme cases it may happen that users with wire lengths greater than 1000 metre cannot transmit data upstream. The present invention provides a VDSL transmission system with a plurality of modems. The modems are located at varying distances from a central station. There is a target bit rate for each modem. These modems on shorter wires have control means for reducing their transmit power. This reduces the FEXT produced by these modems enabling modems on longer wires to transmit at higher bit rates.

公开(公告)号：EP1062760B1

公开(公告)日：2004-11-24

申请号：EP99907994.0

申请日：1999-02-17

Applicant: STMicroelectronics N.V.

Inventor： ISAKSSON, Mikael ,  BENGTSSON, Daniel ,  SJÖBERG, Frank ,  ÖDLING, Per c/o Bo Ödling ,  NILSSON, Rickard ,  BAHLENBERG, Gunnar ,  JOHANSSON, Magnus ,  OLSSON, Lennart ,  ÖKVIST, Göran

IPC: H04L5/06 ,  H04L27/26

CPC classification number: H04L5/143 ,  H04L27/2607 ,  H04L27/2626 ,  H04L27/2647

Abstract: Zipper is a time-synchronized frequency-division duplex implementation of discrete multi tone (DMT) modulation. Two communicating Zipper modems transmit DMT symbols simultaneously with a common clock. The Zipper scheme implies that every carrier, in the total set of carriers in the DMT signal, is exclusively chosen to be used for either the up-stream or the down-stream direction. 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 s 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 two VDSL systems employ a common cable. The telecommunications transmission system is adapted to: handle zipper transmissions transmitted over the common cable; at least partly mitigate NEXT; and permit transmissions in a first VDSL system which are asynchronous with transmissions in a second VDSL system.

公开(公告)号：EP1080533B1

公开(公告)日：2003-07-30

申请号：EP99929979.5

申请日：1999-05-11

Applicant: STMicroelectronics N.V.

Inventor： BÖRJESSON, Per, Ola ,  ISAKSSON, Mikael ,  ÖDLING, Per ,  BENGTSSON, Daniel ,  BAHLENBERG, Gunnar ,  JOHANSSON, Magnus ,  OLSSON, Lennart ,  ÖKVIST, Sven, Göran

IPC: H03M1/12

CPC classification number: H03M1/12

公开(公告)号：EP0923824B1

公开(公告)日：2003-05-28

申请号：EP97937938.5

申请日：1997-09-01

Applicant: STMicroelectronics N.V.

Inventor： ISAKSSON, Mikael ,  JOHANSSON, Magnus ,  TONVALL, Harry ,  OLSSON, Lennart ,  STEFANSSON, Tomas ,  ÖHMAN, Hans ,  BAHLENBERG, Gunnar ,  ISAKSSON, Anders ,  ÖKVIST, Göran ,  LJUNGGREN, Lis-Marie ,  NORDSTRÖM, Tomas ,  ISAKSSON, Lars-Ake ,  BENGTSSON, Daniel ,  HAKANSSON, Siwert ,  WEN, Ye

IPC: H04L5/06 ,  H04L27/26

CPC classification number: H04L5/006 ,  H04L1/0065 ,  H04L1/0071 ,  H04L5/0007 ,  H04L5/0046 ,  H04L27/3461

公开(公告)号：EP0920755B1

公开(公告)日：2003-03-26

申请号：EP97937934.4

申请日：1997-09-01

Applicant: STMicroelectronics N.V.

Inventor： ISAKSSON, Mikael ,  JOHANSSON, Magnus ,  TONVALL, Harry ,  OLSSON, Lennart ,  STEFANSSON, Thomas ,  ÖHMAN, Hans ,  BAHLENBERG, Gunnar ,  ISAKSSON, Anders ,  ÖKVIST, Göran ,  LJUNGGREN, Lis-Marie ,  NORDSTRÖM, Tomas ,  ISAKSSON, Lars-Ake ,  BENGTSSON, Daniel ,  HAKANSSON, Siwert ,  WEN, Ye

IPC: H04L5/06 ,  H04L27/26

CPC classification number: H04L27/2614 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2675

公开(公告)号：EP0922344B1

公开(公告)日：2003-02-26

申请号：EP97939278.4

申请日：1997-09-01

Applicant: STMicroelectronics N.V.

Inventor： ISAKSSON, Mikael ,  JOHANSSON, Magnus ,  TONVALL, Harry ,  OLSSON, Lennart ,  STEFANSSON, Tomas ,  ÖHMAN, Hans ,  BAHLENBERG, Gunnar ,  ISAKSSON, Anders ,  ÖKVIST, Göran ,  LJUNGGREN, Lis-Marie ,  NORDSTRÖM, Tomas ,  ISAKSSON, Lars-Ake ,  BENGTSSON, Daniel ,  HAKANSSON, Siwert ,  WEN, Ye

IPC: H04L5/06 ,  H04L27/26

CPC classification number: H04L25/03159 ,  H04L1/0065 ,  H04L1/0071 ,  H04L5/0007 ,  H04L5/0046 ,  H04L5/0048 ,  H04L5/006 ,  H04L5/0094 ,  H04L25/0228 ,  H04L2025/0349 ,  H04L2025/037 ,  H04L2025/03802

公开(公告)号：EP0920758B1

公开(公告)日：2002-12-18

申请号：EP98908382.9

申请日：1998-02-27

Applicant: STMicroelectronics N.V.

Inventor： OLSSON, Lennart ,  BAHLENBERG, Gunnar ,  BENGTSSON, Daniel ,  HAKANSSON, Siwert ,  ISAKSSON, Anders ,  ISAKSSON, Lars-Ake ,  ISAKSSON, Mikael ,  JOHANSSON, Magnus ,  LAHTI, Mauritz ,  LJUNGGREN, Lis-Marie ,  LUNDBERG, Hans ,  NORDSTRÖM, Tomas ,  OLOFSSON, Sven-Rune ,  STEFANSSON, Tomas ,  ÖMAN, Hans ,  ÖKVIST, Göran

IPC: H04L5/06 ,  H04L27/26

CPC classification number: H04L27/2662 ,  H04L27/2657 ,  H04L27/2672 ,  H04L27/2678

Abstract: The present invention relates to a receiver for use in an OFDM type transmission system, in which data is transmitted in frames. Each frame has a cyclic prefix which is a repetition of part of the frame. Control means are provided and the control means controls a sampling oscilator. The control means include estimation means for estimating timing deviations of the sampling clock. The estimation means operates entirely on frequency domain input data.

公开(公告)号：EP1060612B1

公开(公告)日：2002-11-20

申请号：EP99905407.5

申请日：1999-01-28

Applicant: STMicroelectronics N.V.

Inventor： OLOFSSON, Sven-Rune ,  OLSSON, Lennart ,  JOHANSSON, Joachim ,  ÖHMAN, Hans ,  ISAKSSON, Mikael ,  JOHANSSON, Magnus ,  STEFANSSON, Tomas ,  BAHLENBERG, Gunnar ,  ISAKSSON, Anders ,  ÖKVIST, Göran ,  LJUNGGREN, Lis-Marie ,  BENGTSSON, Daniel

IPC: H04M11/00

CPC classification number: H04M11/062

Abstract: When delivering a broadband service, such as xDSL, without inband POTS, it is necessary to separate the analogue POTS signal and the xDSL signal from each other at both the CO (Central Office) and the CP (Customer's Premises). This can be achieved by using an active POTS splitter. The present invention incorporates test functionality for the line between the CP and the CO, or ONU (Optical Network Unit), in the POTS splitter. This enables two-sided measurements on the line, both during installation and during operation. The measurements are performed at the CO and upon request, or when the test device automatically sends a test message/signal. In this way there is no need for field technicians at the CP side. The POTS splitter can have a unique identity code that is transmitted to the CO each time a test is started, or on receipt of a request from the CO.