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.

公开(公告)号：EP1080533A1

公开(公告)日：2001-03-07

申请号：EP99929979.5

申请日：1999-05-11

Applicant: STMicroelectronics N.V.

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

IPC: H03M1/12

CPC classification number: H03M1/12

Abstract: A circuit, for digitising an analogue signal includes an analogue to digital converter and a clip processor, adapted to estimate a value for clipped digital signal samples and a buffer adapted to dynamically store a plurality of digitised samples produced by said analogue to digital converter. The clip processor is adapted to read digitised samples from said buffer and replace clipped digitised samples.

公开(公告)号：EP1131900B1

公开(公告)日：2003-10-15

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

公开(公告)号：EP0922346B1

公开(公告)日：2003-07-16

申请号：EP97939280.0

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: H04L25/03 ,  H04L27/26

CPC classification number: H04L25/03159 ,  H04L1/0065 ,  H04L1/0071 ,  H04L27/2649 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2662 ,  H04L2025/03414 ,  H04L2025/03522

公开(公告)号：EP1031199B1

公开(公告)日：2003-02-26

申请号：EP98956052.9

申请日：1998-11-11

Applicant: STMicroelectronics N.V.

Inventor： ISAKSSON, Mikael ,  JOHANSSON, Magnus ,  OLSSON, Lennart ,  STEFANSSON, Tomas ,  ÖHMAN, Hans ,  BAHLENBERG, Gunnar ,  ISAKSSON, Anders ,  ÖKVIST, Göran ,  LJUNGGREN, Lis-Marie ,  BENGTSSON, Daniel ,  OLOFSSON, Sven-Rune ,  JOHANSSON, Joachim ,  BÖRJESSON, Per, Ola ,  GRIP, Niklas ,  NILSSON, Richard ,  SJÖBERG, Frank ,  WILSON, Sarah ,  ÖDLING, Per

IPC: H04B15/00 ,  H04B3/32

CPC classification number: H04L25/10 ,  H04B1/123 ,  H04L27/2647

公开(公告)号：EP1084546B1

公开(公告)日：2003-01-22

申请号：EP99928289.0

申请日：1999-05-11

Applicant: STMicroelectronics N.V.

Inventor： JOHANSSON, Magnus ,  OLSSON, Lennart ,  BAHLENBERG, Gunnar ,  BENGTSSON, Daniel ,  ISAKSSON, Mikael ,  OLOFSSON, Sven-Rune ,  ÖKVIST, Sven, Göran

IPC: H04L5/06 ,  H04L27/26

CPC classification number: H04L25/03159 ,  H04L27/2655 ,  H04L2025/03414 ,  H04L2025/03522 ,  H04L2025/03617

公开(公告)号：EP0923823B1

公开(公告)日：2002-11-13

申请号：EP97937937.7

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: H04L27/2647

公开(公告)号：EP1084546A1

公开(公告)日：2001-03-21

申请号：EP99928289.0

申请日：1999-05-11

Applicant: STMicroelectronics N.V.

Inventor： JOHANSSON, Magnus ,  OLSSON, Lennart ,  BAHLENBERG, Gunnar ,  BENGTSSON, Daniel ,  ISAKSSON, Mikael ,  OLOFSSON, Sven-Rune ,  ÖKVIST, Sven, Göran

IPC: H04L5/06 ,  H04L27/26

CPC classification number: H04L25/03159 ,  H04L27/2655 ,  H04L2025/03414 ,  H04L2025/03522 ,  H04L2025/03617

Abstract: In a multi-carrier system employing OFDM, for example DMT, an adaptive channel equalizer is normally used, operating in the frequency domain. The internal parameters on which such equalizers operate information that defines a time delay between the transmitter and receiver sampling clock. The sampling clock is controlled so that the time delay between the transmitter and the receiver is effectively eliminated. If the information used to control the sampling clock is received from the equalized data stream, it will introduce an ambiguity between the operation of the channel equalizer and the mechanism used to control the sampling clock. Operation of the equalizer can mask an increasing time difference, between transmitter and receiver, which the sample clock controller should be tracking. The present invention eliminates the ambiguities in the operation of the equalizer and sample clock controller by preventing the equalizer accepting time differences which should be corrected by operation of the sample clock controller. The method of the present invention incorporates a modified algorithm for updating the equalizer's parameters. The present invention may be used in, for example, ADSL and VDSL systems employing DMT which have relatively stationary channels. The principle, however, has general application and may be used, with advantage, in mobile and semi-mobile systems such as DECT and GSM.