公开(公告)号：US09887736B2

公开(公告)日：2018-02-06

申请号：US15119584

申请日：2015-03-09

Applicant: Alcatel Lucent

Inventor： Jochen Maes ,  Michael Timmers

IPC: H04B7/02 ,  H04B3/32 ,  H04B7/04 ,  H04L1/00 ,  H04L5/00 ,  H04L5/14 ,  H04L25/02 ,  H04L25/03 ,  H03M13/35 ,  H04B7/0413 ,  H04L25/497

CPC classification number: H04B3/32 ,  H03M13/353 ,  H04B7/0413 ,  H04B7/0465 ,  H04L1/0011 ,  H04L1/0033 ,  H04L5/0048 ,  H04L5/143 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/03343 ,  H04L25/4975

Abstract: A network unit includes a non-linear precoder for jointly pre-processing transmit samples to be transmitted over respective communication channels for crosstalk mitigation. The non-linear precoder includes a first non-linear precoding stage configured to operate according to a first triangular precoding matrix and including a modulo function, followed by a second linear precoding stage configured to operate according to a second precoding matrix. The network unit further includes a first pilot signal generator configured to generate first pilot signals for pre-processing by the second precoding stage only to yield partially-precoded pilot signals for further transmission over the respective communication channels, and a controller configured to update the second precoding matrix based on first error measurements performed during the transmission of the partially-precoded pilot signals over the respective communication channels while keeping the first precoding matrix unaltered.

公开(公告)号：US11258479B2

公开(公告)日：2022-02-22

申请号：US14654690

申请日：2014-01-07

Applicant: Alcatel Lucent

Inventor： Jochen Maes ,  Michael Timmers ,  Dirk Vanderhaegen ,  Carl Nuzman ,  Danny Van Bruyssel

IPC: H04B3/32

Abstract: In accordance with an embodiment, the method includes detecting an update event whereupon a precoder needs to be updated, sending signal adjustment information to a receiver remotely coupled to a subscriber line out of the plurality of subscriber lines indicative of a signal compensation factor to be applied to a receive communication signal to compensate for a channel bias caused by the scheduled precoder update, and time-coordinating the precoder update with the enforcement of the signal compensation factor at the receiver.

公开(公告)号：US09438394B2

公开(公告)日：2016-09-06

申请号：US14350388

申请日：2012-10-09

Applicant: Alcatel-Lucent

Inventor： Dirk Vanderhaegen ,  Danny Van Bruyssel ,  Jochen Maes ,  Koen De Schepper ,  Michael Timmers

IPC: H04L27/26 ,  H04L5/00 ,  H04L1/00 ,  H04L27/34

CPC classification number: H04L5/0046 ,  H04L1/0003 ,  H04L27/3488 ,  Y02D50/10

Abstract: In an embodiment the method includes, at a transmit side, grouping carriers into carrier groups, and selecting a group constellation diagram for modulation of the carriers of a given carrier group. The selected group constellation diagram is built as a hierarchical sum of I super-imposed constellations vectors having predefined decreasing powers with the P strongest and the Q weakest constellation vectors being omitted. The carriers of the carrier group are modulated by means of the selected group constellation diagram, and P and/or Q parameters per carrier group and per multi-carrier data symbol are adjusted.

Abstract translation: 在一个实施例中，该方法包括在发送侧将载波分组成载波组，以及选择用于调制给定载波组的载波的组星座图。 所选择的组星座图被构建为具有预定义的减少幂的I超强加星座矢量的分层总和，其中P最强且Q最弱星座矢量被省略。 通过选择的组星座图调制载波组的载波，并且调整每个载波组和每个多载波数据符号的P和/或Q参数。

公开(公告)号：US20140247900A1

公开(公告)日：2014-09-04

申请号：US14349716

申请日：2012-10-16

Applicant: Alcatel-Lucent

Inventor： Jochen Maes ,  Dirk Vanderhaegen ,  Michael Timmers ,  Danny Van Bruyssel

IPC: H04L27/26

CPC classification number: H04L27/2626 ,  H04L1/1607 ,  H04L1/1825 ,  H04L1/1864 ,  H04L1/1893 ,  H04L1/1896 ,  H04L27/183 ,  H04L27/3488

Abstract: In a multi-tone data transmission system, data are modulated on a set of M tones for being transmitted between a transmitter and a receiver. The data retransmission request device in such system is adapted to request retransmission of a data transmission unit that is hierarchically modulated at a particular hierarchical level and that is modulated on a particular group of N tones, N being a positive integer value greater than one and smaller than or equal to M.

Abstract translation: 在多音调数据传输系统中，数据被调制在一组M个音调上以便在发射机和接收机之间传输。 这种系统中的数据重发请求装置适用于请求重发数据传输单元，该数据传输单元在特定分层级别进行分层调制，并且调制在特定的一组N个音调上，N为大于1或更小的正整数 超过或等于M.

公开(公告)号：US09628157B2

公开(公告)日：2017-04-18

申请号：US14782730

申请日：2014-04-28

Applicant: Alcatel Lucent

Inventor： Jochen Maes ,  Michael Timmers

IPC: H04L27/28 ,  H04B7/0456 ,  H04B3/32 ,  H04L25/03

CPC classification number: H04B7/0456 ,  H04B3/32 ,  H04L25/03159 ,  H04L25/03343 ,  H04L2025/03636

Abstract: The present invention relates to a signal processing unit for pre-processing signals for crosstalk mitigation.In accordance with an embodiment of the invention, the signal processing unit comprises a modulo unit configured to determine individual modulo shifts (Δ) for respective transmit samples (U) to be transmitted over respective communication channels (H) based on first channel coupling information (L), and to add the modulo shifts to the respective transmit samples, and a linear precoder configured to jointly process the resulting transmit samples based on second channel coupling information (p′) that aim at effectively diagonalizing an overall channel matrix (HP′) resulting from the concatenation of the linear precoder with the communication channels.The present invention also relates to a method for pre-processing signals for crosstalk mitigation.

公开(公告)号：US09166850B2

公开(公告)日：2015-10-20

申请号：US14349716

申请日：2012-10-16

Applicant: Alcatel-Lucent

Inventor： Jochen Maes ,  Dirk Vanderhaegen ,  Michael Timmers ,  Danny Van Bruyssel

IPC: H04L27/28 ,  H04L27/26 ,  H04L1/16 ,  H04L1/18 ,  H04L27/18 ,  H04L27/34

CPC classification number: H04L27/2626 ,  H04L1/1607 ,  H04L1/1825 ,  H04L1/1864 ,  H04L1/1893 ,  H04L1/1896 ,  H04L27/183 ,  H04L27/3488

Abstract: In a multi-tone data transmission system, data are modulated on a set of M tones for being transmitted between a transmitter and a receiver. The data retransmission request device in such system is adapted to request retransmission of a data transmission unit that is hierarchically modulated at a particular hierarchical level and that is modulated on a particular group of N tones, N being a positive integer value greater than one and smaller than or equal to M.

Abstract translation: 在多音调数据传输系统中，数据被调制在一组M个音调上以便在发射机和接收机之间传输。 这种系统中的数据重发请求装置适用于请求重发数据传输单元，该数据传输单元在特定分层级别进行分层调制，并且调制在特定的一组N个音调上，N为大于1或更小的正整数 超过或等于M.

公开(公告)号：US20140241378A1

公开(公告)日：2014-08-28

申请号：US14350388

申请日：2012-10-09

Applicant: ALCATEL-LUCENT

Inventor： Dirk Vanderhaegen ,  Danny Van Bruyssel ,  Jochen Maes ,  Koen De Schepper ,  Michael Timmers

IPC: H04L5/00

CPC classification number: H04L5/0046 ,  H04L1/0003 ,  H04L27/3488 ,  Y02D50/10

Abstract: In an embodiment the method includes, at a transmit side, grouping carriers into carrier groups, and selecting a group constellation diagram for modulation of the carriers of a given carrier group. The selected group constellation diagram is built as a hierarchical sum of I super-imposed constellations vectors having predefined decreasing powers with the P strongest and the Q weakest constellation vectors being omitted. The carriers of the carrier group are modulated by means of the selected group constellation diagram, and P and/or Q parameters per carrier group and per multi-carrier data symbol are adjusted.

Abstract translation: 在一个实施例中，该方法包括在发送侧将载波分组成载波组，以及选择用于调制给定载波组的载波的组星座图。 所选择的组星座图被构建为具有预定义的减少幂的I超强加星座矢量的分层总和，其中P最强且Q最弱星座矢量被省略。 通过选择的组星座图调制载波组的载波，并且调整每个载波组和每个多载波数据符号的P和/或Q参数。