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    Gain adaptation for downstream vectoring systems
    1.
    发明授权
    Gain adaptation for downstream vectoring systems 有权

    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.

    Crosstalk mitigation for out-of-band tones
    5.
    发明授权
    Crosstalk mitigation for out-of-band tones 有权

    公开(公告)号：US10727899B2

    公开(公告)日：2020-07-28

    申请号：US16307265

    申请日：2017-05-30

    Applicant: Alcatel Lucent

    Inventor： Dirk Vanderhaegen

    IPC: H04B3/32 ,  H04M3/34 ,  H04M11/06 ,  H04M3/26 ,  H04M3/30

    Abstract: The method includes inputting first groups of frequency samples to be transmitted over, respectively received from, first and second subsets of subscriber lines at respective first tones and following a first group selection order, alternated with mirrored second groups of frequency samples to be transmitted over, respectively received from, the second subset of subscriber lines at respective mirrored second tones of the first tones, and following a mirrored second group selection order of the first group selection order, to a vectoring processor for joint mitigation of first crosstalk present over the first and second subsets of subscriber lines at the respective first tones and second crosstalk present over the second subset of subscriber lines at the respective second tones. The first tones are common to the first and second transmit spectra. Mirroring is with respect to a folding frequency derived from a reference sampling frequency applicable to the first subset of subscriber lines.

    Detection of demapping errors
    6.
    发明授权
    Detection of demapping errors 有权

    公开(公告)号：US09722664B2

    公开(公告)日：2017-08-01

    申请号：US14904579

    申请日：2014-07-31

    Applicant: Alcatel-Lucent

    Inventor： Carl Nuzman ,  Dirk Vanderhaegen

    IPC: H04B3/487 ,  H04L5/00 ,  H04L25/02 ,  H04M3/30 ,  H04M3/34

    CPC classification number: H04B3/487 ,  H04L5/0048 ,  H04L25/022 ,  H04L25/0222 ,  H04L25/023 ,  H04L25/0242 ,  H04M3/306 ,  H04M3/34

    Abstract: At least one crosstalk probing sequence out of a set of orthogonal crosstalk probing sequences is assigned to the at least one respective disturber line for modulation at the given carrier frequency of at least one respective sequence of crosstalk probing symbols, and error samples are successively measured by a receiver coupled to the victim line at the given carrier frequency while the at least one sequence of crosstalk probing symbols are being transmitted over the at least one respective disturber line are fed back for crosstalk estimation. The received error samples are next correlated with at least one unassigned crosstalk probing sequence out of the set of orthogonal crosstalk probing sequences for detection of a demapping error in the received error samples.

    HIERARCHICAL AND ADAPTIVE MULTI-CARRIER DIGITAL MODULATION AND DEMODULATION
    8.
    发明申请
    HIERARCHICAL AND ADAPTIVE MULTI-CARRIER DIGITAL MODULATION AND DEMODULATION 有权
    分层和自适应多载波数字调制和解调

    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。

    Randomization of crosstalk probing signals
    9.
    发明授权
    Randomization of crosstalk probing signals 有权

    公开(公告)号：US09917617B2

    公开(公告)日：2018-03-13

    申请号：US14910073

    申请日：2014-08-26

    Applicant: Alcatel-Lucent

    Inventor： Dirk Vanderhaegen ,  Carl Nuzman ,  Danny Van Bruyssel

    IPC: H04B3/32 ,  H04M3/34 ,  H04B3/487 ,  H04M3/00 ,  H04M3/30

    CPC classification number: H04B3/32 ,  H04B3/487 ,  H04M3/007 ,  H04M3/304 ,  H04M3/34

    Abstract: In accordance with an embodiment, the vectoring controller is configured to iterate through successive crosstalk acquisition cycles and, within respective ones of the crosstalk acquisition cycles, to configure sequences of crosstalk probing symbols for transmission over the respective communication lines, to receive sequences of error samples as successively measured by respective receivers coupled to the respective communication lines while the sequences of crosstalk probing symbols are being transmitted, and to determine crosstalk estimates between the respective communication lines based on the sequences of error samples. The vectoring controller is further configured to randomize the successive sequences of crosstalk probing symbols used during the successive crosstalk acquisition cycles, and to iteratively configure the vectoring processor based on the successive crosstalk estimates.

    Hierarchical and adaptive multi-carrier digital modulation and demodulation
    10.
    发明授权
    Hierarchical and adaptive multi-carrier digital modulation and demodulation 有权
    分层和自适应多载波数字调制解调

    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。

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