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    Devices and methods for machine learning assisted precoding
    1.
    发明授权
    Devices and methods for machine learning assisted precoding 有权

    公开(公告)号：US11996915B2

    公开(公告)日：2024-05-28

    申请号：US17620716

    申请日：2020-06-23

    Applicant: INSTITUT MINES-TELECOM

    Inventor： Ghaya Rekaya ,  Aymen Askri

    IPC: H04B7/0456 ,  G06N20/00

    CPC classification number: H04B7/0456 ,  G06N20/00

    Abstract: A precoder for precoding a vector of information symbols is provided. The precoder includes a radius determination unit configured to determine a search sphere radius, the determination of the search sphere radius comprising applying a machine learning algorithm to input data dependent on the vector of information symbols and on a predefined precoding matrix; a sphere encoding unit configured to determine a perturbation vector from lattice points found inside a spherical region by applying a sphere search-based sequential algorithm, the spherical region having as a radius the search sphere radius, and a precoding unit configured to precode the vector of information symbols using the perturbation vector and a precoding matrix.

    Optical transmission system and method for core selection in multi-core fibers
    4.
    发明授权
    Optical transmission system and method for core selection in multi-core fibers 有权

    公开(公告)号：US11218218B2

    公开(公告)日：2022-01-04

    申请号：US17050358

    申请日：2019-04-10

    Applicant: INSTITUT MINES-TELECOM

    Inventor： Ghaya Rekaya ,  Akram Abouseif ,  Yves Jaouen

    IPC: H04J14/04 ,  H04B10/2525 ,  H04B10/2581 ,  H04B10/50

    Abstract: Embodiments provide an optical transmission system comprising an optical transmitter configured to transmit data over an optical fiber transmission channel comprising a multi-core fiber, the data being carried by one or more optical signals propagating along the multi-core fiber according to a plurality of cores, each core among the plurality of cores being associated with one or more core parameters, wherein the optical transmission system comprises a core selection device configured to select a set of transmit cores among the plurality of cores according to a transmit core selection criterion, the transmit core selection criterion being related to the one or more core parameters, the optical transmitter being configured to transmit the data over the set of transmit cores.

    Methods and devices for multi-core fiber data transmission using data precoding
    5.
    发明授权
    Methods and devices for multi-core fiber data transmission using data precoding 有权

    公开(公告)号：US11916597B2

    公开(公告)日：2024-02-27

    申请号：US17621422

    申请日：2020-06-23

    Applicant: INSTITUT MINES-TELECOM

    Inventor： Akram Abouseif ,  Ghaya Rekaya

    IPC: H04B10/2581

    CPC classification number: H04B10/2581 ,  H04B2210/254

    Abstract: An optical transmitter for transmitting a vector of information symbols over an optical fiber transmission channel made of a multi-core fiber, optical signals carrying the vector of information symbols propagating along the multi-core fiber according to two or more cores, wherein the optical transmitter includes a precoder configured to determine a precoding matrix depending on one or more fiber parameters associated with the multi-core fiber and to precode the vector of information symbols by multiplying the vector of information symbols by the precoding matrix.

    Devices and methods for machine learning assisted sphere decoding
    6.
    发明授权
    Devices and methods for machine learning assisted sphere decoding 有权

    公开(公告)号：US11888655B2

    公开(公告)日：2024-01-30

    申请号：US17620715

    申请日：2020-06-23

    Applicant: INSTITUT MINES-TELECOM

    Inventor： Ghaya Rekaya ,  Aymen Askri

    IPC: H04L25/03 ,  G06N20/10 ,  G06N3/048

    CPC classification number: H04L25/03242 ,  G06N3/048 ,  G06N20/10 ,  H04L2025/03458 ,  H04L2025/03464

    Abstract: A decoder for decoding a signal received through a transmission channel represented by a channel matrix using a search sphere radius. The decoder comprises a radius determination device for determining a search sphere radius from a preliminary radius. The radius determination device is configured to: i. apply a machine learning algorithm to input data derived from the received signal, the channel matrix and a current radius, the current radius being initially set to the preliminary radius, which provides a current predicted number of lattice points associated with the current radius; ii. compare the current predicted number of lattice points to a given threshold; iii. update the current radius if the current predicted number of lattice points is strictly higher than the given threshold, the current radius being updated by applying a linear function to the current radius; Steps i to iii are iterated until a termination condition is satisfied, the termination condition being related to the current predicted number, the radius determination device being configured to set the search sphere radius to the current radius in response to the termination condition being satisfied.

    Devices and methods for adaptive decoding and core scrambling in multi-core fiber transmission systems
    7.
    发明授权
    Devices and methods for adaptive decoding and core scrambling in multi-core fiber transmission systems 有权

    公开(公告)号：US11641251B2

    公开(公告)日：2023-05-02

    申请号：US17274421

    申请日：2019-09-04

    Applicant: INSTITUT MINES-TELECOM

    Inventor： Ghaya Rekaya ,  Akram Abouseif ,  Yves Jaouen

    IPC: H04B10/079 ,  H04L1/00 ,  H04L1/20

    Abstract: A decoder for determining an estimate of a vector of information symbols carried by optical signals propagating along a multi-core fiber in an optical fiber transmission channel according to two or more cores is provided. The decoder is implemented in an optical receiver. The optical signals are encoded using a space-time coding scheme and/or scrambled by at least one scrambling device arranged in the optical fiber transmission channel according to a predefined scrambling function. The decoder comprises a processing unit configured to adaptively: determine, in response to a temporal condition, one or more channel quality indicators from the optical signals; determine a decoding algorithm according to a target quality of service metric and on the one or more channel quality indicators; update the predefined scrambling function and/or the space-time coding scheme depending on the target quality of service metric and on the one or more channel quality indicators. The decoder further comprises a symbol estimation unit configured to determine an estimate of a vector of information symbols by applying the decoding algorithm to the optical signals.

    Optical transmission system and method for core scrambling for multicore optical fibers
    8.
    发明授权
    Optical transmission system and method for core scrambling for multicore optical fibers 有权

    公开(公告)号：US11637631B2

    公开(公告)日：2023-04-25

    申请号：US17050351

    申请日：2019-04-10

    Applicant: INSTITUT MINES-TELECOM

    Inventor： Ghaya Rekaya ,  Akram Abouseif ,  Yves Jaouen

    IPC: H04J14/02 ,  H04B10/2581 ,  H04B10/2507 ,  H04B10/50 ,  H04B10/516 ,  H04B10/60

    Abstract: The various embodiments provide an optical transmission system comprising an optical transmitter configured to transmit data over an optical fiber transmission channel made of a multi-core fiber, optical signals carrying the data propagate along the multi-core fiber according to two or more cores, each core being associated with one or more core parameters, wherein the optical transmission system comprises: a scrambling configuration device configured to determine a scrambling function depending on one or more of the core parameters associated with the two or more cores, and at least one scrambling device arranged in the optical fiber transmission channel for scrambling the two or more cores, each of the at least one scrambling device being configured to determine permuted cores by applying the scrambling function to the two or more cores and to redistribute the optical signals according to the permuted cores.

    Devices and methods for parallelized recursive block decoding
    9.
    发明授权
    Devices and methods for parallelized recursive block decoding 有权

    公开(公告)号：US11294674B2

    公开(公告)日：2022-04-05

    申请号：US17297994

    申请日：2019-11-21

    Applicant: INSTITUT MINES-TELECOM

    Inventor： Ghaya Rekaya

    IPC: G06F9/30 ,  G06F9/46

    Abstract: A decoder for determining an estimate of a vector of information symbols carried by a signal received through a transmission channel represented by a channel matrix is provided. The decoder includes a block division unit configured to divide the vector of information symbols into two or more sub-vectors, each sub-vector being associated with a block level; two or more processors configured to determine, in parallel, candidate sub-vectors and to store the candidate sub-vectors in a first stack. Each processor is configured to determine at least a candidate sub-vector by applying a symbol estimation algorithm and to store each candidate sub-vector with a decoding metric and the block level associated with the candidate sub-vector. The decoding metric is lower than or equal to a decoding metric threshold. A processor among the two or more processors is configured to determine at least a candidate vector from candidate sub-vectors stored in the first stack, the candidate vector being associated with a cumulated decoding metric and to update the decoding metric threshold from the cumulated decoding metric.

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