公开(公告)号：US20210050918A1

公开(公告)日：2021-02-18

申请号：US17049308

申请日：2019-04-10

Applicant: INSTITUT MINES-TELECOM

Inventor： Ghaya REKAYA ,  Akram ABOUSEIF ,  Yves JAOUEN

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

Abstract: The various 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 optical signals, the optical signals propagating along the multi-core fiber according to two or more cores, the multi-core fiber being associated with fiber parameters and misalignment losses values, at least one scrambling device being arranged in the optical fiber transmission channel for scrambling the two or more cores according to a scrambling function, wherein the optical fiber transmission channel comprises a system configuration device configured to determine a core dependent loss value depending on the fiber parameters, at least one misalignment loss, a number of the at least one scrambling device, and the scrambling function.

公开(公告)号：US20210397450A1

公开(公告)日：2021-12-23

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.

公开(公告)号：US20220376789A1

公开(公告)日：2022-11-24

申请号：US17621422

申请日：2020-06-23

Applicant: INSTITUT MINES-TELECOM

Inventor： Akram ABOUSEIF ,  Ghaya REKAYA

IPC: H04B10/2581

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.

公开(公告)号：US20240030969A1

公开(公告)日：2024-01-25

申请号：US18026561

申请日：2021-09-24

Applicant: INSTITUT MINES TELECOM

Inventor： Ghaya REKAYA ,  Aymen ASKRI

IPC: H04B7/0456 ,  H04B7/0452

CPC classification number: H04B7/0456 ,  H04B7/0452

Abstract: A precoder for precoding a vector of information symbols to be sent to a plurality of users, the precoder includes a user ordering and grouping unit configured to group the plurality of users depending on one or more quality of service indicators and on modulation and coding parameters associated with the plurality of users, the user ordering and grouping unit being configured to divide a predefined upper triangular precoding matrix into a plurality of sub-matrices and to divide the vector of information symbols into a plurality of sub-vectors, each sub-vector comprising information symbols to be sent to a group of users, the sub-vectors being arranged according to an arbitrary order of the one or more quality of service indicators; a precoding unit configured to determine a perturbation vector according to the minimization of a transmit power metric, the perturbation vector comprising a plurality of perturbation sub-vectors, each perturbation sub-vector corresponding to a sub-vector of information symbols, the precoding unit being configured to determine an estimate of each perturbation sub-vector by applying a recursive search algorithm.

公开(公告)号：US20220253670A1

公开(公告)日：2022-08-11

申请号：US17620717

申请日：2020-06-24

Applicant: INSTITUT MINES-TELECOM

Inventor： Ghaya REKAYA ,  Aymen ASKRI

IPC: G06N3/04 ,  G06F17/16 ,  G06K9/62

Abstract: A lattice prediction device for predicting a number of lattice points falling inside a bounded region in a given vector space is provided. The bounded region is defined by a radius value, a lattice point representing a digital signal in a lattice constructed over the vector space. The lattice is defined by a lattice generator matrix comprising components. The lattice prediction device comprises a computation unit configured to determine a predicted number of lattice points by applying a machine learning algorithm to input data derived from the radius value and the components of lattice generator matrix.

公开(公告)号：US20220247605A1

公开(公告)日：2022-08-04

申请号：US17620715

申请日：2020-06-23

Applicant: INSTITUT MINES-TELECOM

Inventor： Ghaya REKAYA ,  Aymen ASKRI

IPC: H04L25/03 ,  G06N3/04 ,  G06N20/10

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.

公开(公告)号：US20220247460A1

公开(公告)日：2022-08-04

申请号：US17620716

申请日：2020-06-23

Applicant: INSTITUT MINES-TELECOM

Inventor： Ghaya REKAYA ,  Aymen ASKRI

IPC: 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.

公开(公告)号：US20210376929A1

公开(公告)日：2021-12-02

申请号：US17050351

申请日：2019-04-10

Applicant: INSTITUT MINES TELECOM

Inventor： Ghaya REKAYA ,  Akram ABOUSEIF ,  Yves JAOUEN

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

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.

公开(公告)号：US20210250094A1

公开(公告)日：2021-08-12

申请号：US17049023

申请日：2019-04-10

Applicant: INSTITUT MINES-TELECOM

Inventor： Ghaya REKAYA ,  Akram ABOUSEIF ,  Yves JAOUEN

IPC: H04B10/2581 ,  H04B10/2507 ,  H04B10/516 ,  G02B6/14

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, the multi-core fiber being associated with fiber parameters and misalignment losses values, wherein the optical transmission system comprises a system administration device configured to determine a core dependent loss value depending on the fiber parameters and misalignment losses values.

公开(公告)号：US20210058155A1

公开(公告)日：2021-02-25

申请号：US17050358

申请日：2019-04-10

Applicant: INSTITUT MINES-TELECOM

Inventor： Ghaya REKAYA ,  Akram ABOUSEIF ,  Yves JAOUEN

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

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.