公开(公告)号：US20170141788A1

公开(公告)日：2017-05-18

申请号：US15348247

申请日：2016-11-10

Applicant: INSTITUT MINES-TELECOM

Inventor： Mohamed-Achraf KHSIBA ,  Ghaya REKAYA BEN-OTHMAN ,  Asma MEJRI

IPC: H03M7/30 ,  H03M13/00

CPC classification number: H03M7/3082 ,  H03M13/616 ,  H04L25/0204 ,  H04L25/0246 ,  H04L25/03242 ,  H04L2025/03426 ,  H04W88/02

Abstract: Embodiments of the invention provides a decoder for decoding a signal received through a transmission channel in a communication system, said signal carrying information symbols selected from a given alphabet and being associated with a signal vector, said transmission channel being represented by a channel matrix, wherein said decoder comprises: a sub-block division unit (301) configured to divide the received signal vector into a set of sub-vectors in correspondence with a division of a matrix related to said channel matrix; a candidate set estimation unit (305) for recursively determining candidate estimates of sub-blocks of the transmitted signal corresponding to said sub-vectors, each estimate of a given sub-block being determined from at least one candidate estimate of the previously processed sub-blocks, wherein said candidate set estimation unit is configured to determine a set of candidate estimates for at least one sub-block of the transmitted signal by applying at least one iteration of a decoding algorithm using the estimates determined for the previously processed sub-blocks, the number of candidate estimates determined for said sub-block being strictly inferior to the cardinal of the alphabet and superior or equal to two, the decoder further comprising a signal estimation unit (306) for calculating an estimate of the transmitted signal from said candidate estimates determined for said sub-blocks.

公开(公告)号：US20250096862A1

公开(公告)日：2025-03-20

申请号：US18727199

申请日：2023-01-03

Applicant: INSTITUT MINES TELECOM

Inventor： Aymen Ktari ,  Hadi GHAUCH ,  Ghaya REKAYA BEN-OTHMAN

IPC: H04B7/0456 ,  H04B17/309

Abstract: A method for selecting beams in a Millimeter-Wave MIMO system, using at least a transmitter antennas codebook indexing a plurality of beam patterns and a receiver antennas codebook indexing a plurality of beam patterns, at least one beam pattern being selected among said transmitter antennas codebook and at least one beam pattern being selected among said receiver antennas codebook, said selected beam patterns forming one or more pair of beams, said pair forming a channel for transmitting information between the transmitter and receiver antennas, with at least the following steps: sounding only a subset of beam pair, measuring a transmission quality parameter of said subset beam pairs to be indexed in an matric, using a learning model to select the beam pair having the maximum value of transmission quality parameter to form the channel for transmitting information between the transmitter and receiver antennas.

公开(公告)号：US20180175972A1

公开(公告)日：2018-06-21

申请号：US15844734

申请日：2017-12-18

Applicant: INSTITUT MINES-TELECOM

Inventor： Asma MEJRI ,  Ghaya REKAYA BEN-OTHMAN ,  Mohammed-Achraf KHSIBA

IPC: H04L1/06 ,  H04B7/0417 ,  H04L25/02

Abstract: Embodiments of the invention provide a decoder for decoding a signal received through a transmission channel in a communication system, said signal comprising a vector of information symbols, said transmission channel being represented by an upper triangular matrix, wherein the decoder comprises: a processing unit (309) configured to determine a set of division parameters depending on at least one division metric derived from components of said upper triangular matrix; a decoding unit (311) configured to divide said upper triangular matrix into two or more sub-matrices using said set of division parameters in accordance with a division of said vector of information symbols into two or more sub-vectors, and to determine at least one estimate of each sub-vector of information symbols by applying a symbol estimation algorithm, wherein the decoder is configured to determine at least one estimate of said vector of information symbols from the estimates of said sub-vectors of information symbols.

公开(公告)号：US20180175971A1

公开(公告)日：2018-06-21

申请号：US15836162

申请日：2017-12-08

Applicant: INSTITUT MINES-TELECOM

Inventor： Asma MEJRI ,  Ghaya REKAYA BEN-OTHMAN ,  Mohammed-Achraf KHSIBA

IPC: H04L1/06 ,  H04B7/0413 ,  H04W4/00

CPC classification number: H04L1/0643 ,  H04B7/0413 ,  H04B7/0669 ,  H04B7/0891 ,  H04L1/0668 ,  H04L25/03191 ,  H04L25/03961 ,  H04W4/70 ,  H04W84/045

Abstract: Embodiments of the invention provide a decoder for decoding a signal received through a transmission channel in a communication system, said signal comprising a vector of information symbols, wherein the decoder comprises: a processing unit (307) configured to determine at least one candidate set of division parameters and to perform a division of said vector of information symbols into a set of sub-vectors in association with each candidate set of division parameters, each pair of sub-vectors being associated with a division metric; a selection unit (309) configured to select one of said candidate sets of division parameters according to a selection criterion depending on said division metric; and a decoding unit (311) configured to determine at least one estimate of each sub-vector associated with said selected set of division parameters by applying a symbol estimation algorithm, wherein the decoder is configured to determine at least one estimate of the vector of information symbols from said at least one estimate of each sub-vector of information symbols.

公开(公告)号：US20170187445A1

公开(公告)日：2017-06-29

申请号：US15390057

申请日：2016-12-23

Applicant: INSTITUT MINES-TELECOM

Inventor： Mohamed-Achraf KHSIBA ,  Ghaya REKAYA BEN-OTHMAN ,  Asma MEJRI

IPC: H04B7/08 ,  H04B7/0413

CPC classification number: H04B7/08 ,  H04B7/0413 ,  H04L1/0631 ,  H04L25/03242

Abstract: Embodiments of the invention provide a decoder (10) for decoding a signal received through a transmission channel in a communication system, the signal carrying information symbols selected from a given set of values and being associated with a signal vector, the transmission channel being represented by a channel matrix. The decoder comprises : a sub-block division unit (12) configured to divide the received signal vector into a set of sub-vectors in correspondence with a division of a matrix related to said channel matrix ; at least one weighting coefficient calculation unit (14) configured to calculate a sub-block weighting coefficient for each sub-vector, at least one symbol estimation unit (11) for recursively determining estimated symbols representative of the transmitted symbols carried by the data signal from information stored in a stack. The at least one symbol estimation unit is configured to apply at least one iteration of a sequential decoding algorithm, the sequential decoding algorithm comprising iteratively filling a stack by expanding child nodes of a selected node of a decoding tree comprising a plurality of nodes, each node of the decoding tree corresponding to a candidate component of a symbol of at least a part of the received signal and each node being assigned an initial metric. The symbol estimation unit is further configured to calculate a modified metric for at least one node of the expanded child nodes from the metric associated with the at least one node and from the sub-block weighting coefficient calculated for the sub-vector to which the at least one node belongs, symbol estimation unit being configured to assign the modified metric to the at least one node.

公开(公告)号：US20240120979A1

公开(公告)日：2024-04-11

申请号：US18274729

申请日：2022-02-03

Applicant: INSTITUT MINES TELECOM

Inventor： Ghaya REKAYA BEN-OTHMAN ,  Aymen ASKRI ,  Chao ZHANG

IPC: H04B7/06 ,  H04B17/336

CPC classification number: H04B7/0626 ,  H04B7/063 ,  H04B7/0632 ,  H04B17/336

Abstract: A priority-resource-limited CoMP scheme is proposed based on a coordination priority index of users which comes into play to perform cooperation set selection and resource allocation in small cell networks. The CoMP control unit (CCU) configures and then transmits to the donor (serving) Transmission/Reception Point (TRP) the coordination priority index which is determined as a function of the required Bit Rate for that specific User Equipment and the SINR or the CQI. The donor Transmission/Reception Point (TRP) then transmits the coordination priority indexes sent by the CCU to the corresponding User Equipment (UE)s. The configuration of the coordination priority index allows the User Equipment to select a subset of Channel State Information reports or Channel State Information quantities to report so that the threshold index of the coordination priority is met.

公开(公告)号：US20170294986A1

公开(公告)日：2017-10-12

申请号：US15475400

申请日：2017-03-31

Applicant: INSTITUT MINES-TELECOM

Inventor： Mohamed-Achraf KHSIBA ,  Ghaya REKAYA BEN-OTHMAN

IPC: H04L1/00 ,  H04L25/02 ,  H04L5/00

CPC classification number: H04L1/0054 ,  H04B7/0413 ,  H04L1/0048 ,  H04L5/006 ,  H04L25/0242 ,  H04L25/03242

Abstract: Embodiments of the invention provide a decoder for decoding a signal received through a transmission channel in a communication system, said signal comprising a vector of information symbols, said transmission channel being represented by a channel matrix, wherein the decoder comprises: an initial radius determination unit (307) configured to determine an initial radius; a symbol estimation unit (309) configured to iteratively determine a current radius to search a lattice point inside a current spherical region defined by said current radius, said current radius being initially set to said initial radius, said symbol estimation unit (309) being configured, for each lattice point found in said current spherical region, to store said lattice point in association with a metric, said symbol estimation unit (309) being further configured to update said current radius using a linear function, said linear function having a slope parameter strictly inferior to one, The decoder being configured to determine at least one estimate of said vector of information symbols from at least one of the lattice points found by the symbol estimation unit (309).

公开(公告)号：US20170187433A1

公开(公告)日：2017-06-29

申请号：US15389765

申请日：2016-12-23

Applicant: INSTITUT MINES-TELECOM

Inventor： Mohammed-Achraf KHSIBA ,  Ghaya REKAYA BEN-OTHMAN ,  Asma MEJRI

IPC: H04B7/04 ,  H04L27/26 ,  H04B7/06

CPC classification number: H04B7/0413 ,  H04B7/0697 ,  H04L1/0031 ,  H04L1/0643 ,  H04L25/03006 ,  H04L27/2649 ,  H04W84/042 ,  H04W84/12

Abstract: Embodiments of the invention provide a decoder for decoding a signal represented by a vector of information symbols received through a transmission channel in a communication system, said the transmission system being represented by a channel state matrix, said information symbols being selected from a given set of values carrying a set of information bits, wherein said decoder comprises: a division unit (202) configured to divide the channel state matrix into a number of sub-blocks of column vectors, in accordance with a division of said vector of information symbols into a number of sub-vectors; a permutation unit (203) configured to determine a set of permuted channel state matrices by permuting said sub-blocks of column vectors, the permutation unit (203) being further configured to select at least one permuted channel state matrix among said set of permuted channel state matrices according to a selection criterion; a sub-block decoding unit (207) configured to determine a transformed signal from said signal and said at least one permuted channel state matrix and determine at least one estimate of each sub-vector of information symbols from said transformed signal by applying at least one iteration of a decoding algorithm; The decoder being configured to determine at least one estimate of a vector of transmitted information symbols from said at least one estimate of each sub-vector of information symbols.

公开(公告)号：US20170187432A1

公开(公告)日：2017-06-29

申请号：US15389612

申请日：2016-12-23

Applicant: INSTITUT MINES-TELECOM

Inventor： Asma MEJRI ,  Mohammed-Achraf KHSIBA ,  Ghaya REKAYA BEN-OTHMAN

IPC: H04B7/04 ,  H04L27/26 ,  H04B7/06

CPC classification number: H04B7/0413 ,  H04B7/0697 ,  H04L1/04 ,  H04L1/06 ,  H04L25/03 ,  H04L27/2649 ,  H04W84/042 ,  H04W84/12

Abstract: Embodiments of the invention provide a decoder for decoding a data signal received through a transmission channel in a communication system, said transmission channel being represented by an upper triangular matrix, said signal carrying transmitted symbols, each symbol carrying a set of information bits, wherein said decoder comprises: a processing unit (213) configured to determine at least one sub-block decoding parameter given a target quality of service metric; A sub-block decoding unit (214) configured to divide said data signal into a number of sub-vectors based on said at least one sub-block decoding parameter in accordance with a division of said upper triangular matrix into a number of sub-matrices, said sub-block decoding unit (214) being further configured to determine at least one estimate of each sub-vector of transmitted symbols from said sub-vectors, and determine an estimate of the transmitted symbols from said estimates.

公开(公告)号：US20170149533A1

公开(公告)日：2017-05-25

申请号：US15355311

申请日：2016-11-18

Applicant: INSTITUT MINES-TELECOM

Inventor： Asma MEJRI ,  Mohammed-Achraf KHSIBA ,  Ghaya REKAYA BEN-OTHMAN

IPC: H04L1/00 ,  H04L25/03

CPC classification number: H04L1/0052 ,  H04L25/03184 ,  H04L25/03191 ,  H04L25/03203 ,  H04L25/03305 ,  H04L25/03891

Abstract: There is provided a decoder for sequentially decoding a data signal received through a transmission channel in a communication system, said data signal carrying transmitted symbols, said decoder comprising a symbol estimation unit (301) configured to determine estimated symbols representative of the transmitted symbols carried by the received signal from information stored in a stack, said symbol estimation unit (301) being configured to iteratively fill the stack by expanding child nodes of a selected node of a decoding tree comprising a plurality of nodes, each node of the decoding tree corresponding to a candidate component of a symbol of said data signal and each node being assigned a metric, the stack being filled at each iteration with a set of expanded child nodes and being ordered by increasing values of the metrics assigned to the nodes, the selected node for each iteration corresponding to the node being assigned the lowest metric in the stack, the decoder comprising a metric determination unit (302) configured to determine an initial metric for each child node of said set of expanded child nodes, wherein the decoder further comprises a modified metric calculation unit (303) configured to calculate a modified metric for at least one of the expanded child nodes from the metric associated with said expanded child node and a weighting coefficient, said weighting coefficient being a function of the level of said node in the decoding tree, the decoder assigning said modified metric to said at least one of the expanded child nodes.