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：US20180083732A1

公开(公告)日：2018-03-22

申请号：US15568177

申请日：2016-04-27

Applicant: INSTITUT MINES-TELECOM

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

IPC: H04L1/00 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H03M13/00

Abstract: There is provided a method of generating a space-time block code (STBC) for encoding a digital data sequence comprising a set of independent symbols to be transmitted through a transmission channel in a communication system, the space-time block code being represented by a set of linear dispersion matrices in a linear dispersion representation, each linear dispersion matrix comprising components having complex values, the method comprising, generating at least some of the linear dispersion matrices depending on component-wise conditions related to a set of selected pairs of the linear dispersion matrices, each pair comprising a first linear dispersion matrix and a second linear dispersion matrix, said component-wise conditions comprising a component-wise condition between the components of the first linear dispersion matrix and the components of the second linear dispersion matrix.

公开(公告)号：US20170264392A1

公开(公告)日：2017-09-14

申请号：US15514576

申请日：2015-09-28

Applicant: INSTITUT MINES TELECOM

Inventor： Asma MEJRI ,  Ghaya REKAYA-BEN OTHMAN

IPC: H04L1/00 ,  H04L25/03

CPC classification number: H04L1/0052 ,  H04L1/0054 ,  H04L25/03197 ,  H04L25/03203 ,  H04L25/03891 ,  H04L27/38 ,  H04L2025/03426

Abstract: Methods, systems, and computer program products for decoding a received data signal in a communication system by iteratively constructing a decoding tree, each node of said decoding tree corresponding to a component of a symbol of said data signal, and being associated with a metric, the construction of the decoding tree implementing at least one iteration of the following steps, for a current node of the tree stored in the top of a stack: generating (102) a reference child node of said current node from said vector representing the received data signal, from the reference child node, generating (106) a first neighbor child node by subtracting a positive integer parameter from the value of the reference node, and a second neighbor child node by adding said positive integer parameter to the value of the reference child node; storing (108) in said stack three child nodes deriving from the reference child node and from said first and second neighbor child nodes, each child node being stored in the stack in association with node information comprising a predetermined metric, the nodes in the stack being ordered by increasing values of metrics; removing (109) the current node from said stack; selecting (111) the top node of said stack as the new current node; wherein said method further comprises determining an estimation of said data signal from the node information stored in said stack.

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.