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1. 发明授权

US10291438B2 Methods and devices for decoding data signals 有权
公开(公告)号：US10291438B2
公开(公告)日：2019-05-14
申请号：US15476009
申请日：2017-03-31
申请人： INSTITUT MINES-TELECOM
发明人： Asma Mejri , Mohamed-Achraf Khsiba , Ghaya Rekaya Ben-Othman
IPC分类号： H04L25/02 , H04L25/03 , H04L27/06 , H04L1/06 , H04B7/0413
摘要： An exemplary decoder is provided for decoding a signal received through a transmission channel in a communication system. The exemplary decoder comprises a transformation unit configured to determine a set of auxiliary channel matrices, each auxiliary channel matrix being determined by performing a linear combination of at least one of the column vectors of the channel matrix; a decomposition unit configured to determine a decomposition of each auxiliary channel matrix into an upper triangular matrix and an orthogonal matrix; a matrix selection unit configured to select at least one auxiliary channel matrix among the set of auxiliary channel matrices depending on a selection criterion related to the components of the upper triangular matrices. The decoder determines at least one estimate of vector of information symbols from an auxiliary signal and from the upper triangular matrix corresponding to a selected auxiliary channel matrix by applying a decoding algorithm.

2. 发明授权

US09819404B2 Reordered sub-block decoding 有权
公开(公告)号：US09819404B2
公开(公告)日：2017-11-14
申请号：US15389765
申请日：2016-12-23
申请人： INSTITUT MINES-TELECOM
发明人： Mohamed-Achraf Khsiba , Ghaya Rekaya Ben-Othman , Asma Mejri
IPC分类号： H04B7/185 , H04B7/0413 , H04B7/06 , H04L27/26 , H04W84/04 , H04W84/12
CPC分类号： H04B7/0413 , H04B7/0697 , H04L1/0031 , H04L1/0643 , H04L25/03006 , H04L27/2649 , H04W84/042 , H04W84/12
摘要： 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.

3. 发明授权

US10284334B2 Methods and devices for sequential sphere decoding 有权
公开(公告)号：US10284334B2
公开(公告)日：2019-05-07
申请号：US15475400
申请日：2017-03-31
申请人： INSTITUT MINES-TELECOM
发明人： Mohamed-Achraf Khsiba , Ghaya Rekaya Ben-Othman
IPC分类号： H04L5/00 , H04L1/00 , H04L25/03 , H04L25/02 , H04B7/0413
摘要： 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).

4. 发明授权

US10560222B2 Methods and devices for sub-block decoding data signals 有权
公开(公告)号：US10560222B2
公开(公告)日：2020-02-11
申请号：US15844734
申请日：2017-12-18
申请人： INSTITUT MINES-TELECOM
发明人： Asma Mejri , Ghaya Rekaya Ben-Othman , Mohamed-Achraf Khsiba
IPC分类号： H04L1/06 , H04B7/0417 , H04L25/02 , H04L25/03 , H04B7/08 , H04L1/00
摘要： 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.

5. 发明授权

US09948364B2 Recursive sub-block decoding 有权
公开(公告)号：US09948364B2
公开(公告)日：2018-04-17
申请号：US15389612
申请日：2016-12-23
申请人： INSTITUT MINES-TELECOM
发明人： Asma Mejri , Mohamed-Achraf Khsiba , Ghaya Rekaya Ben-Othman
IPC分类号： H04B7/00 , H04B7/0413 , H04B7/06 , H04L27/26 , H04L1/04 , H04L1/06 , H04L25/03 , H04W84/04 , H04W84/12
CPC分类号： H04B7/0413 , H04B7/0697 , H04L1/04 , H04L1/06 , H04L25/03 , H04L27/2649 , H04W84/042 , H04W84/12
摘要： 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.

6. 发明授权

US10833801B2 Space-time coding for communication systems 有权
公开(公告)号：US10833801B2
公开(公告)日：2020-11-10
申请号：US15568177
申请日：2016-04-27
申请人： INSTITUT MINES-TELECOM
发明人： Ghaya Rekaya-Ben Othman , Asma Mejri , Mohamed-Achraf Khsiba
IPC分类号： H04L1/00 , H04L1/06 , H03M13/00 , H04B7/0456 , H04B7/06 , H04B7/08
摘要： 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.

7. 发明授权

US10284276B2 Weighted sequential decoding 有权
公开(公告)号：US10284276B2
公开(公告)日：2019-05-07
申请号：US15390057
申请日：2016-12-23
申请人： INSTITUT MINES-TELECOM
发明人： Mohamed-Achraf Khsiba , Ghaya Rekaya Ben-Othman , Asma Mejri
IPC分类号： H04B7/08 , H04B7/0413 , H04L25/03 , H04L1/06
摘要： 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.

8. 发明授权

US10200153B2 Parameterized sequential decoding 有权
公开(公告)号：US10200153B2
公开(公告)日：2019-02-05
申请号：US15355311
申请日：2016-11-18
申请人： INSTITUT MINES-TELECOM
发明人： Asma Mejri , Mohamed-Achraf Khsiba , Ghaya Rekaya Ben-Othman
IPC分类号： H04L1/00 , H04L25/03
摘要： 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.

9. 发明授权

US10116326B2 Semi-exhaustive recursive block decoding method and device 有权
公开(公告)号：US10116326B2
公开(公告)日：2018-10-30
申请号：US15348247
申请日：2016-11-10
申请人： INSTITUT MINES-TELECOM
发明人： Mohamed-Achraf Khsiba , Ghaya Rekaya Ben-Othman , Asma Mejri
IPC分类号： H03M7/30 , H03M13/00 , H04L25/03 , H04W88/02 , H04L25/02
摘要： 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.

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