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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.
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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.
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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
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.
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公开(公告)号：US20170366222A1
公开(公告)日：2017-12-21
申请号：US15620208
申请日：2017-06-12
Applicant: INSTITUT MINES-TELECOM / TELECOM BRETAGNE
Inventor： Jérémy NADAL , Charbel ABDEL NOUR , Amer BAGHDADI
CPC classification number: H04B1/7102 , H04B2201/709718 , H04L27/2623 , H04L27/265 , H04L27/2698
Abstract: A receiver for Filter Bank Multicarrier frequency spread signals such as FBMC, FBMC/OQAM, OFDM, comprises a linear phase rotation module adapted to introduce a linear phase rotation to a received time domain signal, a discrete Fourier transform and a Finite Impulse response digital filter. The coefficients of the digital filter define a shift of the frequency response of the prototype filter of the receiver, and the coefficients of the digital filter are fixed so as to compensate the linear phase rotation introduced by the filter. The frequency shift introduced may be equal to the reciprocal of a power of two of the modulation sub carrier spacing.
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135.发明申请公开(公告)号：US20170346627A1
公开(公告)日：2017-11-30
申请号：US15532953
申请日：2016-01-08
Applicant: INSTITUT MINES-TELECOM
Inventor： Romain ALLEAUME
CPC classification number: H04L9/0858 , H04J14/0227 , H04L9/0844 , H04L9/0852 , H04L2209/24
Abstract: A method of communicating a classical message M between a first party A and a second distant party B over a public channel F, comprises the steps of sharing a key between the parties, the shared key K comprising a short-term-secure key KS and/or a long-term-secure key KL; at A, encoding M as a quantum codeword, A using K to encode M into a first encrypted codeword belonging to a publicly known quantum code; communicating the first encrypted codeword from A to B over F whose output is a second codeword; unitarily transforming the second codeword into a third codeword by using a N-mode interferometer controlled by B, placed at the output of F and keyed by K; determining an estimate of M, at B, by performing a measurement on the third codeword and by processing the measurement using K.
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Patent Agency Ranking
公开(公告)号：US20170324766A1
公开(公告)日：2017-11-09
申请号：US15526790
申请日：2015-11-10
Applicant: INSTITUT MINES-TELECOM/TELECOM SUDPARIS
Inventor： Gustavo GONZALEZ GRANADILLO , Hervé DEBAR
IPC: H04L29/06
CPC classification number: H04L63/1441 , H04L63/1433 , H04L63/20
Abstract: A method of selecting, for at least one service of an information system and depending service(s), at least one countermeasure to be implemented against at least one cyber attack, the method includes: identifying elements of the service exposed to the cyber attack(s), calculating a risk mitigation level of each countermeasure with respect to the cyber attack(s), ranking the countermeasure(s) on the basis of a parameter which is at least a function of the risk mitigation level, simulating the impact of the countermeasure(s) on the service and the depending service(s), the countermeasure to be implemented being selected at least as a function of result of the simulation.
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公开(公告)号：US20170307927A1
公开(公告)日：2017-10-26
申请号：US15523489
申请日：2015-10-22
Inventor： Laurent DUPONT , Suman MANNA
IPC: G02F1/137 , G02F1/1343
Abstract: A reflecting cell including at least two substrates each covered by an electrode and facing each other, the substrates delimitating between them a volume which separates them and which is filled with a bistable liquid crystal-type material with a threshold field, for example a cholesteric liquid crystal, both electrodes being intended to be connected to a voltage source. This cell is characterized in that at least one of the electrodes is formed by associating a pattern, which does not entirely cover the surface of the substrate considered, and a conducting layer which covers the surface of the substrate considered, the conductivity of the material of the layer being lower than that of the material of the pattern.
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138.发明申请公开(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
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.
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139.发明申请公开(公告)号：US20170264367A1
公开(公告)日：2017-09-14
申请号：US15508775
申请日：2015-09-04
Applicant: INSTITUT MINES-TELECOM
Inventor： Elie AWWAD , Ghaya REKAYA-BEN OTHMAN , Yves JAOUEN
IPC: H04B10/2581 , H04B7/0413 , H04B10/079
CPC classification number: H04B10/2581 , H04B7/0413 , H04B10/0795 , H04J14/04
Abstract: The invention relates to a mode selection method for a system for MIMO transmission on an optical fiber of multimode type. It comprises a step of measuring the transfer matrix of the transmission channel made up of a set of modes of the optical fiber (110), a step of transforming (120) the transfer matrix into a block diagonal matrix, each block being associated with a mode subset, a step of determining (130) the gain and/or the transmission capacity for each of the mode subsets, and a selection (140) of the mode subset corresponding to the highest gain and/or capacity, the MIMO transmission system then using only the modes of the subset thus selected to transmit on the optical fiber.The invention relates also to a core selection method for a system for MIMO transmission on optical fiber of multicore type.
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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.
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