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公开(公告)号：US10200153B2
公开(公告)日：2019-02-05
申请号：US15355311
申请日：2016-11-18
Applicant: INSTITUT MINES-TELECOM
Inventor： Asma Mejri , Mohamed-Achraf Khsiba , Ghaya Rekaya Ben-Othman
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.
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公开(公告)号：US10191347B2
公开(公告)日：2019-01-29
申请号：US15526046
申请日：2015-10-28
Inventor： Laurent Dupont , Suman Manna
IPC: G02F1/1335 , G02F1/137 , C09K19/38 , G02F1/13363 , G02F1/1347 , C09K19/36 , C09K19/52 , G02F1/1343
Abstract: The invention relates to a reflecting cell including at least two substrates covered by an electrode and facing each other, the substrates delimiting between them a volume which separates them and which is filled with a cholesteric liquid crystal-type material, both electrodes being intended to be connected to a voltage source. This cell includes at least one half-wave plate arranged between both substrates and dividing the volume into two compartments, each enclosing a part of a same cholesteric liquid crystal.
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公开(公告)号：US20190020473A1
公开(公告)日：2019-01-17
申请号：US16067054
申请日：2016-12-29
Applicant: THALES , INSTITUT MINES TELECOM , CELENO COMMUNICATIONS LTD
Inventor： Renaud MOLIÈRE , Christiane KAMENI NGASSA , François DELAVEAU , Claude LEMÉNAGER , Alain SIBILLE , Taghrid MAZLOUM , Nir SHAPIRA
IPC: H04L9/08 , H04B17/391 , H04B17/382 , H04B17/354 , H04L29/06
Abstract: A method for generating an encryption key is provided to encrypt data exchanged between a first user and a second user, wherein the key is determined from measurements of the transmission channel.
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公开(公告)号：US20180365195A1
公开(公告)日：2018-12-20
申请号：US16060947
申请日：2016-12-08
Applicant: INSTITUT MINES-TELECOM
Inventor： Olivier RIOUL , Sylvain GUILLEY
Abstract: A secret value estimation device is provided for determining an estimate of at least one secret value used by at least one cryptographic mechanism implemented in a cryptographic system from a statistical distribution of a set of multivariate leakage traces determined by a leakage traces statistical distribution unit. Each leakage trace being a vector comprises a plurality of random values, the number of said random values being an integer number superior or equal to 1, the statistical distribution being a function of parametric linear combinations of a set of leakage model basis vectors representing a multivariate leakage model, the number of basis vectors being an integer number superior or equal to 1, and the linear combinations being defined by a matrix of real values.
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125.发明授权公开(公告)号：US10116434B2
公开(公告)日：2018-10-30
申请号：US15539001
申请日：2014-12-24
Inventor： Venkat Chandar , Aslan Tchamkerten
IPC: H04L27/06 , H04L7/04 , H04L12/26 , H04B1/7075 , G06F17/15
Abstract: A method of detecting transient changes in the distribution of a discrete time series includes: operating in a sparse mode wherein, at sniff periods successively repeated at a first rate, at most K test phases are performed, K being an integer superior or equal to two, each test phase consisting of analyzing, by a sampling stopping time determination unit, samples of the time series captured by a sampler at sampling times according to a second rate which is higher than the first rate to provide a positive or negative result of the test phase. If the results of K successive test phases of a sniff period are each positive, the method switches to operate in a dense mode wherein the sampler is operated to continuously capture samples of the time series at sampling times according to the second sampling rate.
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Patent Agency Ranking
公开(公告)号：US10116326B2
公开(公告)日：2018-10-30
申请号：US15348247
申请日：2016-11-10
Applicant: INSTITUT MINES-TELECOM
Inventor： Mohamed-Achraf Khsiba , Ghaya Rekaya Ben-Othman , Asma Mejri
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.
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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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