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公开(公告)号：US20210014094A1
公开(公告)日：2021-01-14
申请号：US16971279
申请日：2019-02-28
Inventor： Jérémy NADAL , Charbel ABDEL NOUR , Amer BAGHDADI
IPC: H04L27/26
Abstract: A method and device to modulate an FBMC/OQAM signal, the device comprising at least one QAM mapper mapping a binary stream into complex symbols, a first and a second transmission chain. Each chain comprises: a precoder transposing respective sets of symbols into frequency domain real/imaginary samples, a phase rotator applying a phase quadrature keying to said samples, an FBMC modulator to modulate the output of the phase rotator into an FBMC symbol. The device further comprises an adder of the output of the first transmission chain with a delayed output of the second transmission chain, and is configured to insert guard interval sequences into the binary stream or into the symbols processed by the precoders. A corresponding radio communication equipment, computer program and readable medium is provided.
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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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公开(公告)号：US20200322196A1
公开(公告)日：2020-10-08
申请号：US16754741
申请日：2018-10-11
Inventor： Jérémy NADAL , Charbel ABDEL NOUR , Amer BAGHDADI
Abstract: An FBMC equalization and demodulation unit and corresponding method to process an FBMC signal includes FBMC symbols, each FBMC symbol comprising data mapped over M subcarriers, oversampled by a factor K, filtered by a prototype filter and transposed in the time-domain, comprising: a frequency domain transposition unit, configured to transpose a block of P*KM samples comprising at least one FBMC symbol into frequency domain samples, where P is an integer greater than one, an equalizer unit configured to multiply the frequency domain samples by one or more coefficients computed from a propagation channel estimate, at least one circular convolution unit, configured to perform P circular convolutions between subsets of the equalized samples and a frequency domain response of a frequency shifted version of the prototype filter, and adders, to sum corresponding outputs of each of the P circular convolutions.
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公开(公告)号：US20180176815A1
公开(公告)日：2018-06-21
申请号：US15835631
申请日：2017-12-08
Applicant: INSTITUT MINES-TELECOM / TELECOM BRETAGNE , Université Libanaise , Université Saint-Esprit de Kaslik
Inventor： Marie-Rita HOJEIJ , Joumana FARAH , Charbel ABDEL NOUR , Catherine DOUILLARD
CPC classification number: H04W28/0236 , H04B7/0626 , H04L25/0204 , H04W28/18 , H04W28/26 , H04W72/0453 , H04W72/121 , H04W72/1215 , H04W72/1226 , H04W72/1236
Abstract: A mechanism for attributing users to a plurality of sub bands in a time slot t in a multiple access communications system, said method comprising assigning a combination of users to a sub band on a Proportional Fairness basis, that is to say whichever combination of users maximizes a Proportional Fairness performance metric for that channel, where the performance metric is weighted by a weighting factor reflecting the difference for that user between a target throughput and a projected throughput.
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公开(公告)号：US20230140597A1
公开(公告)日：2023-05-04
申请号：US17917909
申请日：2021-04-06
Applicant: INSTITUT MINES TELECOM
Inventor： Jérémy NADAL , Charbel ABDEL NOUR , Amer BAGHDADI
Abstract: A device configured to perform a stage of circular convolutions in an Overlap-Save Filtered-Bank Multicarrier Communication (OS-FBMC) or Overlap-Save-Block FBMC (OSB-FBMC) receiver and the corresponding method, the stage of circular convolutions comprising P circular convolutions operated between subsets of input samples and frequency domain responses of a frequency shifted version of a prototype filter associated to an FBMC modulation having Cg coefficients, with P an integer greater than one, the device comprising at least one Finite Impulse Response filter implemented in the form of a transposed direct filter having at least Cg−1 taps numbered p=−Δ+1 to p=Δ with Δ = c g - 1 2 , wherein the multiplier coefficient of each tap p within the set of taps −Δ+1; 0 has an equal absolute value to the multiplier coefficient of tap (1−p) . An FBMC equalization and demodulation unit or an FBMC receiver comprising the device.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20210083814A1
公开(公告)日：2021-03-18
申请号：US17042453
申请日：2019-03-20
Inventor： Marie-Rita HOJEIJ , Charbel ABDEL NOUR , Joumana FARAH , Catherine DOUILLARD
Abstract: A mechanism is presented for attributing users to one or more of a plurality of sub-bands in a multiple access communications system, wherein in an initial assignment phase, a first user is selected for a sub band, for example on the basis of a user priority. Users having complementary channel gains to that of the first user are identified, and then a second sub-band user maximizing a performance metric reflecting the achieved throughput, and/or fairness across users, is selected to accompany the first user on that sub-band. The initial assignment phase may terminate once all users have been assigned to a sub-band once. After the first phase is complete, the first user for each sub-band may be the user whose achieved total throughput is furthest from a target throughput defined for that user, wherein each user is assigned to the remaining sub-band to which no first user is currently attributed offering the highest channel gain for that user. Mechanisms for determining user priority, making provisional and definitive power allocations, and performance metrics are proposed.
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7.发明申请公开(公告)号：US20210022088A1
公开(公告)日：2021-01-21
申请号：US16982007
申请日：2019-03-20
Inventor： Marie-Rita HOJEIJ , Charbel ABDEL NOUR , Joumana FARAH , Catherine DOUILLARD
Abstract: A method and system for assigning power to sub-bands in a multiple access communications system, where users are assigned iteratively to sub-bands, and at each iteration a provisional partial power budget is determined for the subset of sub-bands comprising the sub-bands to which users have been assigned in the present time slot and the sub-band under consideration in the sequence, where the fraction of the total available power determined as the provisional partial power budget corresponds to the fraction of the number of sub-bands in the subset from the total number of sub-bands to be assigned, and the provisional power allocation for the sub-band under consideration is obtained by performing a waterfilling distribution of the provisional partial power budget amongst the subset of the sub-bands, based on the channel gain of the users already assigned to sub-bands in the present time slot.
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8.发明申请公开(公告)号：US20210022089A1
公开(公告)日：2021-01-21
申请号：US17042464
申请日：2019-03-20
Inventor： Marie-Rita HOJEIJ , Charbel ABDEL NOUR , Joumana FARAH , Catherine DOUILLARD
Abstract: A system and method for assigning users to a particular sub band in a given time slot in a NOMA system, where whichever pair of users corresponds to the smallest “candidate pair user throughput deviation value”, reflecting the aggregate of the respective difference between the average throughput across all users (K) and the known throughput of each of the two users under consideration (k1k2), and each user attributed to a sub-band other than the selected sub-band. User pairs for consideration may consider all possible pairs, or may be limited to candidate pairs satisfying together, or comprising one or both users who satisfy a criterion such as channel gain, distance to a target, throughput or a combination of some or all of these factors. The power allocated to each sub-band may be attributed by a waterfilling algorithm.
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公开(公告)号：US20210021396A1
公开(公告)日：2021-01-21
申请号：US17042478
申请日：2019-03-20
Inventor： Marie-Rita HOJEIJ , Charbel ABDEL NOUR , Joumana FARAH , Catherine DOUILLARD
IPC: H04L5/00
Abstract: A method of determining a performance metric for a selection of a first user and a second user among a set of candidate users for attribution to a sub-band in a multiple access communications system based on Non-Orthogonal Multiple Access (NOMA), is provided wherein the first user (k1) and the second user (k2) are selected as the pair of candidate users corresponding to an extremum of the ratio between a first term reflecting the total throughput achievable by any pair of the candidate users assigned to the sub-band (s) under consideration, and a second term reflecting the known throughput achieved by that same pair of candidate users over a predetermined preceding period. Implementations include a method of determining a performance metric is presented for attributing users to one or more of a plurality of sub-bands in a multiple access communications system, wherein in an initial assignment phase for a specific sub-band, a first user is selected for that band on the basis of one or more criteria such as user priority. Then a second sub-band user maximizing or minimizing the performance metric.
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公开(公告)号：US20180048510A1
公开(公告)日：2018-02-15
申请号：US15673902
申请日：2017-08-10
Applicant: INSTITUT MINES-TELECOM / TELECOM BRETAGNE
Inventor： Jérémy NADAL , Charbel ABDEL NOUR , Amer BAGHDADI
IPC: H04L27/26
Abstract: An encoder architecture for UF-OFDM is provided, in which samples are first processed sub-band wise, and then resorted for sub-carrier-wise processing. The sub-carrier processing may comprise separate processing for the two extremity parts of the base band signal corresponding to the transient state of the UF-OFDM data stream and for a core part of the base band signal corresponding to the non-transient state of the UF-OFDM data stream, and then concatenated to obtain a UF-OFDM data stream. In certain embodiments a first extremity part of the base band signal corresponding to the transient state of the UF-OFDM data stream is calculated directly, and the other extremity part inferred from the core part and the first extremity part. The core and extremity part processors may be implemented with filters adapted to multiply each sample by a respective filter coefficient. Modifying these coefficients can introduce a frequency shift or convert the encoder for OFDM encoding.
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