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公开(公告)号：US11335985B2
公开(公告)日：2022-05-17
申请号：US17254496
申请日：2019-06-17
Applicant: THALES , CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE , CENTRE NATIONAL D'ETUDES SPATIALES
Inventor： Damien Pacaud , Etienne Laplanche , Serge Verdeyme , Olivier Tantot , Nicolas Delhote , Stéphane Bila , Aurélien Perigaud , Ludovic Carpentier
Abstract: A tunable microwave system includes at least two elements, each element being chosen from a propagating guide, an evanescent guide, a resonator, and at least one coupling device arranged between the two elements and configured to couple the two elements to each other, the coupling device having a holder having an aperture and having at least one elongate element the shape of which is elongate in a polarization direction contained in a plane of the aperture, the elongate element being securely fastened to the perimeter of the aperture at at least one end, the coupling device being configured to be rotatable about an axis substantially perpendicular to the plane of the aperture so as to modify a value of the polarization direction and so that the coupling between the two elements is dependent on the value of the polarization direction.
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公开(公告)号：US11313975B2
公开(公告)日：2022-04-26
申请号：US16762924
申请日：2018-11-14
Applicant: CENTRE NATIONAL D'ETUDES SPATIALES
Inventor： Nicolas Capet , François-Xavier Marmet
Abstract: An add-on device configured to reduce the power level of reflected paths of GNSS signals reaching a GNSS receiver's antenna, the associated GNSS receiver set, some equipment embedding the add-on device, and the associated method to reduce the power level of reflected GNSS signals are provided. The GNSS signals are transmitted according to a first polarization, and the add-on device comprises a material configured to be transparent to the first polarization and to reflect GNSS signals polarized according to a second polarization orthogonal to the first polarization.
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83.发明授权公开(公告)号：US11237274B2
公开(公告)日：2022-02-01
申请号：US16357259
申请日：2019-03-18
Applicant: THALES , CENTRE NATIONAL D'ETUDES SPATIALES
Inventor： Guillaume Carrie , Céline Berland , Franck Barbiero
Abstract: A method is provided for estimating the parameters of useful signal and multi-path signals originating from a radiolocation signal emitted by a satellite, a location device comprising at least two sensors able to receive the signal. The method comprises the steps of: correlating the signal received by the sensors with a local code by means of correlators, constructing, for each sensor, a sampled intercorrelation function intercorrelating the signal received with the local code, determining a spatio-temporal intercorrelation function on the basis of the concatenation of the intercorrelation functions obtained in the previous step for each sensor, estimating parameters representative of the useful signal and of the multi-path signals by applying a maximum likelihood algorithm, the representative parameters including at least one complex amplitude estimated independently for each sensor.
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公开(公告)号：US20210048537A1
公开(公告)日：2021-02-18
申请号：US16964033
申请日：2019-01-17
Applicant: CENTRE NATIONAL D'ETUDES SPATIALES
Inventor： François-Xavier MARMET
Abstract: A Global Navigation Satellite System (GNSS) positioning techniques is provided. A method to improve the time required to compute a position measurement in a GNSS receiver, and the time required to make this position measurement accurate is also provided. The method comprises computing a snapshot PVT (Position Velocity and Time) measurement, and use it to reduce the time required to acquire new signals to compute a conventional PVT measurement. A receiver implementing the method is further provided.
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85.发明申请公开(公告)号：US20210003715A1
公开(公告)日：2021-01-07
申请号：US16977022
申请日：2019-03-12
Applicant: CENTRE NATIONAL D'ETUDES SPATIALES
Inventor： Marion AUBAULT
IPC: G01S19/30 , H04B17/345 , G01S19/37 , G01S19/22
Abstract: Method and device to decode a GNSS signal in a GNSS receiver include a channel decoder, wherein the GNSS receiver is configured to: determine parameters relative to a statistical propagation channel model, the statistical propagation channel model being a Prieto channel model or a Perez-Fontan channel model, compute a statistical channel attenuation from the statistical propagation channel model using the parameters, compute LLRs from a detection function adapted to the statistical propagation channel model using the computed statistical channel attenuation, and use the said LLRs to feed the channel decoder.
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Patent Agency Ranking
公开(公告)号：US10782414B2
公开(公告)日：2020-09-22
申请号：US15185993
申请日：2016-06-17
Applicant: CENTRE NATIONAL D'ETUDES SPATIALES
Inventor： Sébastien Rougerie , Marion Roudier , Lionel Ries , Laurent Lestarquit
IPC: G01S19/07 , G06F9/451 , G01S19/43 , G01S19/32 , G01S19/39 , G01S19/33 , G01S19/22 , G01S19/41 , G01S19/25 , G06F3/0484 , G06F8/38
Abstract: The invention discloses a receiver of GNSS positioning signals which has embedded computer logic to select between a first operating mode, which uses all available frequencies, and a second operating mode, which uses only part of the available frequencies but in combination with available correction data. The selection is based on a comparison of an index of quality of reception at the receiver and a computed or predicted precision/confidence level of the corrections. A plurality of corrections types are possible, including a type using a local model and a type using collaborative corrections. In some embodiments, a selection and/or a combination of a plurality of local models may be made to optimize the accuracy of the corrections.
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公开(公告)号：US10739471B2
公开(公告)日：2020-08-11
申请号：US15738926
申请日：2016-06-22
Applicant: CENTRE NATIONAL D'ETUDES SPATIALES
Inventor： Denis Laurichesse
Abstract: The invention discloses a receiver and a method to process navigation signals from one or more GNSS constellation, wherein an observation model and a measurement model allow a direct calculation of the carrier phase ambiguities. More specifically, in a triple frequency implementation, the receiver calculates in turn the extrawidelane, widelane and narrowlane ambiguities. The code and carrier phase biases can also be directly calculated. Thanks to the invention a quicker acquisition and tracking of a precise position, which will also be less noisy than a prior art solution, especially in some embodiments of the invention using a RAIM and/or a gap-bridging function. Also, code smoothing using the Doppler and low latency clock synchronization allow to decrease the noise levels of the precise point navigation solutions.
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公开(公告)号：US10585195B2
公开(公告)日：2020-03-10
申请号：US15686266
申请日：2017-08-25
Applicant: CENTRE NATIONAL D'ETUDES SPATIALES
Inventor： François-Xavier Marmet , Joël Dantepal
IPC: G01S19/22 , H04B1/709 , H04B1/7113
Abstract: Receiver and method for receiving one or more RF signals, the RF signals comprising a component relative to a direct propagation path and, depending on a propagation environment, one or more additional components relative to reflected propagation paths, the receiver comprising a calculation circuit configured to: compute at least a first correlation function (310) between the received signal and at least a replica of a RF signal generated at the receiver, and for at least an output of said first correlation function: perform a cepstrum transform (410), search for one or more reflected propagation paths from the output of the cepstrum transform (411), and when reflected propagation paths are detected, determine the associated propagation characteristics (412), and remove the contribution of the detected reflected propagation paths from one of the received signal or the output of the first correlation function.
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公开(公告)号：US20200064625A1
公开(公告)日：2020-02-27
申请号：US16461358
申请日：2017-11-17
Applicant: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE , CENTRE NATIONAL D'ETUDES SPATIALES , UNIVERSITE DE VERSAILLES SAINT-QUENTIN-EN-YVELINES , SORBONNE UNIVERSITE
Inventor： Nicolas ROUANET , Jean-François HOCHEDEZ
Abstract: A method implemented by computer for simulating an optical system includes the steps consisting in: a) defining a set of light rays or beams at the input (e) of the optical system, each the light ray or beam being represented by a first vector of parameters; and b) calculating, for each the light ray or beam at the input of the optical system, a light ray or beams at the output (s) of the optical system, represented by a second vector of parameters by applying, to each the light ray or beam at the input of the optical system, one and the same nonlinear function, termed the transmission function, representative of the optical system as a whole. A computer program product for the implementation of such a method is also provided.
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90.发明申请公开(公告)号：US20190293803A1
公开(公告)日：2019-09-26
申请号：US16357259
申请日：2019-03-18
Applicant: THALES , CENTRE NATIONAL D'ETUDES SPATIALES
Inventor： Guillaume CARRIE , Céline BERLAND , Franck BARBIERO
IPC: G01S19/22
Abstract: A method is provided for estimating the parameters of useful signal and multi-path signals originating from a radiolocation signal emitted by a satellite, a location device comprising at least two sensors able to receive the signal. The method comprises the steps of: correlating the signal received by the sensors with a local code by means of correlators, constructing, for each sensor, a sampled intercorrelation function intercorrelating the signal received with the local code, determining a spatio-temporal intercorrelation function on the basis of the concatenation of the intercorrelation functions obtained in the previous step for each sensor, estimating parameters representative of the useful signal and of the multi-path signals by applying a maximum likelihood algorithm, the representative parameters including at least one complex amplitude estimated independently for each sensor.
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