Patents by Inventor Sébastien De Rivaz
Sébastien De Rivaz has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11815591Abstract: The present invention relates to a method for estimating a distance between nodes of an LPWA network. First and second nodes, respectively, successively transmit a narrow band signal at a plurality of carrier frequencies to each other. The second and first nodes, respectively, receive the transmitted signals and demodulate them into baseband signals. Complex values representative of a forward-backward function of the transmission channel between two nodes are obtained from the baseband demodulated signals. These complex values are then provided to a previously supervisingly trained neural network, the neural network giving an estimation of the distance separating the first node and the second node. The present invention also relates to a method for estimating the position of a node in an LPWA network using the above-noted distance estimation method.Type: GrantFiled: September 11, 2020Date of Patent: November 14, 2023Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Florian Wolf, Sébastien De Rivaz, François Dehmas, Mohamed Sana
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Patent number: 11668785Abstract: A method for locating a connected object within an LPWA network using a plurality of base stations. The connected object transmits packets in RF frequency channels forming a virtual band being scanned once in the uplink direction and once in the downlink direction in a symmetrical manner. The base stations receiving the signal perform an RF to intermediate frequency translation and then a baseband translation in digital mode. The phase differences of arrival for each pair of base stations and the attenuation coefficients of each transmission channel between the connected object and each base station enable a composite transfer function to be constructed for each pair of base stations. The peaks of highest amplitude are detected in the corresponding impulse responses and the distance differences between the connected object and the different base stations are derived therefrom. The position of the object is then estimated by hyperbolic trilateration.Type: GrantFiled: May 12, 2021Date of Patent: June 6, 2023Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Florian Wolf, Sébastien De Rivaz, François Dehmas
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Publication number: 20210356553Abstract: A method for locating a connected object within an LPWA network using a plurality of base stations. The connected object transmits packets in RF frequency channels forming a virtual band being scanned once in the uplink direction and once in the downlink direction in a symmetrical manner. The base stations receiving the signal perform an RF to intermediate frequency translation and then a baseband translation in digital mode. The phase differences of arrival for each pair of base stations and the attenuation coefficients of each transmission channel between the connected object and each base station enable a composite transfer function to be constructed for each pair of base stations. The peaks of highest amplitude are detected in the corresponding impulse responses and the distance differences between the connected object and the different base stations are derived therefrom. The position of the object is then estimated by hyperbolic trilateration.Type: ApplicationFiled: May 12, 2021Publication date: November 18, 2021Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Florian WOLF, Sébastien DE RIVAZ, François DEHMAS
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Publication number: 20210080559Abstract: The present invention relates to a method for estimating a distance between nodes of an LPWA network. A first node (a second node resp.) successively transmits a narrow band signal at a plurality of carrier frequencies (421). The second (the first resp.) node receives the transmitted signals and demodulates them into baseband (422). Complex values representative of a forward-backward function of the transmission channel between two nodes are obtained (423) from the baseband demodulated signals. These complex values are then provided to a previously supervisingly trained neural network (425), the neural network giving an estimation of the distance separating the first node and the second node. The present invention also relates to a method for estimating the position of a node in an LPWA network using said distance estimation method.Type: ApplicationFiled: September 11, 2020Publication date: March 18, 2021Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Florian WOLF, Sébastien DE RIVAZ, François DEHMAS, Mohamed SANA
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Publication number: 20200403193Abstract: Methods and apparatus for fabricating a lightweight high power battery. The battery comprises an active structure including an anode electrode, a cathode electrode, and a separator material arranged between the anode electrode and the cathode electrode, a liquid electrolyte; and a non-metallic pouch arranged to encapsulate the active structure and the liquid electrolyte.Type: ApplicationFiled: March 6, 2019Publication date: December 24, 2020Applicant: President and Fellows of Harvard CollegeInventors: Mihai Duduta, David Clarke, Robert J. Wood, Sebastien de Rivaz
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Patent number: 10416006Abstract: This method includes the steps of a) providing a tool configured to cooperated with each object in a cooperation position, the tool being equipped with a transmitter of a signal of Ultra-Wide Band type, b) arranging at least one receiver configured to provide data (X1, X2, X3, X4) representative of the corresponding cooperation position, and forming a random variable, noted X, c) acquiring at least M times the data (X1, X2, X3, X4) for each of the cooperation positions, where M is a natural number greater than a predetermined value, d) calculating the expectation of X, noted E[X], e) arranging the tool (1) in a current position, f) acquiring at least one current piece of data, provided by the at least one receiver for the current position, g) applying an identification criterion including E[X] to identify the current position from among the K cooperation positions.Type: GrantFiled: December 18, 2015Date of Patent: September 17, 2019Assignee: COMMISSARIAT À L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventor: Sébastien De Rivaz
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Publication number: 20160178408Abstract: This method includes the steps of a) providing a tool configured to cooperated with each object in a cooperation position, the tool being equipped with a transmitter of a signal of Ultra-Wide Band type, b) arranging at least one receiver configured to provide data (X1, X2, X3, X4) representative of the corresponding cooperation position, and forming a random variable, noted X, c) acquiring at least M times the data (X1, X2, X3, X4) for each of the cooperation positions, where M is a natural number greater than a predetermined value, d) calculating the expectation of X, noted E[X], e) arranging the tool (1) in a current position, f) acquiring at least one current piece of data, provided by the at least one receiver for the current position, g) applying an identification criterion including E[X] to identify the current position from among the K cooperation positions.Type: ApplicationFiled: December 18, 2015Publication date: June 23, 2016Applicant: COMMISSARIAT À L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventor: Sébastien DE RIVAZ
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Patent number: 9083447Abstract: A receiver of electromagnetic and a method for receiving electromagnetic signals transmitted in a frequency band having a predetermined upper limit fMAX and representing a stream of information by means of a modulation of pulses at a predetermined average pulse repetition frequency fPRP. The receiver includes an input stage including a band-pass filter and applys processing without changing frequency of the signals and a sampler of the processed signals operating at a sampling frequency fe that is an integer multiple of the average pulse repetition frequency fPRP and less than said upper limit fMAX.Type: GrantFiled: November 21, 2006Date of Patent: July 14, 2015Assignee: COMMISSARIAT A. L'ENERGIE ATOMIQUEInventors: Sébastien De Rivaz, Manuel Pezzin, Laurent Ouvry
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Patent number: 8238408Abstract: A method for processing, in an ultra-wide band receiver, a sampled rectified ultra-wide band received signal, including: at least one sliding correlation between a selection of samples of the sampled ultra-wide band received signal and a correlation sequence, the sliding correlation carrying out a succession of n elementary correlation steps, n being an integer larger than or equal to 2, at a frequency f, between the selection of samples and the correlation sequence, an elementary correlation producing a series of intermediate correlation samples, and summation of the intermediate correlation samples delivered by each of the n elementary correlation steps to form n correlation samples which form a correlation vector.Type: GrantFiled: May 11, 2007Date of Patent: August 7, 2012Assignee: Commissariat a l'Energie AtomiqueInventors: Samuel Dubouloz, Sebastien De Rivaz, Mathieu Sambuq
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Patent number: 7769072Abstract: The invention relates to a learning process for an ultra wideband communication system with M transmission antennas and N reception antennas and in which the information is modulated on L possible positions comprising the following steps: a) transmit a series of Nseq learning pulses from each emission antenna to all reception antennas. b) for each reception antenna j, estimate the M composite responses of series of emitted pulses that arrive at this reception antenna j, each composite response being estimated by eliminating the effects of other antennas. c) estimate correlations between the different channels.Type: GrantFiled: January 11, 2006Date of Patent: August 3, 2010Assignee: Commissariat a l'Energie AtomiqueInventors: Chadi Abou Rjeily, Norbert Daniele, Sebastien De Rivaz
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Publication number: 20100142647Abstract: A method for processing, in an ultra-wide band receiver, a sampled rectified ultra-wide band received signal, including: at least one sliding correlation between a selection of samples of the sampled ultra-wide band received signal and a correlation sequence, the sliding correlation carrying out a succession of n elementary correlation steps, n being an integer larger than or equal to 2, at a frequency f, between the selection of samples and the correlation sequence, an elementary correlation producing a series of intermediate correlation samples, and summation of the intermediate correlation samples delivered by each of the n elementary correlation steps to form n correlation samples which form a correlation vector.Type: ApplicationFiled: May 11, 2007Publication date: June 10, 2010Applicant: COMMISSARIAT A L' ENERGIE ATOMIQUEInventors: Samuel Dubouloz, Sebastien De Rivaz, Mathieu Sambuq
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Publication number: 20060182166Abstract: The invention relates to a learning process for an ultra wideband communication system with M transmission antennas and N reception antennas and in which the information is modulated on L possible positions comprising the following steps: a) transmit a series of Nseq learning pulses from each emission antenna to all reception antennas. b) for each reception antenna j, estimate the M composite responses of series of emitted pulses that arrive at this reception antenna j, each composite response being estimated by eliminating the effects of other antennas. c) estimate correlations between the different channels.Type: ApplicationFiled: January 11, 2006Publication date: August 17, 2006Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUEInventors: Chadi Abou Rjeily, Norbert Daniele, Sebastien De Rivaz
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Publication number: 20050041725Abstract: This invention relates to a receiver of an ultra wide band signal and the associated method. The receiver comprises: means (7) of outputting two orthogonal signals by projection of the received signal (R(t)) onto two periodic orthogonal functions with frequency approximately equal to the central frequency of the received signal, sampling means (7) of two orthogonal signals to output a discrete data stream (X(k), Y(k)) with two components, estimating means (8) for calculating a reference signal starting from the discrete data stream with two dimensions, and comparison means (9) for comparing all or some of the data contained in the discrete data stream with all or part of the data forming the reference signal. The invention is applicable to high-speed transmissions and positioning of transmitters/receivers.Type: ApplicationFiled: May 18, 2004Publication date: February 24, 2005Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUEInventors: Sebastien De Rivaz, Dominique Morche, Manuel Pezzin, Julien Keignart