Patents by Inventor Olivier Bernard André Seller
Olivier Bernard André Seller 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: 10305535Abstract: A radio receiver for processing digital chirp spread-spectrum modulated signals that comprise a plurality of frequency chirps that are cyclically time-shifted replicas of a base chirp profile, said time-shifts being an encoded representation of a transmitted message. Includes a soft demapping unit that is adapted for working on fully populated as well as on partial modulation sets, and implements a timing error correction loop that acts back both in the time domain and in the frequency domain.Type: GrantFiled: June 12, 2017Date of Patent: May 28, 2019Assignee: Semtech CorporationInventors: Olivier Bernard André Seller, Nicolas Sornin
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Patent number: 10148313Abstract: A wireless communication method in a network comprising a plurality of nodes including ranging masters, broadcasting a chirp-modulated ranging requests, and ranging slaves slave, replying with thereto with chirp-modulated ranging responses, whereby mobile nodes can locate themselves passively by listening to the request/reply exchanges, based on the respective time differences of arrival.Type: GrantFiled: June 13, 2017Date of Patent: December 4, 2018Assignee: Semtech CorporationInventors: Olivier Bernard André Seller, Nicolas Sornin
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Patent number: 10001555Abstract: A ranging and positioning system comprising transmitters and receiver nodes communicating together by chirp-modulated radio signals, that have a ranging mode in which ranging exchange of signals takes place between a master device and a slave device that leads to the evaluation of the range between them. The slave is arranged for recognizing a ranging request and transmit back a ranging response containing chirps that precisely aligned in time and frequency with the chirps in the ranging requests, whereupon the master can receive the ranging response, analyze the time and frequency the chirps contained therein with respect to his own time reference, and estimate a range to the slave.Type: GrantFiled: January 22, 2014Date of Patent: June 19, 2018Assignee: Semtech CorporationInventor: Olivier Bernard Andre Seller
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Publication number: 20180024224Abstract: Method of timing, in a receiver, a radio signal generated in and transmitted from a transmitter, the radio signal comprising a series of frequency chirps, the system including: receiving the radio signal from the transmitter; synthesizing projection vectors comprising a series of frequency chirps that are a complex-conjugate image of those comprised in the radio signal the projection vectors being time-shifted relative to one another by determined shift intervals of time; multiplying the received radio signal by the projection vectors and accumulating the results; interpolating the accumulating results to determine a peak time shift.Type: ApplicationFiled: June 16, 2017Publication date: January 25, 2018Inventor: Olivier Bernard André SELLER
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Publication number: 20180006680Abstract: A radio receiver for processing digital chirp spread-spectrum modulated signals that comprise a plurality of frequency chirps that are cyclically time-shifted replicas of a base chirp profile, said time-shifts being an encoded representation of a transmitted message. Includes a soft demapping unit that is adapted for working on fully populated as well as on partial modulation sets, and implements a timing error correction loop that acts back both in the time domain and in the frequency domain.Type: ApplicationFiled: June 12, 2017Publication date: January 4, 2018Inventors: Olivier Bernard André SELLER, Nicolas SORNIN
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Publication number: 20170339073Abstract: A wireless communication system, comprising one or several nodes (A) equipped by a wireless radio interface that is adapted for transmitting digital messages modulated in the form of a series of frequency chirps, for example, LoRa-modulated radio signals. The message is received simultaneously by several base stations (C, D, E), and a server (S) is arranged for dividing the frames by the diverse stations and recombining a corrected frame for the intended recipient (B) based on error codes. Advantageously, the base stations being adapt their timing error compensation strategy when the error codes indicate a corruption of the message.Type: ApplicationFiled: May 12, 2017Publication date: November 23, 2017Inventors: Ludovic CHAMPION, Olivier Bernard André SELLER
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Publication number: 20170324441Abstract: A wireless communication method in a network comprising a plurality of nodes including ranging masters, broadcasting a chirp-modulated ranging requests, and ranging slaves slave, replying with thereto with chirp-modulated ranging responses, whereby mobile nodes can locate themselves passively by listening to the request/reply exchanges, based on the respective time differences of arrival.Type: ApplicationFiled: June 13, 2017Publication date: November 9, 2017Inventors: Olivier Bernard André SELLER, Nicolas Sornin
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Patent number: 9800288Abstract: A wireless communication method in a network comprising one or several beacons and a plurality of end-points, comprising: sending by a beacon a timing message modulated according to a chirp spread spectrum format, receiving said timing message in one or several end-nodes a receiver, detecting said timing message aligning a local frequency reference and/or time reference of the end-node to the time reference of the transmitter by means of said timing message.Type: GrantFiled: March 2, 2016Date of Patent: October 24, 2017Assignee: Semtech CorporationInventors: Olivier Bernard Andre Seller, Nicolas Sornin
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Publication number: 20170276779Abstract: A ranging and positioning system comprising transmitters and receiver nodes communicating together by chirp-modulated radio signals, that have a ranging mode in which ranging exchange of signals takes place between a master device and a slave device that leads to the evaluation of the range between them. The slave is arranged for recognizing a ranging request and transmit back a ranging response containing chirps that precisely aligned in time and frequency with the chirps in the ranging requests, whereupon the master can receive the ranging response, analyze the time and frequency the chirps contained therein with respect to his own time reference, and estimate a range to the slave.Type: ApplicationFiled: June 13, 2017Publication date: September 28, 2017Inventor: Olivier Bernard André SELLER
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Patent number: 9647718Abstract: A wireless communication method between a plurality of end-points by a plurality of base stations, based on frames that have a CSS-modulated preamble followed by a data body modulated at a narrower bandwidth, either by CSS or by a UNB modulation. The system permit to avoid or mitigate collision between packets and to increase the network capacity, maintaining the simplicity of detection inherent of CSS modulation.Type: GrantFiled: September 9, 2015Date of Patent: May 9, 2017Assignee: Semtech CorporationInventor: Olivier Bernard André Seller
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Patent number: 9577702Abstract: A system and a method for time synchronization on a wireless network, based on the exchange of Chirp Spread Spectrum information. Time signals are broadcast from a master (40) to a plurality of slave devices (101, 102, 103). The modulation used includes a compensation of offsets in the master's system clock by symbol-wide frequency shifts that is particularly precise, fine and simple to implement. The system and method of the invention are particularly suitable for synchronizing a telecommunication cell network.Type: GrantFiled: September 9, 2015Date of Patent: February 21, 2017Assignee: Semtech CorporationInventor: Olivier Bernard Andre Seller
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Patent number: 9525454Abstract: A method of control of a plurality of end-points by a plurality of base stations, comprises issuing a frame by at least one end-point and sending the frame to at least one base station, sending a response frame from the base station to the end-point upon receiving the frame, the response frame comprising a plurality of downchirps, at least two sequences, each comprising a positive acknowledge and an increase rate and a positive acknowledgement and a decrease rate, and additional control sequences.Type: GrantFiled: September 9, 2015Date of Patent: December 20, 2016Assignee: Semtech CorporationInventor: Olivier Bernard Andre Seller
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Publication number: 20160261306Abstract: A wireless communication method in a network comprising one or several beacons and a plurality of end-points, comprising: sending by a beacon a timing message modulated according to a chirp spread spectrum format, receiving said timing message in one or several end-nodes a receiver, detecting said timing message aligning a local frequency reference and/or time reference of the end-node to the time reference of the transmitter by means of said timing message.Type: ApplicationFiled: March 2, 2016Publication date: September 8, 2016Inventors: Olivier Bernard Andre SELLER, Nicolas SORNIN
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Publication number: 20160094268Abstract: A method of control of a plurality of end-points by a plurality of base stations, comprises issuing a frame by at least one end-point and sending the frame to at least one base station, sending a response frame from the base station to the end-point upon receiving the frame, the response frame comprising a plurality of downchirps, at least two sequences, each comprising a positive acknowledge and an increase rate and a positive acknowledgement and a decrease rate, and additional control sequences.Type: ApplicationFiled: September 9, 2015Publication date: March 31, 2016Inventor: Olivier Bernard Andre Seller
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Publication number: 20160094270Abstract: A system and a method for time synchronization on a wireless network, based on the exchange of Chirp Spread Spectrum information. Time signals are broadcast from a master (40) to a plurality of slave devices (101, 102, 103). The modulation used includes a compensation of offsets in the master's system clock by symbol-wide frequency shifts that is particularly precise, fine and simple to implement. The system and method of the invention are particularly suitable for synchronizing a telecommunication cell network.Type: ApplicationFiled: September 9, 2015Publication date: March 31, 2016Inventor: Olivier Bernard Andre SELLER
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Publication number: 20160094269Abstract: A wireless communication method between a plurality of end-points by a plurality of base stations, based on frames that have a CSS-modulated preamble followed by a data body modulated at a narrower bandwidth, either by CSS or by a UNB modulation. The system permit to avoid or mitigate collision between packets and to increase the network capacity, maintaining the simplicity of detection inherent of CSS modulation.Type: ApplicationFiled: September 9, 2015Publication date: March 31, 2016Inventor: Olivier Bernard Andre SELLER
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Publication number: 20160003940Abstract: A ranging and positioning system comprising transmitters and receiver nodes communicating together by chirp-modulated radio signals, that have a ranging mode in which ranging exchange of signals takes place between a master device and a slave device that leads to the evaluation of the range between them. The slave is arranged for recognizing a ranging request and transmit back a ranging response containing chirps that precisely aligned in time and frequency with the chirps in the ranging requests, whereupon the master can receive the ranging response, analyze the time and frequency the chirps contained therein with respect to his own time reference, and estimate a range to the slave.Type: ApplicationFiled: January 22, 2014Publication date: January 7, 2016Inventor: Olivier Bernard Andre SELLER
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Patent number: 8699607Abstract: A receiver for receiving signals of a protocol in which traffic data is redundantly modulated onto both of two carriers according to a predetermined decision scheme, the receiver comprising: an input for receiving signals on the two carriers; a demodulator for demodulating the signals received on each of the two carriers to form two respective received data streams; first transformation logic for generating a first candidate set of traffic data by processing the received data streams by the functional inverse of the predetermined decision scheme; second transformation logic for generating a second candidate set of traffic data by aggregating corresponding bits of each of the received data streams; and a traffic data set selector for selecting data from either the first candidate set of traffic data or from the second candidate set of traffic data for further processing, the traffic data set selector being configured to make that selection in dependence on the relative strength with which signals on the two caType: GrantFiled: March 12, 2009Date of Patent: April 15, 2014Assignee: Cambridge Silicon Radio LimitedInventor: Olivier Bernard Andre Seller
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Patent number: 8687669Abstract: A signal receiver having a gain control circuit comprising: detection means configured to form a representation of the excess amplitude during a training period of a signal received by the receiver; a first gain stimulus generator configured to generate a first gain stimulus in dependence on the excess amplitude detected by the detection means during the training period; averaging means configured to estimate the average of the signal received by the receiver during the training period; a second gain stimulus generator configured to generate a second gain stimulus in dependence on the average estimated by the averaging means during the training period; and a gain control signal generator configured to generate a gain control signal for the receiver in dependence on the first gain stimulus and the second gain stimulus.Type: GrantFiled: August 27, 2009Date of Patent: April 1, 2014Assignee: Cambridge Silicon Radio LimitedInventors: Olivier Bernard Andre Seller, Nicolas Sornin, Damien Richard Smith
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Publication number: 20120243634Abstract: An encoder arranged to encode a data symbol for transmission by means of two carrier signals in accordance with an encoding scheme having the properties that: for a first carrier signal, a plurality of data symbols are mapped to a single modulation point in a constellation of modulation points; and for a second carrier signal, said plurality of data symbols are each mapped to a different modulation point in the constellation of modulation points.Type: ApplicationFiled: April 24, 2012Publication date: September 27, 2012Applicant: CAMBRIDGE SILICON RADIO LIMITEDInventor: Olivier Bernard Andre Seller