Patents by Inventor Alexander M. Jacques
Alexander M. Jacques 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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Publication number: 20220320710Abstract: Systems and methods for enhanced fault tolerance for a radio frequency identification (RFID) phased array antenna are provided. The systems include a RFID reader that includes (i) a phased array antenna having N antenna elements; and (ii) a controller operatively connected to the phased array antenna. The controller is configured to (1) monitor a characteristic for each antenna element of a set of the N antenna elements; (2) based on the characteristic, detect a fault of a faulty antenna element of the set of the N antenna elements; and (3) responsive to detecting the fault of the faulty antenna element of the set of the N antenna elements, adjust a parameter of at least one other antenna element of the N antenna elements, wherein the parameter is a weight applied to a signal that is transmitted to or received at an antenna element.Type: ApplicationFiled: March 31, 2021Publication date: October 6, 2022Inventors: Benjamin J. Bekritsky, Michael J. Koch, Alexander M. Jacques
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Patent number: 11210480Abstract: Methods and devices for performing dynamic compensation of a phased array RFID reader are disclosed herein. An example method includes configuring an RFID reader having an antenna array to compensate for determined antenna element phase-shift errors. The method includes exciting a reference antenna element of the antenna array, emitting an emitted signal, receiving the emitted signal via a receiver antenna element of the antenna array, and generating a received signal. The method further includes determining, by a processor, a phase shift of the received signal relative to the emitted signal, and determining a phase-shift error. The method then includes configuring the RFID reader to compensate for the determined phase-shift error associated with the receiver antenna element in response to receiving an RFID tag signal.Type: GrantFiled: December 20, 2019Date of Patent: December 28, 2021Assignee: Zebra Technologies CorporationInventors: Michael J Koch, Alexander M. Jacques, Camilo A. Gaitan Parra
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Publication number: 20210192156Abstract: Methods and devices for performing dynamic compensation of a phased array RFID reader are disclosed herein. An example method includes configuring an RFID reader having an antenna array to compensate for determined antenna element phase-shift errors. The method includes exciting a reference antenna element of the antenna array, emitting an emitted signal, receiving the emitted signal via a receiver antenna element of the antenna array, and generating a received signal. The method further includes determining, by a processor, a phase shift of the received signal relative to the emitted signal, and determining a phase-shift error. The method then includes configuring the RFID reader to compensate for the determined phase-shift error associated with the receiver antenna element in response to receiving an RFID tag signal.Type: ApplicationFiled: December 20, 2019Publication date: June 24, 2021Inventors: Michael J. Koch, Alexander M. Jacques, Camilo A. Gaitan Parra
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Patent number: 9836630Abstract: An RFID tag reading system and method accurately and rapidly determine true bearings of RFID tags associated with items in a controlled area. An RFID reader has an array of antenna elements and a plurality of RF transceivers. A controller controls the transceivers by steering a primary transmit beam over the controlled area to each tag, by steering a primary receive beam at a primary steering angle from each tag, by steering a plurality of secondary receive beams at different secondary steering angles that are offset from the primary steering angle by receiving secondary receive signals from each tag, and by processing the secondary receive signals to determine a true bearing for each tag. Bidirectional communication between the reader and a tag is conducted over a single inventory round in which the tag is read a plurality of times by the primary and the secondary receive beams.Type: GrantFiled: March 31, 2014Date of Patent: December 5, 2017Assignee: Symbol Technologies, LLCInventors: Benjamin J Bekritsky, Alexander M Jacques, Michael J Koch, Charles B Swope
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Patent number: 9477865Abstract: A radio frequency (RF) identification (RFID) tag reading system and method accurately determine true bearings of RFID tags associated with items in a controlled area. An RFID reader has an array of antenna elements and a plurality of RF transceivers. A controller controls the transceivers by steering a primary transmit beam over the controlled area by transmitting a primary transmit signal to each tag, and steering a primary receive beam at a primary steering angle by receiving a primary receive signal from each tag. The controller thereupon steers a plurality of secondary receive offset beams at different secondary steering angles that are offset from the primary steering angle by receiving secondary receive offset signals from each tag, and by processing the offset signals to determine a true bearing for each tag.Type: GrantFiled: December 13, 2013Date of Patent: October 25, 2016Assignee: Symbol Technologies, LLCInventors: Michael J Koch, Benjamin J Bekritsky, Alexander M Jacques, Charles B Swope
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Patent number: 9361494Abstract: An RFID tag reading system and method estimate true bearings of RFID tags associated with items located in a scan zone directly underneath an overhead array of antenna elements. A controller energizes a plurality of diametrically opposite antenna elements to yield electric fields having polarizations, and switches each antenna element between mutually orthogonal polarizations. A primary transmit beam and a primary receive beam are steered at a primary steering angle over the scan zone, and a plurality of secondary receive beams are steered over the scan zone at different secondary steering angles that are offset from the primary steering angle by receiving secondary receive signals from each tag, and by processing the secondary receive signals to estimate a true bearing for each tag.Type: GrantFiled: May 9, 2014Date of Patent: June 7, 2016Assignee: Symbol Technologies, LLCInventors: Charles B Swope, Antonio Faraone, Alexander M Jacques
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Publication number: 20150323662Abstract: An RFID tag reading system and method estimate true bearings of RFID tags associated with items located in a scan zone directly underneath an overhead array of antenna elements. A controller energizes a plurality of diametrically opposite antenna elements to yield electric fields having polarizations, and switches each antenna element between mutually orthogonal polarizations. A primary transmit beam and a primary receive beam are steered at a primary steering angle over the scan zone, and a plurality of secondary receive beams are steered over the scan zone at different secondary steering angles that are offset from the primary steering angle by receiving secondary receive signals from each tag, and by processing the secondary receive signals to estimate a true bearing for each tag.Type: ApplicationFiled: May 9, 2014Publication date: November 12, 2015Inventors: Charles B. SWOPE, Antonio FARAONE, Alexander M. JACQUES
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Publication number: 20150278565Abstract: An RFID tag reading system and method accurately and rapidly determine true bearings of RFID tags associated with items in a controlled area. An RFID reader has an array of antenna elements and a plurality of RF transceivers. A controller controls the transceivers by steering a primary transmit beam over the controlled area to each tag, by steering a primary receive beam at a primary steering angle from each tag, by steering a plurality of secondary receive beams at different secondary steering angles that are offset from the primary steering angle by receiving secondary receive signals from each tag, and by processing the secondary receive signals to determine a true bearing for each tag. Bidirectional communication between the reader and a tag is conducted over a single inventory round in which the tag is read a plurality of times by the primary and the secondary receive beams.Type: ApplicationFiled: March 31, 2014Publication date: October 1, 2015Inventors: BENJAMIN J. BEKRITSKY, ALEXANDER M. JACQUES, MICHAEL J. KOCH, CHARLES B. SWOPE
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Patent number: 9111190Abstract: A radio frequency identification (RFID) tag reading system having a phased antenna array accurately locates RFID tags in a controlled area, by steering an interrogating beam over the controlled area to interrogate the tags and generate return modulated RF signals. A primary receiver steers a primary receive beam at a primary steering angle that is fixed during each tag interrogation. A primary demodulator demodulates and reconstructs the received return modulated signals. A secondary receiver, independently of the primary receiver, steers a secondary receive beam at a plurality of secondary steering angles. A secondary correlator/demodulator demodulates the combined return modulated signals, and utilizes the reconstructed signal reconstructed by the primary demodulator at each of the secondary steering angles. Both the primary and the secondary receivers cooperate to accurately locate the same tag.Type: GrantFiled: January 16, 2013Date of Patent: August 18, 2015Assignee: Symbol Technologies, LLCInventors: Alexander M. Jacques, Benjamin J. Bekritsky, Michael J. Koch
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Publication number: 20150169910Abstract: A radio frequency (RF) identification (RFID) tag reading system and method accurately determine true bearings of RFID tags associated with items in a controlled area. An RFID reader has an array of antenna elements and a plurality of RF transceivers. A controller controls the transceivers by steering a primary transmit beam over the controlled area by transmitting a primary transmit signal to each tag, and steering a primary receive beam at a primary steering angle by receiving a primary receive signal from each tag. The controller thereupon steers a plurality of secondary receive offset beams at different secondary steering angles that are offset from the primary steering angle by receiving secondary receive offset signals from each tag, and by processing the offset signals to determine a true bearing for each tag.Type: ApplicationFiled: December 13, 2013Publication date: June 18, 2015Inventors: Michael J. Koch, Benjamin J. Bekritsky, Alexander M. Jacques, Charles B. Swope
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Publication number: 20140197928Abstract: A radio frequency identification (RFID) tag reading system having a phased antenna array accurately locates RFID tags in a controlled area, by steering an interrogating beam over the controlled area to interrogate the tags and generate return modulated RF signals. A primary receiver steers a primary receive beam at a primary steering angle that is fixed during each tag interrogation. A primary demodulator demodulates and reconstructs the received return modulated signals. A secondary receiver, independently of the primary receiver, steers a secondary receive beam at a plurality of secondary steering angles. A secondary correlator/demodulator demodulates the combined return modulated signals, and utilizes the reconstructed signal reconstructed by the primary demodulator at each of the secondary steering angles. Both the primary and the secondary receivers cooperate to accurately locate the same tag.Type: ApplicationFiled: January 16, 2013Publication date: July 17, 2014Applicant: SYMBOL TECHNOLOGIES, INC.Inventors: ALEXANDER M. JACQUES, BENJAMIN J. BEKRITSKY, MICHAEL J. KOCH
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Patent number: 8737363Abstract: A subscriber unit for use in a multiple access spread-spectrum communication system includes a spread spectrum radio interface, responsive to a rate function signal from a base station, and first and second despreaders. The base station assigns the rate function spread-spectrum message channels and the first despreader recovers and modifies an information signal one of the spread spectrum message channels. The information channel mode is then modified for processing by the second despreader, with the second despreader supporting a different information signal rate. The subscriber unit has a capability of communicating with a dynamically changing a transmission rate of an information signal which includes multiple spread spectrum message channels.Type: GrantFiled: March 7, 2011Date of Patent: May 27, 2014Assignee: InterDigital Technology CorporationInventors: Fatih M. Ozluturk, Alexander M. Jacques, Gary R. Lomp, John Kowalski
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Publication number: 20140111311Abstract: A method and apparatus for operating an RFID scanner is provided herein. During operation, an RFID scanner will utilize beamforming techniques to appropriately beamform an interrogation signal. A first beamforming scheme will be used for a first task (e.g., EAS, inventory management, point-of-sale mode scanning of a first area, . . . , etc.) and a second beamforming scheme will be used for a second task.Type: ApplicationFiled: October 24, 2012Publication date: April 24, 2014Applicant: SYMBOL TECHNOLOGIES, INC.Inventors: MICHAEL J. KOCH, BENJAMIN J. BEKRITSKY, ALEXANDER M. JACQUES, NEERAL SESHADRI
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Patent number: 8582625Abstract: A method for receiving at least one of a plurality of channels in a communication signal includes receiving a spread spectrum communication signal, demodulating the spread spectrum communication signal using a rake receiver and a pseudo-noise pilot signal for a selected channel, despreading the demodulated signal of a selected channel, performing a QPSK hard decision in association with a complex conjugate of the despread signal to produce a correction signal, and mixing the correction signal to a rake receiver output to remove relative phase error without an absolute phase reference, to produce a corrected signal.Type: GrantFiled: August 24, 2012Date of Patent: November 12, 2013Assignee: Interdigital Technology CorporationInventors: Fatih M. Ozluturk, David K. Mesecher, Alexander M. Jacques
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Publication number: 20120320952Abstract: A method for receiving at least one of a plurality of channels in a communication signal includes receiving a spread spectrum communication signal, demodulating the spread spectrum communication signal using a rake receiver and a pseudo-noise pilot signal for a selected channel, despreading the demodulated signal of a selected channel, performing a QPSK hard decision in association with a complex conjugate of the despread signal to produce a correction signal, and mixing the correction signal to a rake receiver output to remove relative phase error without an absolute phase reference, to produce a corrected signal.Type: ApplicationFiled: August 24, 2012Publication date: December 20, 2012Applicant: INTERDIGITAL TECHNOLOGY CORPORATIONInventors: Fatih M. Özlütürk, David K. Mesecher, Alexander M. Jacques
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Patent number: 8254431Abstract: A wireless transmit/receive unit (WTRU) for carrier offset recovery. An adaptive matched filter produces a filtered signal. A rake receiver provides relative path values of multipath components. A mixer generates channel impulse response estimates. A channel despreader despreads the filtered signal using the pseudo-noise signal generated to produce a despread channel signal of the selected channel. A pilot channel despreader despreads the filtered signal using a pseudo-noise signal generator to produce a despread pilot signal of the pilot channel. A hard decision processor determines a symbol value of the despread channel signal. A complex conjugate processor generates a complex conjugate of the symbol value as a correction signal. A phase-locked loop produces a phase correction signal to recover carrier offset.Type: GrantFiled: April 13, 2011Date of Patent: August 28, 2012Assignee: Interdigital Technology CorporationInventors: Fatih M Ozluturk, David K Mesecher, Alexander M Jacques
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Publication number: 20110188546Abstract: A wireless transmit/receive unit (WTRU) for carrier offset recovery. An adaptive matched filter produces a filtered signal. A rake receiver provides relative path values of multipath components. A mixer generates channel impulse response estimates. A channel despreader despreads the filtered signal using the pseudo-noise signal generated to produce a despread channel signal of the selected channel. A pilot channel despreader despreads the filtered signal using a pseudo-noise signal generator to produce a despread pilot signal of the pilot channel. A hard decision processor determines a symbol value of the despread channel signal. A complex conjugate processor generates a complex conjugate of the symbol value as a correction signal. A phase-locked loop produces a phase correction signal to recover carrier offset.Type: ApplicationFiled: April 13, 2011Publication date: August 4, 2011Applicant: INTERDIGITAL TECHNOLOGY CORPORATIONInventors: Fatih M. Özlütürk, David K. Mesecher, Alexander M. Jacques
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Patent number: 7949037Abstract: A base station for carrier offset recovery. An adaptive matched filter produces a filtered signal. A rake receiver provides relative path values of multipath components. A mixer generates channel impulse response estimates. A channel despreader despreads the filtered signal using the pseudo-noise signal generated to produce a despread channel signal of the selected channel. A pilot channel despreader despreads the filtered signal using a pseudo-noise signal generator to produce a despread pilot signal of the pilot channel. A hard decision processor determines a symbol value of the despread channel signal. A complex conjugate processor generates a complex conjugate of the symbol value as a correction signal. A phase-locked loop produces a phase correction signal to recover carrier offset.Type: GrantFiled: September 18, 2006Date of Patent: May 24, 2011Assignee: InterDigital Technology CorporationInventors: Fatih M Ozluturk, David K Mesecher, Alexander M Jacques
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Patent number: 7110443Abstract: A receiver and base station for producing phase-corrected channel signals. An adaptive matched filter produces a filtered signal by using a weighting signal. A rake receiver produces a filter weighting signal using a pseudo-noise signal generator. A channel despreader despreads the filtered signal using the pseudo-noise signal generated to produce a despread channel signal of the selected channel. A pilot channel despreader despreads the filtered signal using a pseudo-noise signal generator to produce a despread pilot signal of the pilot channel. A hard decision processor receives the despread channel signal of the selected channel and produces a correction signal. A phase-locked loop utilizes at least the despread pilot signal and produces a phase correction signal which is applied to produce phase-corrected channel signals.Type: GrantFiled: July 26, 2005Date of Patent: September 19, 2006Assignee: InterDigital Technology CorporationInventors: Fatih M. Ozluturk, David K. Mesecher, Alexander M. Jacques
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Patent number: 6944209Abstract: The present invention is a user equipment (UE), including a receiver and method for receiving one of a plurality of channels in a communication signal. An adaptive matched filter produces a filtered signal by using a weighting signal. A rake receiver produces a filter weighting signal using a pseudo-noise signal generator. A channel despreader despreads the filtered signal using the pseudo-noise signal generated to produce a despread channel signal of the selected channel. A pilot channel despreader despreads the filtered signal using a pseudo-noise signal generator to produce a despread pilot signal of the pilot channel. A hard decision processor receives the despread channel signal of the selected channel and produces a correction signal. A phase-locked loop utilizes at least the despread pilot signal and produces a phase correction signal which is applied to produce phase-corrected channel signals.Type: GrantFiled: January 26, 2004Date of Patent: September 13, 2005Assignee: InterDigital Technology CorporationInventors: Faith M. Özlütürk, David K. Mesecher, Alexander M. Jacques