Patents by Inventor James Delfeld
James Delfeld 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: 11817922Abstract: Co-existence between an Orthogonal Time Frequency Space (OTFS) modulation system and a Long Term Evolution (LTE) system is achieved by generating a number of transmission beams for a first group of user equipment operating using LTE, and a second group of user equipment operating using the OTFS protocol, and transmitting a first group of data packets formatted according to the LTE protocol to the first group of user equipment and a second group of data packets formatted according to the OTFS protocol to the second group of user equipment. The transmissions are performed by precoding and modulating the first group of data packets according to an LTE modulation scheme, and precoding and modulating the second group of data packets according to an OTFS modulation scheme.Type: GrantFiled: August 5, 2022Date of Patent: November 14, 2023Assignee: Cohere Technologies, Inc.Inventors: Christian Ibars Casas, James Delfeld, Yoav Hebron, Shachar Kons
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Patent number: 11637663Abstract: Methods, systems and device for achieving synchronization in an orthogonal time frequency space (OTFS) signal receiver are described. An exemplary signal reception technique includes receiving an OTFS modulated wireless signal comprising pilot signal transmissions interspersed with data transmissions, calculating autocorrelation of the wireless signal using the wireless signal and a delayed version of the wireless signal that is delayed by a pre-determined delay, thereby generating an autocorrelation output, processing the autocorrelation filter through a moving average filter to produce a fine timing signal.Type: GrantFiled: November 29, 2021Date of Patent: April 25, 2023Assignee: Cohere Techologies, Inc.Inventors: Vamadevan Namboodiri, Karl Sanders, Yaron Rozenbaum, James Delfeld
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Patent number: 11632270Abstract: Device, methods and systems for aspects of channel estimation for orthogonal time frequency space (OTFS) modulation in wireless systems are described. In an aspect, a method for wireless communication may include receiving, using multiple receive antennas, from a number of user devices, non-orthogonal pilots wherein at least some transmissions of the non-orthogonal pilots from different user devices overlap in at least some time and frequency resources, estimating individual pilots from the number of user devices by computing a pilot separation filter for each antenna, and estimating the wireless channel at time and frequency resources used by the non-orthogonal pilots by filtering the receiving signal at the multiple receiver antennas.Type: GrantFiled: February 7, 2019Date of Patent: April 18, 2023Assignee: Cohere Technologies, Inc.Inventors: Shachar Kons, James Delfeld, Robert Fanfelle, Andreas Molisch, Yoav Hebron
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Patent number: 11533203Abstract: Methods, systems and devices for lattice reduction in decision feedback equalizers for orthogonal time frequency space (OTFS) modulation are described. An exemplary wireless communication method, implementable by a wireless communication receiver apparatus, includes receiving a signal comprising information bits modulated using OTFS modulation scheme. Each delay-Doppler bin in the signal is modulated using a quadrature amplitude modulation (QAM) mapping. The method also includes estimating the information bits based on an inverse of a single error covariance matrix of the signal, with the single error covariance matrix being representative of an estimation error for all delay-Doppler bins in the signal.Type: GrantFiled: August 23, 2021Date of Patent: December 20, 2022Assignee: Cohere Technologies, Inc.Inventors: Vamadevan Namboodiri, Ronny Hadani, James Delfeld
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Publication number: 20220385509Abstract: Co-existence between an Orthogonal Time Frequency Space (OTFS) modulation system and a Long Term Evolution (LTE) system is achieved by generating a number of transmission beams for a first group of user equipment operating using LTE, and a second group of user equipment operating using the OTFS protocol, and transmitting a first group of data packets formatted according to the LTE protocol to the first group of user equipment and a second group of data packets formatted according to the OTFS protocol to the second group of user equipment. The transmissions are performed by precoding and modulating the first group of data packets according to an LTE modulation scheme, and precoding and modulating the second group of data packets according to an OTFS modulation scheme.Type: ApplicationFiled: August 5, 2022Publication date: December 1, 2022Inventors: Christian IBARS CASAS, James DELFELD, Yoav HEBRON, Shachar KONS
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Patent number: 11489559Abstract: Described are devices, systems and methods for scheduling multi-user (MU) multiple input multiple output (MIMO) transmissions in a fixed wireless access (FWA) system. One method for scheduling a large number of user devices in a wireless communication system includes a preselection process to pare down the number of user devices to be simultaneously scheduled, and then scheduling that subset of users. In an example, and assuming each user device communicates over a corresponding wireless channel, the preselection process includes determining a number of sets based on a first characteristic of the wireless channels, where each set includes at least one user device, and then determining a subset of user devices by selecting at most one user device from each of the sets. The scheduling of the selected subset of users is based on a scheduling algorithm and a second characteristic of the wireless channels.Type: GrantFiled: March 8, 2019Date of Patent: November 1, 2022Assignee: Cohere Technologies, Inc.Inventors: Andreas Molisch, Robert Fanfelle, Saurabh Misra, Paul Lind, James Delfeld
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Patent number: 11418300Abstract: Co-existence between an Orthogonal Time Frequency Space (OTFS) modulation system and a Long Term Evolution (LTE) system is achieved by generating a number of transmission beams for a first group of user equipment operating using LTE, and a second group of user equipment operating using the OTFS protocol, and transmitting a first group of data packets formatted according to the LTE protocol to the first group of user equipment and a second group of data packets formatted according to the OTFS protocol to the second group of user equipment. The transmissions are performed by precoding and modulating the first group of data packets according to an LTE modulation scheme, and precoding and modulating the second group of data packets according to an OTFS modulation scheme.Type: GrantFiled: June 12, 2019Date of Patent: August 16, 2022Assignee: Cohere Technologies, Inc.Inventors: Christian Ibars Casas, James Delfeld, Yoav Hebron, Shachar Kons
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Publication number: 20220158780Abstract: Methods, systems and device for achieving synchronization in an orthogonal time frequency space (OTFS) signal receiver are described. An exemplary signal reception technique includes receiving an OTFS modulated wireless signal comprising pilot signal transmissions interspersed with data transmissions, calculating autocorrelation of the wireless signal using the wireless signal and a delayed version of the wireless signal that is delayed by a pre-determined delay, thereby generating an autocorrelation output, processing the autocorrelation filter through a moving average filter to produce a fine timing signal.Type: ApplicationFiled: November 29, 2021Publication date: May 19, 2022Inventors: Vamadevan Namboodiri, Karl Sanders, Yaron Rozenbaum, James Delfeld
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Patent number: 11296919Abstract: Device, methods and systems for precoding in wireless systems using orthogonal time frequency space multiplexing are described. An exemplary method for transmitting wireless signals includes mapping data to generate a quadrature amplitude modulation (QAM) signal in a delay Doppler domain, determining a perturbation signal to minimize expected interference and noise, perturbing the QAM signal with the perturbation signal, thereby producing a perturbed signal, generating a pre-coded signal by pre-coding, using a linear pre-coder, the perturbed signal, and transmitting the pre-coded signal using an orthogonal time frequency space modulation signal scheme.Type: GrantFiled: March 15, 2021Date of Patent: April 5, 2022Assignee: Cohere Technologies, Inc.Inventor: James Delfeld
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Publication number: 20210399926Abstract: Methods, systems and devices for lattice reduction in decision feedback equalizers for orthogonal time frequency space (OTFS) modulation are described. An exemplary wireless communication method, implementable by a wireless communication receiver apparatus, includes receiving a signal comprising information bits modulated using OTFS modulation scheme. Each delay-Doppler bin in the signal is modulated using a quadrature amplitude modulation (QAM) mapping. The method also includes estimating the information bits based on an inverse of a single error covariance matrix of the signal, with the single error covariance matrix being representative of an estimation error for all delay-Doppler bins in the signal.Type: ApplicationFiled: August 23, 2021Publication date: December 23, 2021Inventors: Vamadevan NAMBOODIRI, Ronny HADANI, James DELFELD
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Patent number: 11190308Abstract: Methods, systems and device for achieving synchronization in an orthogonal time frequency space (OTFS) signal receiver are described. An exemplary signal reception technique includes receiving an OTFS modulated wireless signal comprising pilot signal transmissions interspersed with data transmissions, calculating autocorrelation of the wireless signal using the wireless signal and a delayed version of the wireless signal that is delayed by a pre-determined delay, thereby generating an autocorrelation output, processing the autocorrelation filter through a moving average filter to produce a fine timing signal.Type: GrantFiled: September 14, 2018Date of Patent: November 30, 2021Assignee: Cohere Technologies, Inc.Inventors: Vamadevan Namboodiri, Karl Sanders, Yaron Rozenbaum, James Delfeld
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Patent number: 11102034Abstract: Methods, systems and devices for lattice reduction in decision feedback equalizers for orthogonal time frequency space (OTFS) modulation are described. An exemplary wireless communication method, implementable by a wireless communication receiver apparatus, includes receiving a signal comprising information bits modulated using OTFS modulation scheme. Each delay-Doppler bin in the signal is modulated using a quadrature amplitude modulation (QAM) mapping. The method also includes estimating the information bits based on an inverse of a single error covariance matrix of the signal, with the single error covariance matrix being representative of an estimation error for all delay-Doppler bins in the signal.Type: GrantFiled: September 6, 2018Date of Patent: August 24, 2021Assignee: Cohere Technologies, Inc.Inventors: Vamadevan Namboodiri, Ronny Hadani, James Delfeld
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Publication number: 20210250138Abstract: Co-existence between an Orthogonal Time Frequency Space (OTFS) modulation system and a Long Term Evolution (LTE) system is achieved by generating a number of transmission beams for a first group of user equipment operating using LTE, and a second group of user equipment operating using the OTFS protocol, and transmitting a first group of data packets formatted according to the LTE protocol to the first group of user equipment and a second group of data packets formatted according to the OTFS protocol to the second group of user equipment. The transmissions are performed by precoding and modulating the first group of data packets according to an LTE modulation scheme, and precoding and modulating the second group of data packets according to an OTFS modulation scheme.Type: ApplicationFiled: June 12, 2019Publication date: August 12, 2021Inventors: Christian IBARS CASAS, James DELFELD, Yoav HEBRON, Shachar KONS
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Publication number: 20210203539Abstract: Device, methods and systems for precoding in wireless systems using orthogonal time frequency space multiplexing are described. An exemplary method for transmitting wireless signals includes mapping data to generate a quadrature amplitude modulation (QAM) signal in a delay Doppler domain, determining a perturbation signal to minimize expected interference and noise, perturbing the QAM signal with the perturbation signal, thereby producing a perturbed signal, generating a pre-coded signal by pre-coding, using a linear pre-coder, the perturbed signal, and transmitting the pre-coded signal using an orthogonal time frequency space modulation signal scheme.Type: ApplicationFiled: March 15, 2021Publication date: July 1, 2021Inventor: James DELFELD
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Publication number: 20210152282Abstract: Apparatuses, systems, and techniques to correct errors in information received from a plurality of fifth-generation new radio antennas. In at least one embodiment, codeword information is decoded by a plurality of variable (or vector) nodes and check nodes, where codewords and nodes are divided among processors to be performed in parallel.Type: ApplicationFiled: November 15, 2019Publication date: May 20, 2021Inventors: Yanxiang Huang, James Delfeld
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Publication number: 20210105155Abstract: Device, methods and systems for aspects of channel estimation for orthogonal time frequency space (OTFS) modulation in wireless systems are described. In an aspect, a method for wireless communication may include receiving, using multiple receive antennas, from a number of user devices, non-orthogonal pilots wherein at least some transmissions of the non-orthogonal pilots from GT different user devices overlap in at least some time and frequency resources, estimating individual pilots from the number of user devices by computing a pilot separation filter for each antenna, and estimating the wireless channel at time and frequency resources used by the non-orthogonal pilots by filtering the receiving signal at the multiple receiver antennas.Type: ApplicationFiled: February 7, 2019Publication date: April 8, 2021Inventors: Shachar KONS, James DELFELD, Robert FANFELLE, Andreas MOLISCH, Yoav HEBRON
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Patent number: 10965348Abstract: A method of reducing peak to average power ratio of uplink transmission includes, assigning a slice of transmission resource to uplink transmission from a user equipment, where all resource elements in the slice have a same Doppler value, mapping data to the slice, performing orthogonal time frequency space transformation to generate time-frequency domain data and processing the time-frequency domain data for transmission.Type: GrantFiled: September 29, 2017Date of Patent: March 30, 2021Inventors: James Delfeld, Christian Ibars Casas, Yoav Hebron, Ronny Hadani, Shlomo Rakib
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Patent number: 10951454Abstract: Device, methods and systems for recoding in wireless systems using orthogonal time frequency space multiplexing are described. An exemplary method for transmitting wireless signals includes mapping data to generate a quadrature amplitude modulation (QAM) signal in a delay Doppler domain, determining a perturbation signal to minimize expected interference and noise, perturbing the QAM signal with the perturbation signal, thereby producing a perturbed signal, generating a pre-coded signal by pre-coding, using a linear pre-coder, the perturbed signal, and transmitting the pre-coded signal using an orthogonal time frequency space modulation signal scheme.Type: GrantFiled: April 27, 2020Date of Patent: March 16, 2021Assignee: Cohere Technologies, Inc.Inventor: James Delfeld
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Publication number: 20210058114Abstract: Described are devices, systems and methods for scheduling multi-user (MU) multiple input multiple output (MIMO) transmissions in a fixed wireless access (FWA) system. One method for scheduling a large number of user devices in a wireless communication system includes a preselection process to pare down the number of user devices to be simultaneously scheduled, and then scheduling that subset of users. In an example, and assuming each user device communicates over a corresponding wireless channel, the preselection process includes determining a number of sets based on a first characteristic of the wireless channels, where each set includes at least one user device, and then determining a subset of user devices by selecting at most one user device from each of the sets. The scheduling of the selected subset of users is based on a scheduling algorithm and a second characteristic of the wireless channels.Type: ApplicationFiled: March 8, 2019Publication date: February 25, 2021Inventors: Andreas Molisch, Robert Fanfelle, Saurabh Misra, Paul Lind, James Delfeld
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Publication number: 20200403829Abstract: Methods, systems and devices for lattice reduction in decision feedback equalizers for orthogonal time frequency space (OTFS) modulation are described. An exemplary wireless communication method, implementable by a wireless communication receiver apparatus, includes receiving a signal comprising information bits modulated using OTFS modulation scheme. Each delay-Doppler bin in the signal is modulated using a quadrature amplitude modulation (QAM) mapping. The method also includes estimating the information bits based on an inverse of a single error covariance matrix of the signal, with the single error covariance matrix being representative of an estimation error for all delay-Doppler bins in the signal.Type: ApplicationFiled: September 6, 2018Publication date: December 24, 2020Applicant: Cohere Technologies, Inc.Inventors: Devan NAMBOODIRI, Ronny HADANI, James DELFELD