Patents Assigned to COHERE TECHNOLOGIES, INC.
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Patent number: 10098092Abstract: A wireless telecommunications system that mitigates infrasymbol interference due to Doppler-shift and multipath and enables multiple access in one radio channel. Embodiments of the present invention are particularly advantageous for wireless telecommunications systems that operate in high-mobility environments, including high-speed trains and airplanes.Type: GrantFiled: January 19, 2017Date of Patent: October 9, 2018Assignee: Cohere Technologies, Inc.Inventors: Shlomo Rakib, Ron Hadani
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Publication number: 20180288809Abstract: Methods, devices and systems for generating physical random access channel sequences that can be used to efficiently access a wireless network are disclosed. One exemplary method of accessing a wireless network includes generating a repeated orthogonal sequence by repeating a base orthogonal sequence, generating a random access sequence by applying a window function to the repeated orthogonal sequence, and accessing the wireless network using a random access procedure by selectively using the random access sequence. In an example, the base orthogonal sequence may be a Zadoff-Chu sequence. In another example, the window function may be a root-Hamming window.Type: ApplicationFiled: March 27, 2018Publication date: October 4, 2018Applicant: Cohere Technologies, Inc.Inventors: James Delfeld, Ronny Hadani, Konstantinos Dimou
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Patent number: 10064074Abstract: Computerized wireless transmitter/receiver system that automatically uses combinations of various methods, including transmitting data symbols by weighing or modulating a family of time shifted and frequency shifted waveforms bursts, pilot symbol methods, error detection methods, MIMO methods, and other methods, to automatically determine the structure of a data channel, and automatically compensate for signal distortions caused by various structural aspects of the data channel, as well as changes in channel structure. Often the data channel is a two or three dimensional space in which various wireless transmitters, receivers and signal reflectors are moving. The invention's modulation methods detect locations and speeds of various reflectors and other channel impairments. Error detection schemes, variation of modulation methods, and MIMO techniques further detect and compensate for impairments.Type: GrantFiled: April 11, 2017Date of Patent: August 28, 2018Assignee: Cohere Technologies, Inc.Inventors: Shlomo Selim Rakib, Ronny Hadani
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Publication number: 20180227159Abstract: A system and method for orthogonal time frequency space communication and waveform generation. The method includes receiving a plurality of information symbols and encoding an N×M array containing the plurality of information symbols into a two-dimensional array of modulation symbols by spreading each of the plurality of information symbols with respect to both time and frequency. The two-dimensional array of modulation symbols is then transmitted using M mutually orthogonal waveforms included within M frequency sub-bands.Type: ApplicationFiled: June 27, 2016Publication date: August 9, 2018Applicant: Cohere Technologies, Inc.Inventors: Shlomo Selim RAKIB, Ronny HADANI
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Patent number: 10034184Abstract: Fiber, cable, and wireless data channels are typically impaired by reflectors and other imperfections, producing a channel state with echoes and frequency shifts in data waveforms. Here, methods of using OTFS pilot symbol waveform bursts to automatically produce a detailed 2D model of the channel state are presented. This 2D channel state can then be used to optimize data transmission. For wireless data channels, an even more detailed 2D model of channel state can be produced by using polarization and multiple antennas in the process. Once 2D channel states are known, the system turns imperfect data channels from a liability to an advantage by using channel imperfections to boost data transmission rates. The methods can be used to improve legacy data transmission modes in multiple types of media, and are particularly useful for producing new types of robust and high capacity wireless communications using non-legacy OTFS data transmission methods.Type: GrantFiled: May 24, 2017Date of Patent: July 24, 2018Assignee: Cohere Technologies, Inc.Inventors: Ronny Hadani, Shlomo Selim Rakib
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Patent number: 9819519Abstract: A wireless telecommunications system that mitigates infra-symbol interference due to Doppler-shift and multipath. Embodiments of the present invention are particularly advantageous for wireless telecommunications systems that operate in high-mobility environments, including high-speed trains and airplanes.Type: GrantFiled: January 19, 2017Date of Patent: November 14, 2017Assignee: Cohere Technologies, Inc.Inventors: Shlomo Rakib, Ron Hadani
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Publication number: 20170289961Abstract: A wireless telecommunications system that mitigates infrasymbol interference due to Doppler-shift and multipath and enables multiple access in one radio channel. Embodiments of the present invention are particularly advantageous for wireless telecommunications systems that operate in high-mobility environments, including high-speed trains and airplanes.Type: ApplicationFiled: January 19, 2017Publication date: October 5, 2017Applicant: Cohere Technologies, Inc.Inventors: Shlomo Rakib, Ron Hadani
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Publication number: 20170288913Abstract: A wireless telecommunications system that mitigates infra-symbol interference due to Doppler-shift and multipath. Embodiments of the present invention are particularly advantageous for wireless telecommunications systems that operate in high-mobility environments, including high-speed trains and airplanes.Type: ApplicationFiled: January 19, 2017Publication date: October 5, 2017Applicant: Cohere Technologies, Inc.Inventors: Shlomo Rakib, Ron Hadani
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Patent number: 9722741Abstract: A wireless telecommunications system that mitigates infrasymbol interference due to Doppler-shift and multipath and enables multiple access in one radio channel. Embodiments of the present invention are particularly advantageous for wireless telecommunications systems that operate in high-mobility environments, including high-speed trains and airplanes.Type: GrantFiled: July 20, 2016Date of Patent: August 1, 2017Assignee: Cohere Technologies, Inc.Inventors: Shlomo Rakib, Ron Hadani
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Patent number: 9668148Abstract: Fiber, cable, and wireless data channels are typically impaired by reflectors and other imperfections, producing a channel state with echoes and frequency shifts in data waveforms. Here, methods of using OTFS pilot symbol waveform bursts to automatically produce a detailed 2D model of the channel state are presented. This 2D channel state can then be used to optimize data transmission. For wireless data channels, an even more detailed 2D model of channel state can be produced by using polarization and multiple antennas in the process. Once 2D channel states are known, the system turns imperfect data channels from a liability to an advantage by using channel imperfections to boost data transmission rates. The methods can be used to improve legacy data transmission modes in multiple types of media, and are particularly useful for producing new types of robust and high capacity wireless communications using non-legacy OTFS data transmission methods.Type: GrantFiled: July 21, 2015Date of Patent: May 30, 2017Assignee: Cohere Technologies, Inc.Inventors: Ronny Hadani, Shlomo Selim Rakib
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Patent number: 9634719Abstract: Computerized wireless transmitter/receiver system that automatically uses combinations of various methods, including transmitting data symbols by weighing or modulating a family of time shifted and frequency shifted waveforms bursts, pilot symbol methods, error detection methods, MIMO methods, and other methods, to automatically determine the structure of a data channel, and automatically compensate for signal distortions caused by various structural aspects of the data channel, as well as changes in channel structure. Often the data channel is a two or three dimensional space in which various wireless transmitters, receivers and signal reflectors are moving. The invention's modulation methods detect locations and speeds of various reflectors and other channel impairments. Error detection schemes, variation of modulation methods, and MIMO techniques further detect and compensate for impairments.Type: GrantFiled: July 21, 2015Date of Patent: April 25, 2017Assignee: Cohere Technologies, Inc.Inventors: Shlomo Selim Rakib, Ronny Hadani
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Patent number: 9444514Abstract: Fiber, cable, and wireless data channels are typically impaired by reflectors and other imperfections, producing a channel state with echoes and frequency shifts in data waveforms. Here, methods of using OTFS pilot symbol waveform bursts to automatically produce a detailed 2D model of the channel state are presented. This 2D channel state can then be used to optimize data transmission. For wireless data channels, an even more detailed 2D model of channel state can be produced by using polarization and multiple antennas in the process. Once 2D channel states are known, the system turns imperfect data channels from a liability to an advantage by using channel imperfections to boost data transmission rates. The methods can be used to improve legacy data transmission modes in multiple types of media, and are particularly useful for producing new types of robust and high capacity wireless communications using non-legacy OTFS data transmission methods.Type: GrantFiled: December 29, 2014Date of Patent: September 13, 2016Assignee: Cohere Technologies, Inc.Inventors: Ronny Hadani, Shlomo Selim Rakib
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Patent number: 9294315Abstract: A method of data transmission including arranging a set of data elements into an original data frame having a first dimension of N elements and a second dimension of N elements, where N is greater than one. The method includes transforming the original data frame in accordance with a transformation matrix to form a first transformed data matrix having at least N2 transformed data elements wherein each of the transformed data elements is based upon a plurality of the data elements of the original data frame and wherein a first dimension of the first transformed data matrix corresponds to a frequency shift axis and a second dimension corresponds to a time shift axis. A permuted data matrix is formed by permuting at least a portion of the elements of the first transformed data matrix so as to shift the at least a portion of the elements with respect to the time shift axis.Type: GrantFiled: June 25, 2013Date of Patent: March 22, 2016Assignee: Cohere Technologies, Inc.Inventors: Ronny Hadani, Selim Shlomo Rakib
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Patent number: 9130638Abstract: A method of receiving data including receiving, on one or more carrier waveforms, signals representing a plurality of data elements of an original data frame wherein each of the data elements are represented by cyclically time shifted and cyclically frequency shifted versions of a known set of waveforms. The method further includes generating, based upon the signals, a received data frame and generating an equalized data frame by performing an equalization operation using elements of the received data frame, the equalization operation correcting for distortion introduced into the signals during propagation of the carrier waveforms through a channel.Type: GrantFiled: June 25, 2013Date of Patent: September 8, 2015Assignee: Cohere Technologies, Inc.Inventors: Ronny Hadani, Salim Shlomo Rakib
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Patent number: 9083483Abstract: A wireless combination time, frequency and spectral shaping communications method that transmits data in convolution unit matrices (data frames) of N×N (N2), where generally either all N2 data symbols are received over N spreading time intervals (each composed of N time slices), or none are. To transmit, the N2 sized data frame matrix is multiplied by a first N×N time-frequency shifting matrix, permuted, and then multiplied by a second N×N spectral shaping matrix, thereby mixing each data symbol across the entire resulting N×N matrix (TFSSS data matrix). Columns from this N2 TFSSS data matrix are selected, modulated, and transmitted, on a one element per time slice basis. At the receiver, the replica TFSSS matrix is reconstructed and deconvoluted, revealing the data. The method can accommodate multiple users at once, can adapt to changing channel conditions, and is particularly useful for coping with channel impairments such as Doppler shifts.Type: GrantFiled: July 27, 2014Date of Patent: July 14, 2015Assignee: Cohere Technologies, Inc.Inventors: Shlomo Selim Rakib, Ronny Hadani
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Patent number: 9083595Abstract: A method of modulating communications signals, such as optical fiber, wired electronic, or wireless signals in a manner that facilitates automatic correction for the signal distortion effects of echoes and frequency shifts, while still allowing high rates of data transmission. Data symbols intended for transmission are distributed into N×N matrices, and used to weigh or modulate a family of cyclically time shifted and cyclically frequency shifted waveforms. Although these waveforms may then be distorted during transmission, their basic cyclic time and frequency repeating structure facilitates use of improved receivers with deconvolution devices that can utilize the repeating patterns to correct for these distortions. The various waveforms may be sent in N time blocks at various time spacing and frequency spacing combinations in a manner that can allow interleaving of blocks from different transmitters. Applications to channel sounding/characterization, system optimization, and also radar are also discussed.Type: GrantFiled: March 27, 2012Date of Patent: July 14, 2015Assignee: Cohere Technologies, Inc.Inventors: Shlomo Selim Rakib, Ronny Hadani
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Patent number: 9071286Abstract: A method for modulating data for transmission within a communication system. The method includes establishing a time-frequency shifting matrix of dimension N×N, wherein N is greater than one. The method further includes combining the time-frequency shifting matrix with a data frame to provide an intermediate data frame. A transformed data matrix is provided by permuting elements of the intermediate data frame. A modulated signal is generated in accordance with elements of the transformed data matrix.Type: GrantFiled: June 25, 2013Date of Patent: June 30, 2015Assignee: Cohere Technologies, Inc.Inventors: Ronny Hadani, Salim Shlomo Rakib
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Patent number: 9071285Abstract: A system and method of providing a modulated signal useable in a signal transmission system. The method includes transforming, perhaps with respect to both time and frequency, a data frame including a plurality of data elements into a transformed data matrix. The transformed data matrix includes a plurality of transformed data elements where each of the plurality of transformed data elements is based upon each of the plurality of data elements. The method further includes generating the modulated signal in accordance with the transformed data elements of the transformed data matrix.Type: GrantFiled: June 25, 2013Date of Patent: June 30, 2015Assignee: Cohere Technologies, Inc.Inventors: Ronny Hadani, Salim Shlomo Rakib
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Patent number: 9031141Abstract: A method for modulating data for transmission within a communication system. The method includes establishing a time-frequency shifting matrix of dimension N×N, wherein N is greater than one. The method further includes combining the time-frequency shifting matrix with a data frame to provide an intermediate data frame. A transformed data matrix is provided by permuting elements of the intermediate data frame. A modulated signal is generated in accordance with elements of the transformed data matrix.Type: GrantFiled: June 25, 2013Date of Patent: May 12, 2015Assignee: Cohere Technologies, Inc.Inventors: Ronny Hadani, Salim Shlomo Rakib
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Patent number: 8976851Abstract: A method which includes receiving a first modulated signal from a first user device, the first modulated signal being generated based upon a time-frequency transformation of first user data. The method further includes receiving a second modulated signal from a second user device, the second modulated signal being generated based upon a time-frequency transformation of second user data. The first modulated signal and the second modulated signal are then processed.Type: GrantFiled: June 25, 2013Date of Patent: March 10, 2015Assignee: Cohere Technologies, Inc.Inventors: Ronny Hadani, Salim Shlomo Rakib