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公开(公告)号：US10090973B2
公开(公告)日：2018-10-02
申请号：US15269793
申请日：2016-09-19
Applicant: COHERE TECHNOLOGIES, INC.
Inventor： Ronny Hadani , Shlomo Selim Rakib
Abstract: A method and apparatus for wireless communication compatible with a Long Term Evolution (LTE) communication system. The method includes transforming input data in accordance with a two-dimensional Orthogonal Time Frequency Space (OTFS) transform in order to generate OTFS transformed data. The method includes generating a data frame that contains the transformed data and is structured for use within the LTE communication system. The method further includes transmitting the data frame using an Orthogonal Frequency Division Multiplexing (OFDM) transmitter.
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公开(公告)号：US09929783B2
公开(公告)日：2018-03-27
申请号：US15152464
申请日：2016-05-11
Applicant: Cohere Technologies, Inc.
Inventor： Shlomo Selim Rakib , Ronny Hadani
CPC classification number: H04B7/0413 , H04B7/0617 , H04L5/0005 , H04L5/0016 , H04L23/02 , H04L25/03834 , H04L27/2639 , H04L27/2655 , H04L27/2697
Abstract: A system and method for orthogonal time frequency space communication and waveform generation. The method includes receiving a plurality of information symbols and creating a plurality of modulation symbols by using each of the plurality information symbols to modulate one of a plurality of two-dimensional basis functions on a time-frequency plane Each of the plurality of two-dimensional basis functions is uniquely associated with one of the plurality of information symbols. The method further includes generating a transmit waveform comprised of a plurality of pulse waveforms. Each of the plurality of pulse waveforms corresponds to a combination of one of the plurality of modulation symbols and one of a plurality of time-translated and frequency-modulated versions of a fundamental transmit pulse.
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公开(公告)号：US20170149594A1
公开(公告)日：2017-05-25
申请号：US15188946
申请日：2016-06-21
Applicant: Cohere Technologies, Inc.
Inventor： Selim Shlomo Rakib , Ronny Hadani
CPC classification number: H04L27/2627 , H04B7/0413 , H04B7/0617 , H04L5/0007 , H04L5/0016 , H04L23/02 , H04L25/03834 , H04L27/2639 , H04L27/2655 , H04L27/2697
Abstract: 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.
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公开(公告)号：US09634719B2
公开(公告)日：2017-04-25
申请号：US14805400
申请日：2015-07-21
Applicant: Cohere Technologies, Inc.
Inventor： Shlomo Selim Rakib , Ronny Hadani
CPC classification number: H04B1/692 , H04B7/0626 , H04B7/10 , H04L5/0007 , H04L5/0048 , H04L25/0212 , H04L25/0226 , H04L27/366 , H04W24/02
Abstract: 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. The invention can automatically optimize its operational parameters, and produce a deterministic non-fading signal in environments in which other methods would likely degrade.
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公开(公告)号：US20170099607A1
公开(公告)日：2017-04-06
申请号：US15260234
申请日：2016-09-08
Applicant: COHERE TECHNOLOGIES, INC.
Inventor： Ronny Hadani , Shlomo Selim Rakib
CPC classification number: H04W24/02 , H04L5/0007 , H04L5/0016 , H04L27/2601 , H04L27/2636 , H04L27/2639 , H04L27/2697
Abstract: A method and system for multiple access in a system utilizing two-dimensional signal modulation. The method includes spreading data symbols arranged in a two-dimensional information domain onto sets of grid points respectively associated with different users in a time-frequency domain. The spreading is performed using two-dimensional basis functions uniquely associated with positions on a lattice in the information domain corresponding to the data symbols. A modulated signal is then generated using the sets of transformed symbols. The sets of grid points associated with the different users may be interleaved within the time-frequency domain or may form non-interleaved windows.
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Patent Agency Ranking
公开(公告)号：US09444514B2
公开(公告)日：2016-09-13
申请号：US14583911
申请日：2014-12-29
Applicant: Cohere Technologies, Inc.
Inventor： Ronny Hadani , Shlomo Selim Rakib
CPC classification number: H04B1/692 , H04B7/0626 , H04B7/10 , H04L5/0007 , H04L5/0048 , H04L25/0212 , H04L25/0226 , H04L27/366 , H04W24/02
Abstract: 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.
Abstract translation: 光纤，电缆和无线数据通道通常受到反射器和其他缺陷的损害，产生具有回波的通道状态和数据波形中的频率偏移。 这里，给出了使用OTFS导频符号波形突发自动产生信道状态的详细2D模型的方法。 然后可以使用该2D通道状态来优化数据传输。 对于无线数据信道，可以通过在该过程中使用极化和多个天线来产生更加详细的信道状态的2D模型。 一旦二维渠道状态已知，系统通过使用渠道缺陷来提高数据传输速率，将不完美的数据通道从责任转移到优势。 这些方法可以用于改进多种类型媒体中的传统数据传输模式，并且对于使用非传统OTFS数据传输方法产生新类型的鲁棒和大容量无线通信特别有用。
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公开(公告)号：US12184468B2
公开(公告)日：2024-12-31
申请号：US18409482
申请日：2024-01-10
Applicant: Cohere Technologies, Inc.
Inventor： Ronny Hadani , Shlomo Selim Rakib , Anton Monk , Michail Tsatsanis , Yoav Hebron
IPC: H04L27/32
Abstract: Orthogonal Time Frequency Space (OTFS) is a novel modulation scheme with significant benefits for 5G systems. The fundamental theory behind OTFS is presented in this paper as well as its benefits. We start with a mathematical description of the doubly fading delay-Doppler channel and develop a modulation that is tailored to this channel. We model the time varying delay-Doppler channel in the time-frequency domain and derive a new domain (the OTFS domain) where we show that the channel is transformed to a time invariant one and all symbols see the same SNR. We explore aspects of the modulation like delay and Doppler resolution, and address design and implementation issues like multiplexing multiple users and evaluating complexity. Finally we present some performance results where we demonstrate the superiority of OTFS.
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公开(公告)号：US12119903B2
公开(公告)日：2024-10-15
申请号：US18456730
申请日：2023-08-28
Applicant: Cohere Technologies, Inc.
Inventor： Ronny Hadani , Shachar Kons
IPC: H04B7/0456 , H04B7/024 , H04B7/0452 , H04W52/14
CPC classification number: H04B7/0456 , H04B7/024 , H04B7/0452 , H04W52/143
Abstract: A wireless communication method includes determining, by a network device, uplink power allocations assigned to each user device of multiple user devices; estimating a channel response for each user device of multiple user devices based on a corresponding uplink reference signal transmission received from the each user device; computing, for the each user device, a covariance matrix based on a corresponding channel response, determining a maximum eigenvector of an uplink signal to interference and noise ratio (SINR) matrix for the each user device; computing, from the uplink SINR matrix, a downlink cross-interference matrix for the each user device; selecting, from the downlink cross-interference matrix for the each user device, a selected vector that maximizes a selected criterion for the each user device; and determining, from the selected vectors of the multiple user devices, a downlink power allocation for the each user device of multiple user devices.
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公开(公告)号：US12068846B2
公开(公告)日：2024-08-20
申请号：US17443004
申请日：2021-07-19
Applicant: Cohere Technologies, Inc.
Inventor： Ronny Hadani , Anton Monk , Shlomo Selim Rakib , Michail Tsatsanis
CPC classification number: H04L1/0023 , H04L5/0007 , H04L5/0023 , H04L27/2639 , H04L27/2697 , H04B7/06 , H04L1/0071 , H04L25/03834
Abstract: An Orthogonal Time Frequency Space Modulation (OTFS) modulation scheme achieving multiple access by multiplexing multiple signals at the transmitter-side performs allocation of transmission resources to a first signal and a second signal, combining and converting to a transmission format via OTFS modulation and transmitting the signal over a communication channel. At the receiver, multiplexed signals are recovered using orthogonality property of the basis functions used for the multiplexing at the transmitter.
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公开(公告)号：US20240250851A1
公开(公告)日：2024-07-25
申请号：US18624914
申请日：2024-04-02
Applicant: Cohere Technologies, Inc.
Inventor： Shachar Kons , Ronny Hadani , Paul Harris
IPC: H04L25/02 , H04B7/0413 , H04L5/00
CPC classification number: H04L25/0204 , H04B7/0413 , H04L5/0048 , H04L25/0224 , H04L25/0248
Abstract: A wireless communication method includes receiving, by a first wireless device during a training phase, reference tones using a first number of resource elements from a transmitter of a second wireless device, wherein the first wireless device comprises multiple receiving antennas, estimating, by the first wireless device, from the receiving the reference tones, a second order statistics of wireless channels between the multiple receiving antennas and the transmitter of the second wireless device, and performing channel estimation, during an operational phase subsequent to the training phase, using the second order statistics and reference tones received on a second number of resource elements, wherein the second number is less than the first number.
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