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公开(公告)号：US12132597B2
公开(公告)日：2024-10-29
申请号：US18686659
申请日：2022-08-26
Applicant: Cohere Technologies, Inc.
Inventor： Shachar Kons , Shlomo Selim Rakib , Ronny Hadani
IPC: H04L27/26
CPC classification number: H04L27/2639 , H04L27/261
Abstract: Methods, systems and devices for wireless communication are described. One example method includes performing a first mapping in which information bits are mapped to transmission resources in a first portion of a two-dimensional delay-Doppler grid. Herein, the two-dimensional delay-Doppler grid comprises N Doppler elements and M delay elements, where N and M are positive integers. The method further includes performing a second mapping in which a reference signal is mapped to transmission resources in a second portion of the two-dimensional delay-Doppler grid, and generating a transmission waveform from a signal combination of an output of the first mapping and an output of the second mapping. The transmission waveform corresponds to an output of an orthogonal time frequency space (OTFS) waveform of the signal combination, and at least the output of the second mapping undergoes a time domain spreading.
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公开(公告)号：US12101145B2
公开(公告)日：2024-09-24
申请号：US18006470
申请日：2021-08-02
Applicant: Cohere Technologies, Inc.
Inventor： Ronny Hadani , Shlomo Selim Rakib
IPC: H04B7/0456 , H04B7/06
CPC classification number: H04B7/0486 , H04B7/063 , H04B7/0632
Abstract: Methods, systems and devices for wireless communication, which include localization and auto-calibration, are described. One example method includes receiving, at a wireless device, signal transmissions from one or more network devices, and generating, by processing the signal transmissions, a feedback signal for antenna calibration of the one or more network devices. In some embodiments, the antenna calibration is used for performing device localization and feature map generation that is subsequently used for scheduling transmissions in a wireless network.
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3.发明公开公开(公告)号：US20240292276A1
公开(公告)日：2024-08-29
申请号：US18648935
申请日：2024-04-29
Applicant: Cohere Technologies, Inc.
Inventor： Shachar KONS , Shlomo Selim Rakib , Ronny Hadani
IPC: H04W28/16 , H04W16/24 , H04W72/044 , H04W72/542
CPC classification number: H04W28/16 , H04W16/24 , H04W72/044 , H04W72/542
Abstract: Methods, systems and devices for distributed cooperative operation of wireless cells based on sparse channel representations are described. One example method includes providing, using a server, seamless wireless connectivity in an area in which a plurality of network nodes are organized as clusters, where each network node is configured to provide wireless connectivity via N angular sectors covering a surrounding area, where N is an integer and wherein angular sectors of the plurality of network nodes collectively cover the area; controlling, by the server, network nodes in a cluster to collect channel condition information for the N angular sectors and communicate the channel condition information to the network-side server, and operating the server to use the channel condition information collected from the network nodes in the cluster to control communication for the network nodes in the cluster at a different time or a different frequency or a different spatial direction.
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公开(公告)号：US20240187298A1
公开(公告)日：2024-06-06
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
CPC classification number: 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：US11968144B2
公开(公告)日：2024-04-23
申请号：US17805569
申请日：2022-06-06
Applicant: Cohere Technologies, Inc.
Inventor： Yoav Hebron , Shlomo Selim Rakib , Ronny Hadani , Michail Tsatsanis , Clayton Ambrose , Jim Delfeld , Robert Fanfelle
IPC: H04L25/02 , H04B7/005 , H04B17/309 , H04B17/373 , H04L5/00 , H04L27/01 , H04L27/26
CPC classification number: H04L5/0048 , H04B7/005 , H04B17/309 , H04B17/373 , H04L5/0007 , H04L5/0044 , H04L25/0202 , H04L25/0204 , H04L25/0226 , H04L25/0232 , H04L27/01 , H04L27/2639 , H04L27/2647
Abstract: Techniques for performing channel estimation in an orthogonal time, frequency and space (OTFS) communication system include receiving a wireless signal comprising a data signal portion and a pilot signal portion in which the pilot signal portion includes multiple pilot signals multiplexed together in the OTFS domain, performing two-dimensional channel estimation in a time-frequency domain based on a minimum mean square error (MMSE) optimization criterion, and recovering information bits using a channel estimate obtained from the two-dimensional channel estimation.
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Patent Agency Ranking
公开(公告)号：US10568143B2
公开(公告)日：2020-02-18
申请号：US15937701
申请日：2018-03-27
Applicant: Cohere Technologies, Inc.
Inventor： James Delfeld , Ronny Hadani , Konstantinos Dimou
Abstract: 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.
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公开(公告)号：US20190173630A1
公开(公告)日：2019-06-06
申请号：US16273482
申请日：2019-02-12
Applicant: Cohere Technologies, Inc.
Inventor： Shachar Kons , Ronny Hadani , Yoav Hebron
Abstract: A method for performing downlink transmissions from a transmitting device to multiple user devices using transmission resources from a multi-dimensional grid of resources is described. The method includes logically partitioning the transmission resources into multiple segments, assigning, to a given user device of the multiple user devices, transmission resources of one or more of the multiple segments, and performing, using at least some of the assigned transmission resources for the given user device, a downlink transmission using an orthogonal time frequency space (OTFS) transformation on data or signals to be transmitted to the given user device.
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公开(公告)号：US20190081836A1
公开(公告)日：2019-03-14
申请号：US16084791
申请日：2017-03-23
Applicant: COHERE TECHNOLOGIES
Inventor： Ronny Hadani , Shlomo Selim Rakib , Anthony Ekpenyong , Clayton Ambrose , Shachar Kons
Abstract: Wireless communication techniques for transmitting and receiving reference signals is described. The reference signals may include pilot signals that are transmitted using transmission resources that are separate from data transmission resources. Pilot signals are continuously transmitted from a base station to user equipment being served. Pilot signals are generated from delay-Doppler domain signals that are processed to obtain time-frequency signals that occupy a two-dimensional lattice in the time frequency domain that is non-overlapping with a lattice corresponding to data signal transmissions.
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公开(公告)号：US20180242170A1
公开(公告)日：2018-08-23
申请号：US15862499
申请日：2018-01-04
Applicant: Cohere Technologies
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.
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公开(公告)号：US10034184B2
公开(公告)日：2018-07-24
申请号：US15604072
申请日：2017-05-24
Applicant: Cohere Technologies, Inc.
Inventor： Ronny Hadani , Shlomo Selim Rakib
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.
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