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.

公开(公告)号：US11817987B2

公开(公告)日：2023-11-14

申请号：US16604968

申请日：2018-04-10

Applicant: Cohere Technologies, Inc.

Inventor： Shachar Kons

IPC: H04L27/26 ,  H04L5/00 ,  H04L25/03

CPC classification number: H04L27/2627 ,  H04L5/0023 ,  H04L5/0041 ,  H04L5/0048 ,  H04L25/03006 ,  H04L27/2639 ,  H04L27/2649 ,  H04L27/26134 ,  H04L27/26532

Abstract: Wireless communication transmission and reception techniques are described. At transmitter, source data bits are modulated into a number Nd of constellation symbols. An invertible transform is applied to the constellation symbols, thereby resulting in mapping the transformed symbols into Nd elements in the time-frequency grid. A signal resulting from the invertible transform is transmitted over a communication channel.

公开(公告)号：US11632270B2

公开(公告)日：2023-04-18

申请号：US15733484

申请日：2019-02-07

Applicant: Cohere Technologies, Inc.

Inventor： Shachar Kons ,  James Delfeld ,  Robert Fanfelle ,  Andreas Molisch ,  Yoav Hebron

IPC: H04L27/02 ,  H04L25/02 ,  H04B7/024 ,  H04B7/0417 ,  H04B7/0452 ,  H04W88/02

Abstract: 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.

公开(公告)号：US20190327054A1

公开(公告)日：2019-10-24

申请号：US16460851

申请日：2019-07-02

Applicant: Cohere Technologies, Inc.

Inventor： Shachar Kons ,  Michail Tsatsanis

IPC: H04L5/00 ,  H04L5/02 ,  H04L25/02

Abstract: A wireless communication technique to improve channel estimation using pilot signals includes receiving data symbols for transmission over a wireless communication channel using multiple antenna ports, generating a plurality of scrambling sequences, each corresponding to one of the multiple antenna ports, mapping, for each antenna port, a corresponding pilot signal to time and frequency transmission resources using a corresponding scrambling sequence, multiplexing a first input from the data symbols and a second input from the mapping of the corresponding pilot signal to generate an output signal, and transmitting the output signal over a wireless communication channel.

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

IPC: H04L5/00 ,  H04J4/00 ,  H04W72/12

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.

公开(公告)号：US12231266B2

公开(公告)日：2025-02-18

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

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.

公开(公告)号：US11962373B2

公开(公告)日：2024-04-16

申请号：US17754206

申请日：2020-09-28

Applicant: Cohere Technologies, Inc.

Inventor： Shlomo Selim Rakib ,  Ronny Hadani ,  Shachar Kons

IPC: H04L5/00 ,  H04B7/0408 ,  H04B7/0456 ,  H04L5/14

CPC classification number: H04B7/0456 ,  H04B7/0408 ,  H04L5/0023 ,  H04L5/0062 ,  H04L5/14

Abstract: A wireless communication device includes a feed port comprising multiple input feeds, a precoding subsystem that is electrically connected to the feed port; and an antenna subsystem electrically connected to the precoding subsystem. The antenna subsystem is configured to transmit an output signal of the precoding subsystem to multiple wireless stations using multiple beams. The precoding subsystem is configured to perform a precoding operation on an input signal from the feed port, wherein the precoding operation maximizes a desired signal level to interference ratio of transmissions to the multiple wireless stations.

公开(公告)号：US11632791B2

公开(公告)日：2023-04-18

申请号：US17661539

申请日：2022-04-29

Applicant: Cohere Technologies, Inc.

Inventor： Yoav Hebron ,  Christian Ibars Casas ,  Ronny Hadani ,  Shachar Kons

IPC: H04L5/00 ,  H04W72/53 ,  H04W72/0446 ,  H04W72/0453

Abstract: Methods, systems and devices for providing transmission resources that achieve transmission diversity while reducing pilot signal overhead are described. An exemplary wireless communication method may be implemented in a wireless communication system in which transmission resources are allocated on a per physical resource block (PRB) basis, where a PRB corresponds to a two dimensional resource pattern comprising a first number of subcarriers along a frequency dimension and a second number time slots along a time dimension. The method includes logically dividing subcarriers in each PRB into an integer number of sub-groups of sub-carriers, wherein the integer number is greater than one, allocating, to a transmission, transmission resources corresponding to one or more of the sub-groups of subcarriers, performing the transmission in the wireless communication system.

公开(公告)号：US20220321181A1

公开(公告)日：2022-10-06

申请号：US17596233

申请日：2020-06-05

Applicant: Cohere Technologies, Inc.

Inventor： Ronny Hadani ,  Shachar Kons

IPC: H04B7/0456 ,  H04W52/14 ,  H04B7/024 ,  H04B7/0452

Abstract: Methods, systems and devices for reciprocal geometric precoding are described. One example method includes determining, by a network device, an uplink channel state using reference signal transmissions received from multiple user devices, and generating a precoded transmission waveform for transmission to one or more of the multiple user devices by applying a precoding scheme that is based on the uplink channel state, wherein the uplink channel state completely defines the precoding scheme. In some embodiments, the reference signal transmissions and the precoded transmission waveform are multiplexed using either time-domain multiplexing or frequency-domain multiplexing.

公开(公告)号：US20220263686A1

公开(公告)日：2022-08-18

申请号：US17662590

申请日：2022-05-09

Applicant: Cohere Technologies, Inc.

Inventor： Shachar Kons ,  Ronny Hadani ,  Paul Harris

IPC: H04L25/02 ,  H04B7/0413 ,  H04L5/00

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.