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.

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：US20240348389A1

公开(公告)日：2024-10-17

申请号：US18628558

申请日：2024-04-05

Applicant: Cohere Technologies, Inc.

Inventor： Yoav Hebron ,  Shlomo Selim Rakib ,  Ronny Hadani ,  Michail Tsatsanis ,  Clayton Ambrose ,  Jim Delfeld ,  Robert Fanfelle

IPC: H04L5/00 ,  H04B7/005 ,  H04B17/309 ,  H04B17/373 ,  H04L25/02 ,  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.

公开(公告)号：US11546068B2

公开(公告)日：2023-01-03

申请号：US16638254

申请日：2018-08-07

Applicant: Cohere Technologies, Inc.

Inventor： Andreas Molisch ,  Robert Fanfelle

IPC: H04B17/391 ,  H04B3/46 ,  H04B10/07 ,  H04B17/00 ,  H04B17/30

Abstract: The computer-implemented method includes simulating, by a processor, using an electromagnetic solver including ray launching or ray tracing, multiple rays that reach a vicinity of a receiver of a wireless channel, determining locations of interactions of the rays with an environment of the wireless channel, post-processing, using one or more of the multiple rays, information about received signal at the receiver to obtain temporal variations therein, and determining a characteristic of the wireless channel using results of the post-processing.

公开(公告)号：US20210399852A1

公开(公告)日：2021-12-23

申请号：US17303436

申请日：2021-05-28

Applicant: Cohere Technologies, Inc.

Inventor： Shlomo Selim Rakib ,  Ronny Hadani ,  Richard Benner ,  Robert Fanfelle

IPC: H04L5/00 ,  H01Q21/24 ,  H04B7/06 ,  H04B7/12

Abstract: A fixed wireless access system is implemented using orthogonal time frequency space multiplexing (OTFS). Data transmissions to/from different devices share transmission resources using—delay Doppler multiplexing, time-frequency multiplexing, multiplexing at stream and/or layer level, and angular multiplexing. Time-frequency multiplexing is achieved by dividing the time-frequency plan into subgrids, with the subsampled time frequency grid being used to carry the OTFS data. Antenna implementations include a hemispherical antenna with multiple antenna elements arranged in an array to achieve multiplexing.

公开(公告)号：US11558157B2

公开(公告)日：2023-01-17

申请号：US17303436

申请日：2021-05-28

Applicant: Cohere Technologies, Inc.

Inventor： Shlomo Selim Rakib ,  Ronny Hadani ,  Richard Benner ,  Robert Fanfelle

IPC: H04L5/00 ,  H01Q21/24 ,  H04B7/06 ,  H04B7/12

Abstract: A fixed wireless access system is implemented using orthogonal time frequency space multiplexing (OTFS). Data transmissions to/from different devices share transmission resources using—delay Doppler multiplexing, time-frequency multiplexing, multiplexing at stream and/or layer level, and angular multiplexing. Time-frequency multiplexing is achieved by dividing the time-frequency plan into subgrids, with the subsampled time frequency grid being used to carry the OTFS data. Antenna implementations include a hemispherical antenna with multiple antenna elements arranged in an array to achieve multiplexing.

公开(公告)号：US20210058114A1

公开(公告)日：2021-02-25

申请号：US16979020

申请日：2019-03-08

Applicant: Cohere Technologies, Inc.

Inventor： Andreas Molisch ,  Robert Fanfelle ,  Saurabh Misra ,  Paul Lind ,  James Delfeld

IPC: H04B7/026 ,  H04W72/12 ,  H04L5/00 ,  H04B7/0452 ,  H04B7/06

Abstract: 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.

公开(公告)号：US10356632B2

公开(公告)日：2019-07-16

申请号：US15881752

申请日：2018-01-27

Applicant: Cohere Technologies, Inc.

Inventor： Robert Fanfelle

IPC: H04W16/28 ,  H01Q5/50 ,  H01Q1/24 ,  H04W72/04 ,  H01Q21/24 ,  H01Q15/02 ,  H01Q3/24 ,  H01Q19/06 ,  H01Q21/00 ,  H01Q25/00 ,  H01Q5/45 ,  H04B7/06 ,  H01Q15/08 ,  H01Q21/06 ,  H04B7/00

Abstract: An antenna system includes an antenna lens, and one or more antenna feeds placed at an on or off-focal point of the antenna lens. Each of the one or more antenna feeds comprises one or more antenna feed elements that are electrically independently operable. The antenna system also includes an antenna feed network electrically coupled with the one or more antenna feed elements via signal paths.

公开(公告)号：US20180302802A1

公开(公告)日：2018-10-18

申请号：US15881752

申请日：2018-01-27

Applicant: Cohere Technologies, Inc.

Inventor： Robert Fanfelle

IPC: H04W16/28 ,  H01Q5/50 ,  H01Q15/02 ,  H04W72/04 ,  H01Q21/24 ,  H01Q1/24

CPC classification number: H04W16/28 ,  H01Q1/246 ,  H01Q3/245 ,  H01Q5/45 ,  H01Q5/50 ,  H01Q15/02 ,  H01Q15/08 ,  H01Q19/062 ,  H01Q21/0006 ,  H01Q21/06 ,  H01Q21/24 ,  H01Q25/007 ,  H04B7/00 ,  H04B7/0617 ,  H04W72/0453

Abstract: An antenna system includes an antenna lens, and one or more antenna feeds placed at an on or off-focal point of the antenna lens. Each of the one or more antenna feeds comprises one or more antenna feed elements that are electrically independently operable. The antenna system also includes an antenna feed network electrically coupled with the one or more antenna feed elements via signal paths.

公开(公告)号：US11991738B2

公开(公告)日：2024-05-21

申请号：US18351014

申请日：2023-07-12

Applicant: Cohere Technologies, Inc.

Inventor： Andreas Molisch ,  Ronny Hadani ,  Robert Fanfelle

IPC: H04W72/542 ,  H04B17/309 ,  H04L5/00 ,  H04L25/02 ,  H04W72/566

CPC classification number: H04W72/542 ,  H04B17/309 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0226 ,  H04L25/025 ,  H04W72/566

Abstract: Methods, devices, and systems for communication techniques that use the quasi-static properties of wireless channels are described. One example method to improve communication performance includes receiving a set of pilots over a transmission channel between the wireless communication apparatus and a far-end communication apparatus, the transmission channel comprising a first portion that is time-invariant and a second portion that is time-variant, processing the received set of pilots to generate an estimate of the first portion, processing the received set of pilots to generate an estimate of the second portion, and performing a communication based on a channel state information that is a weighted combination of a first term based on the estimate of the first portion and a second term based on the estimate of the second portion.