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：US20230354399A1

公开(公告)日：2023-11-02

申请号：US18351014

申请日：2023-07-12

Applicant: Cohere Technologies, Inc.

Inventor： Andreas Molisch ,  Ronny Hadani ,  Robert Fanfelle

IPC: H04W4/00 ,  H04B17/309 ,  H04L25/02 ,  H04L5/00

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

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.

公开(公告)号：US11737129B2

公开(公告)日：2023-08-22

申请号：US17450498

申请日：2021-10-11

Applicant: Cohere Technologies, Inc.

Inventor： Andreas Molisch ,  Ronny Hadani ,  Robert Fanfelle

IPC: H04W72/12 ,  H04W72/542 ,  H04B17/309 ,  H04L5/00 ,  H04L25/02 ,  H04W72/566

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

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：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：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.

公开(公告)号：US11489559B2

公开(公告)日：2022-11-01

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 ,  H04B7/0452 ,  H04B7/06 ,  H04L5/00 ,  H04W72/12

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：US20220141841A1

公开(公告)日：2022-05-05

申请号：US17450498

申请日：2021-10-11

Applicant: Cohere Technologies, Inc.

Inventor： Andreas Molisch ,  Ronny Hadani ,  Robert Fanfelle

IPC: H04W72/12 ,  H04B17/309 ,  H04L5/00 ,  H04L25/02

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.

公开(公告)号：US11147087B2

公开(公告)日：2021-10-12

申请号：US16606164

申请日：2018-04-23

Applicant: Cohere Technologies, Inc.

Inventor： Andreas Molisch ,  Ronny Hadani ,  Robert Fanfelle

IPC: H04W72/12 ,  H04B17/309 ,  H04L5/00 ,  H04L25/02

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.