公开(公告)号：US20230164013A1

公开(公告)日：2023-05-25

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: H04L27/26134 ,  H04L27/2627 ,  H04L27/2639 ,  H04L5/0023 ,  H04L25/03006 ,  H04L5/0041

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：US11362872B2

公开(公告)日：2022-06-14

申请号：US16946375

申请日：2020-06-18

Applicant: Cohere Technologies, Inc.

Inventor： Ronny Hadani ,  Shlomo Selim Rakib ,  Anthony Ekpenyong ,  Clayton Ambrose ,  Shachar Kons

IPC: H04L27/26 ,  H04L5/00 ,  H04L1/00 ,  H04B7/0413

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.

公开(公告)号：US20220086694A1

公开(公告)日：2022-03-17

申请号：US17309950

申请日：2019-12-31

Applicant: Cohere Technologies, Inc.

Inventor： Shachar Kons ,  Shlomo Selim Rakib ,  Ronny Hadani

IPC: H04W28/16 ,  H04W72/04 ,  H04W72/08 ,  H04W16/24

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.

公开(公告)号：US20210126750A1

公开(公告)日：2021-04-29

申请号：US17139478

申请日：2020-12-31

Applicant: Cohere Technologies, Inc.

Inventor： Shachar Kons ,  Ronny Hadani ,  Yoav Hebron

IPC: H04L5/00 ,  H04L23/02 ,  H04W72/04 ,  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：US20190342126A1

公开(公告)日：2019-11-07

申请号：US16512055

申请日：2019-07-15

Applicant: Cohere Technologies, Inc.

Inventor： Ronny Hadani ,  Shachar Kons

IPC: H04L25/03 ,  H04L25/02 ,  H04L25/08 ,  H04L1/00 ,  H04L25/00 ,  H04L27/26

Abstract: An iterative two dimension equalizer usable in a receiver of orthogonal time frequency space (OTFS) modulated signals is described. In one configuration of the equalizer, a forward path generates, from received time-frequency domain samples and a channel estimate, estimates of data bits and likelihood numbers associated with the estimates of data bits, generated by delay-Doppler domain processing. In the feedback direction, the estimates of data bits are used to generate symbol estimates and autocorrelation matrix estimate in the time domain. In another configuration, a soft symbol mapper is used in the feedback direction for directly generating the feedback input symbol estimate without having to generate estimates of data bits.

公开(公告)号：US20180167165A1

公开(公告)日：2018-06-14

申请号：US15889867

申请日：2018-02-06

Applicant: Cohere Technologies

Inventor： Shachar Kons ,  Ronny Hadani ,  Christian Ibars Casas

IPC: H04L1/00 ,  H04L27/26 ,  H04L25/03

CPC classification number: H04L1/0071 ,  H04L1/00 ,  H04L1/0041 ,  H04L1/0045 ,  H04L25/03057 ,  H04L27/2626 ,  H04L27/36 ,  H04L2025/03363 ,  H04L2025/03611

Abstract: A wireless communication method for transmitting wireless signals from a transmitter includes receiving information bits for transmission, segmenting the information bits into a stream of segments, applying a corresponding forward error correction (FEC) code and an interleaver to each of the stream of segments and combining outputs of the interleaving to generate a stream of symbols, processing the stream of symbols to generate a waveform, and transmitting the waveform over a communication medium.

公开(公告)号：US12074658B2

公开(公告)日：2024-08-27

申请号：US17760086

申请日：2021-01-27

Applicant: Cohere Technologies, Inc.

Inventor： Shachar Kons ,  Ronny Hadani

IPC: H04B17/373 ,  H04L25/02

CPC classification number: H04B17/373 ,  H04L25/0222 ,  H04L25/023

Abstract: Methods, apparatus and systems for wireless communication are described. One example method includes estimating, based on channel quality information for a first communication channel during a first time interval, a predicted quality of a second communication channel during a second time interval that is a latency interval after the first time interval and using the predicted quality for processing transmissions on the second communication channel during the second time interval.

公开(公告)号：US11974167B2

公开(公告)日：2024-04-30

申请号：US17309950

申请日：2019-12-31

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.

公开(公告)号：US11362866B2

公开(公告)日：2022-06-14

申请号：US17188845

申请日：2021-03-01

Applicant: Cohere Technologies, Inc.

Inventor： Shachar Kons ,  Ronny Hadani ,  Michail Tsatsanis

IPC: H03H7/30 ,  H03H7/40 ,  H03K5/159 ,  H04L25/02 ,  H04L5/00 ,  H04L27/01 ,  H04L27/34

Abstract: In a transmitter apparatus, a known reference signal is superimposed on top of a data signal that is typically not known a priori to a receiver and the combined signal is transmitted. At a receiver, an iterative channel estimation and equalization technique is used to recover the reference signal and the unknown data signal. In the initial iteration, the known reference signal is recovered by treating the data signal as noise. Subsequent iterations are used to improve estimation of received reference signal and the unknown data signal.

公开(公告)号：US11324008B2

公开(公告)日：2022-05-03

申请号：US16638873

申请日：2018-08-14

Applicant: Cohere Technologies, Inc.

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

IPC: H04W72/04 ,  H04L5/00

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 subcarriers, 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.