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    Pulse shaping in delay-doppler domain
    1.
    发明授权
    Pulse shaping in delay-doppler domain 有权

    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.

    Localization and auto-calibration in a wireless network
    2.
    发明授权
    Localization and auto-calibration in a wireless network 有权

    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.

    DISTRIBUTED COOPERATIVE OPERATION OF WIRELESS CELLS BASED ON SPARSE CHANNEL REPRESENTATIONS
    3.
    发明公开
    DISTRIBUTED COOPERATIVE OPERATION OF WIRELESS CELLS BASED ON SPARSE CHANNEL REPRESENTATIONS 审中-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.

    PULSE SHAPING IN DELAY-DOPPLER DOMAIN
    4.
    发明公开
    PULSE SHAPING IN DELAY-DOPPLER DOMAIN 审中-公开

    公开(公告)号：US20240267276A1

    公开(公告)日：2024-08-08

    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.

    ORTHOGONAL TIME FREQUENCY SPACE MODULATION TECHNIQUES
    5.
    发明公开
    ORTHOGONAL TIME FREQUENCY SPACE MODULATION TECHNIQUES 审中-公开

    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.

    OTFS method of data channel characterization and uses thereof
    8.
    发明授权
    OTFS method of data channel characterization and uses thereof 有权

    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

    IPC: H04W24/02 ,  H04L25/02 ,  H04L5/00 ,  H04L27/26 ,  H04W72/08 ,  H04B7/10

    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.

    ORTHOGONAL TIME FREQUENCY SPACE COMMUNICATION SYSTEM COMPATIBLE WITH OFDM
    10.
    发明申请
    ORTHOGONAL TIME FREQUENCY SPACE COMMUNICATION SYSTEM COMPATIBLE WITH OFDM 审中-公开
    正交时间空间通信系统与OFDM兼容

    公开(公告)号：US20170012749A1

    公开(公告)日：2017-01-12

    申请号：US15208545

    申请日：2016-07-12

    Applicant: Cohere Technologies, Inc.

    Inventor： Shlomo Selim Rakib ,  Ronny Hadani

    IPC: H04L5/00 ,  H04L27/26

    CPC classification number: H04L5/0007 ,  H04L27/2639 ,  H04L27/2697

    Abstract: A system and method for orthogonal time frequency space communication and waveform generation compatible with OFDM. The method includes receiving a plurality of information symbols and encoding an N×M array containing the plurality of information symbols into a two-dimensional array of modulation symbols by spreading each of the plurality of information symbols with respect to both time and frequency. The two-dimensional array of modulation symbols is then transmitted along with one or more OFDM symbols using a plurality of narrowband subcarriers.

    Abstract translation: 一种与OFDM正交的时空通信和波形生成的系统和方法。 该方法包括通过相对于时间和频率扩展多个信息符号中的每一个来接收多个信息符号并将包含多个信息符号的N×M阵列编码为调制符号的二维阵列。 然后使用多个窄带子载波与一个或多个OFDM符号一起发送调制符号的二维阵列。

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