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    SYSTEMS AND METHODS FOR SYMPLECTIC ORTHOGONAL TIME FREQUENCY SHIFTING MODULATION AND TRANSMISSION OF DATA
    11.
    发明申请
    SYSTEMS AND METHODS FOR SYMPLECTIC ORTHOGONAL TIME FREQUENCY SHIFTING MODULATION AND TRANSMISSION OF DATA 审中-公开

    公开(公告)号：US20180109284A1

    公开(公告)日：2018-04-19

    申请号：US15573793

    申请日：2016-05-11

    Applicant: Cohere Technologies

    Inventor： Ronny Hadani ,  Selim Rakib Shlomo

    IPC: H04B1/692 ,  H04L27/26

    CPC classification number: H04B1/692 ,  H04L1/0071 ,  H04L5/0021 ,  H04L27/2627 ,  H04L27/264 ,  H04L27/2649

    Abstract: An alternative method of data communications using orthogonal time frequency shifting (OTFS) wireless waveforms configured so as to transmit data in a manner that is relatively insensitive to communications channel distortions and frequency shifts. In contrast to prior methods taught by applicant, the present disclosure teaches an alternative modulation scheme that maps data symbols intended for data transmission onto a symplectic-like 2D Fourier transform which operates on a form of the original data symbols. This 2D Fourier transform in turn is passed through a filter bank of narrow band filters, and the output in turn used to modulate transmitted waveforms according to various time slices until the entire 2D Fourier transform has been transmitted. At the receiver, and inverse of this process can be used to both characterize the data channel and correct the received signals for channel distortions, thus receiving a clear form of the original data symbols.

    ORTHOGONAL TIME FREQUENCY SPACE MODULATION SYSTEM FOR THE INTERNET OF THINGS
    14.
    发明申请
    ORTHOGONAL TIME FREQUENCY SPACE MODULATION SYSTEM FOR THE INTERNET OF THINGS 审中-公开
    用于互联网的正交时空调制系统

    公开(公告)号：US20170033899A1

    公开(公告)日：2017-02-02

    申请号：US15143323

    申请日：2016-04-29

    Applicant: Cohere Technologies, Inc.

    Inventor： Selim Shlomo Rakib ,  Ronny Hadani

    IPC: H04L5/00 ,  H04L29/08

    CPC classification number: H04L5/0007 ,  H04B1/707 ,  H04J2011/0009 ,  H04J2011/0013 ,  H04J2011/0016 ,  H04L5/0005 ,  H04L5/0016 ,  H04L5/0048 ,  H04L23/02 ,  H04L25/03834 ,  H04L27/2636 ,  H04L27/2639 ,  H04L27/2646 ,  H04L27/2655 ,  H04L27/2697 ,  H04L67/10 ,  H04W72/00 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/162 ,  Y02D70/21 ,  Y02D70/22 ,  Y02D70/40

    Abstract: A system and method of operating an Internet of Things (IOT) device and an IOT manager device. The method includes determining, during operation of the IOT device in a low power mode, an orthogonal time frequency space (OTFS) transmission waveform using two-dimensional (2D) channel state information relevant to a delay-Doppler channel domain. The method further includes transmitting, during operation of the IOT device in a high power mode, the OTFS transmission waveform. The process of determining the OTFS transmission waveform may include, for example, receiving, from the IOT manager device, the 2D channel state information and storing it within a memory of the IOT device. Alternatively, at least one OTFS pilot transmission may be received from the IOT manager device and the 2D channel state information determined using the OTFS pilot transmission.

    Abstract translation: 一种操作物联网（IOT）设备和IOT管理器设备的系统和方法。 该方法包括使用与延迟多普勒信道域相关的二维（2D）信道状态信息来确定在低功率模式下的IOT设备的操作期间的正交时间频率空间（OTFS）传输波形。 该方法还包括在高功率模式下的IOT设备的操作期间传输OTFS传输波形。 确定OTFS传输波形的过程可以包括例如从IOT管理器设备接收2D信道状态信息并将其存储在IOT设备的存储器内。 或者，可以从IOT管理器设备接收至少一个OTFS导频传输，以及使用OTFS导频传输确定的2D信道状态信息。

    ORTHOGONAL TIME FREQUENCY SPACE COMMUNICATION SYSTEM COMPATIBLE WITH OFDM
    15.
    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。

    Modulation and equalization in an orthonormal time-frequency shifting communications system
    16.
    发明授权
    Modulation and equalization in an orthonormal time-frequency shifting communications system 有权
    正交时频移频通信系统中的调制和均衡

    公开(公告)号：US09294315B2

    公开(公告)日：2016-03-22

    申请号：US13927089

    申请日：2013-06-25

    Applicant: COHERE TECHNOLOGIES, INC.

    Inventor： Ronny Hadani ,  Selim Shlomo Rakib

    IPC: H04B1/69 ,  H04L25/03 ,  H04B1/692 ,  H04L5/00 ,  H04L23/02 ,  H04L27/26

    CPC classification number: H04L25/03343 ,  H04B1/692 ,  H04L5/0016 ,  H04L5/0044 ,  H04L23/02 ,  H04L25/03828 ,  H04L25/03834 ,  H04L27/2634 ,  H04L27/265 ,  H04L27/2655 ,  H04L27/2697

    Abstract: A method of data transmission including arranging a set of data elements into an original data frame having a first dimension of N elements and a second dimension of N elements, where N is greater than one. The method includes transforming the original data frame in accordance with a transformation matrix to form a first transformed data matrix having at least N2 transformed data elements wherein each of the transformed data elements is based upon a plurality of the data elements of the original data frame and wherein a first dimension of the first transformed data matrix corresponds to a frequency shift axis and a second dimension corresponds to a time shift axis. A permuted data matrix is formed by permuting at least a portion of the elements of the first transformed data matrix so as to shift the at least a portion of the elements with respect to the time shift axis. The method further includes transforming the permuted data matrix using a frequency-shift encoding matrix to form a transmit frame and generating a modulated signal in accordance with elements of the transmit frame.

    Abstract translation: 一种数据传输方法，包括将一组数据元素排列成具有N个元素的第一维度和N个元素的第二维度的原始数据帧，其中N大于1。 该方法包括根据变换矩阵变换原始数据帧以形成具有至少N2个变换数据元素的第一变换数据矩阵，其中每个变换数据元素基于原始数据帧的多个数据元素，以及 其中所述第一变换数据矩阵的第一维对应于频移轴，而第二尺寸对应于时移轴。 通过置换第一变换数据矩阵的元素的至少一部分以便相对于时移轴移动元素的至少一部分来形成置换的数据矩阵。 该方法还包括使用频移编码矩阵来变换置换的数据矩阵以形成发送帧并根据发送帧的元素生成调制信号。

    Orthonormal time-frequency shifting and spectral shaping communications method
    17.
    发明授权
    Orthonormal time-frequency shifting and spectral shaping communications method 有权
    正交时频移频和频谱整形通信方法

    公开(公告)号：US09083483B1

    公开(公告)日：2015-07-14

    申请号：US14341820

    申请日：2014-07-27

    Applicant: Cohere Technologies, Inc.

    Inventor： Shlomo Selim Rakib ,  Ronny Hadani

    IPC: H04J11/00 ,  H04L23/02

    CPC classification number: H04J11/0063 ,  H04L5/0016 ,  H04L5/0044 ,  H04L23/02 ,  H04L25/03834 ,  H04L27/2634 ,  H04L27/265 ,  H04L27/2655 ,  H04L27/2697 ,  H04W28/065 ,  H04W72/00

    Abstract: A wireless combination time, frequency and spectral shaping communications method that transmits data in convolution unit matrices (data frames) of N×N (N2), where generally either all N2 data symbols are received over N spreading time intervals (each composed of N time slices), or none are. To transmit, the N2 sized data frame matrix is multiplied by a first N×N time-frequency shifting matrix, permuted, and then multiplied by a second N×N spectral shaping matrix, thereby mixing each data symbol across the entire resulting N×N matrix (TFSSS data matrix). Columns from this N2 TFSSS data matrix are selected, modulated, and transmitted, on a one element per time slice basis. At the receiver, the replica TFSSS matrix is reconstructed and deconvoluted, revealing the data. The method can accommodate multiple users at once, can adapt to changing channel conditions, and is particularly useful for coping with channel impairments such as Doppler shifts.

    Abstract translation: 一种在N×N（N2）的卷积单位矩阵（数据帧）中传送数据的无线组合时间，频率和频谱整形通信方法，其中通常在N个扩展时间间隔（每个由N个时间间隔组成）接收所有N2个数据符号 切片），或没有。 为了发送，将N2大小的数据帧矩阵乘以第一N×N个时频移位矩阵，置换，然后乘以第二N×N频谱整形矩阵，从而将整个结果N×N 矩阵（TFSSS数据矩阵）。 来自该N2 TFSSS数据矩阵的列在每个时间片的基础上被选择，调制和传输。 在接收机处，复制TFSSS矩阵被重构和去卷积，揭示了数据。 该方法可以同时容纳多个用户，可以适应不断变化的信道条件，并且对于应对诸如多普勒频移的信道损伤特别有用。

    Method and apparatus for determining a channel state of an impaired data channel
    18.
    发明授权
    Method and apparatus for determining a channel state of an impaired data channel 有权

    公开(公告)号：US12149386B2

    公开(公告)日：2024-11-19

    申请号：US18307436

    申请日：2023-04-26

    Applicant: Cohere Technologies, Inc.

    Inventor： Ronny Hadani ,  Shlomo Selim Rakib

    IPC: H04L25/02 ,  H04L5/00 ,  H04L27/26 ,  H04W24/02 ,  H04W72/54 ,  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 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 data transmission methods as well.

    Reciprocal calibration for channel estimation based on second-order statistics
    19.
    发明授权
    Reciprocal calibration for channel estimation based on second-order statistics 有权

    公开(公告)号：US11962435B2

    公开(公告)日：2024-04-16

    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

    CPC classification number: H04L25/0204 ,  H04B7/0413 ,  H04L5/0048 ,  H04L25/0224 ,  H04L25/0248

    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.

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