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1. 发明授权

US10568143B2 Windowed sequence for random access method and apparatus 有权
公开(公告)号：US10568143B2
公开(公告)日：2020-02-18
申请号：US15937701
申请日：2018-03-27
申请人： Cohere Technologies, Inc.
发明人： James Delfeld , Ronny Hadani , Konstantinos Dimou
IPC分类号： H04W74/08 , H04L5/00 , H04L27/26
摘要： Methods, devices and systems for generating physical random access channel sequences that can be used to efficiently access a wireless network are disclosed. One exemplary method of accessing a wireless network includes generating a repeated orthogonal sequence by repeating a base orthogonal sequence, generating a random access sequence by applying a window function to the repeated orthogonal sequence, and accessing the wireless network using a random access procedure by selectively using the random access sequence. In an example, the base orthogonal sequence may be a Zadoff-Chu sequence. In another example, the window function may be a root-Hamming window.

2. 发明申请

US20190173630A1 MULTI-USER MULTIPLEXING OF ORTHOGONAL TIME FREQUENCY SPACE SIGNALS 审中-公开
公开(公告)号：US20190173630A1
公开(公告)日：2019-06-06
申请号：US16273482
申请日：2019-02-12
申请人： Cohere Technologies, Inc.
发明人： Shachar Kons , Ronny Hadani , Yoav Hebron
IPC分类号： H04L5/00 , H04J4/00 , H04W72/12
摘要： 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.

3. 发明授权

US10034184B2 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
申请人： Cohere Technologies, Inc.
发明人： Ronny Hadani , Shlomo Selim Rakib
IPC分类号： H04W24/02 , H04L25/02 , H04L5/00 , H04L27/26 , H04W72/08 , H04B7/10
摘要： 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.

4. 发明申请

US20170244524A1 VARIABLE LATENCY DATA COMMUNICATION USING ORTHOGONAL TIME FREQUENCY SPACE MODULATION 审中-公开
公开(公告)号：US20170244524A1
公开(公告)日：2017-08-24
申请号：US15374989
申请日：2016-12-09
申请人： COHERE TECHNOLOGIES, INC.
发明人： Ronny Hadani , Shlomo Selim Rakib
IPC分类号： H04L5/00 , H04B1/02 , H04L27/26
CPC分类号： H04L5/0007 , H04B1/02 , H04B1/12 , H04B7/0413 , H04B7/0456 , H04J11/0026 , H04J2011/0016 , H04L5/0005 , H04L5/0016 , H04L5/0023 , H04L5/0048 , H04L23/02 , H04L25/03834 , H04L27/26 , H04L27/2634 , H04L27/2636 , H04L27/2639 , H04L27/265 , H04L27/2655 , H04L27/2697 , H04W4/70
摘要： A system and method of variable latency data transmission. The method includes transforming a first original data frame in accordance with a first time-frequency transformation so as to provide a first transformed data frame wherein the first time-frequency transformation is associated with a first latency. The method further includes transforming a second original data frame in accordance with a second time-frequency transformation so as to provide a second transformed data frame wherein the second time-frequency transformation is associated with a second latency. Using a transmitter, elements of the first transformed data frame are transmitted over a first frame period corresponding to the first latency and elements of the second transformed data frame are transmitted over a second frame period corresponding to the second latency wherein the first frame period is different from the second frame period.

5. 发明授权

US09712354B2 Modulation and equalization in an orthonormal time-frequency shifting communications system 有权
公开(公告)号：US09712354B2
公开(公告)日：2017-07-18
申请号：US14809129
申请日：2015-07-24
申请人： COHERE TECHNOLOGIES, INC.
发明人： Ronny Hadani , Salim Shlomo Rakib
IPC分类号： H04L27/26 , H04L27/01 , H04B1/10 , H04B7/005 , H04L5/00 , H04L23/02 , H04L25/03
CPC分类号： H04L27/01 , H04B1/1027 , H04B7/005 , H04L5/0016 , H04L5/0044 , H04L23/02 , H04L25/03834 , H04L27/2634 , H04L27/265 , H04L27/2655 , H04L27/2697
摘要： A method of receiving data including receiving, on one or more carrier waveforms, signals representing a plurality of data elements of an original data frame wherein each of the data elements are represented by cyclically time shifted and cyclically frequency shifted versions of a known set of waveforms. The method further includes generating, based upon the signals, a received data frame and generating an equalized data frame by performing an equalization operation using elements of the received data frame, the equalization operation correcting for distortion introduced into the signals during propagation of the carrier waveforms through a channel.

6. 发明申请

US20170033899A1 ORTHOGONAL TIME FREQUENCY SPACE MODULATION SYSTEM FOR THE INTERNET OF THINGS 审中-公开
标题翻译：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
申请人： Cohere Technologies, Inc.
发明人： Selim Shlomo Rakib , Ronny Hadani
IPC分类号： H04L5/00 , H04L29/08
CPC分类号： 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
摘要： 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.
摘要翻译：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。

7. 发明申请

US20170012749A1 ORTHOGONAL TIME FREQUENCY SPACE COMMUNICATION SYSTEM COMPATIBLE WITH OFDM 审中-公开
标题翻译：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
申请人： Cohere Technologies, Inc.
发明人： Shlomo Selim Rakib , Ronny Hadani
IPC分类号： H04L5/00 , H04L27/26
CPC分类号： H04L5/0007 , H04L27/2639 , H04L27/2697
摘要： 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.
摘要翻译：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。

8. 发明授权

US09294315B2 Modulation and equalization in an orthonormal time-frequency shifting communications system 有权
标题翻译：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
申请人： COHERE TECHNOLOGIES, INC.
发明人： Ronny Hadani , Selim Shlomo Rakib
IPC分类号： H04B1/69 , H04L25/03 , H04B1/692 , H04L5/00 , H04L23/02 , H04L27/26
CPC分类号： H04L25/03343 , H04B1/692 , H04L5/0016 , H04L5/0044 , H04L23/02 , H04L25/03828 , H04L25/03834 , H04L27/2634 , H04L27/265 , H04L27/2655 , H04L27/2697
摘要： 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.
摘要翻译：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。

9. 发明授权

US09083483B1 Orthonormal time-frequency shifting and spectral shaping communications method 有权
标题翻译：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
申请人： Cohere Technologies, Inc.
发明人： Shlomo Selim Rakib , Ronny Hadani
IPC分类号： H04J11/00 , H04L23/02
CPC分类号： H04J11/0063 , H04L5/0016 , H04L5/0044 , H04L23/02 , H04L25/03834 , H04L27/2634 , H04L27/265 , H04L27/2655 , H04L27/2697 , H04W28/065 , H04W72/00
摘要： 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.
摘要翻译：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。

10. 发明授权

US11558157B2 Fixed wireless access using orthogonal time frequency space modulation 有权
公开(公告)号：US11558157B2
公开(公告)日：2023-01-17
申请号：US17303436
申请日：2021-05-28
申请人： Cohere Technologies, Inc.
发明人： Shlomo Selim Rakib , Ronny Hadani , Richard Benner , Robert Fanfelle
IPC分类号： H04L5/00 , H01Q21/24 , H04B7/06 , H04B7/12
摘要： 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.

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