公开(公告)号：WO2022232830A1

公开(公告)日：2022-11-03

申请号：PCT/US2022/072002

申请日：2022-04-29

Applicant: COHERE TECHNOLOGIES, INC.

Inventor： RAKIB, Shlomo Selim ,  HADANI, Ronny ,  KONS, Shachar ,  AMBROSE, Clayton

IPC: H04L27/26 ,  H04L5/00

Abstract: Methods, systems and devices for wireless communication are described. One example method includes mapping information bits to transmission resources in a two-dimensional delay-Doppler grid In this example, the two-dimensional delay-Doppler grid includes N Doppler elements along a Doppler dimension and M delay elements along a delay dimension, and N and M are positive integers. The example method continues with converting a result of the mapping to a signal waveform, and generating an orthogonal time frequency space (OTFS) waveform by spreading the signal waveform using a spreading scheme. In some examples, the signal waveform includes an ultra-wide band (UWB) waveform.

公开(公告)号：WO2021062354A1

公开(公告)日：2021-04-01

申请号：PCT/US2020/053045

申请日：2020-09-28

Applicant: COHERE TECHNOLOGIES, INC.

Inventor： RAKIB, Shlomo Selim ,  HADANI, Ronny ,  KONS, Shachar

IPC: H04B7/0404 ,  H04B7/0408 ,  H04L5/00

Abstract: A wireless communication device includes a feed port comprising multiple input feeds, a precoding subsystem that is electrically connected to the feed port; and an antenna subsystem electrically connected to the precoding subsystem. The antenna subsystem is configured to transmit an output signal of the precoding subsystem to multiple wireless stations using multiple beams. The precoding subsystem is configured to perform a precoding operation on an input signal from the feed port, wherein the precoding operation maximizes a desired signal level to interference ratio of transmissions to the multiple wireless stations.

公开(公告)号：WO2020142520A1

公开(公告)日：2020-07-09

申请号：PCT/US2019/069115

申请日：2019-12-31

Applicant: COHERE TECHNOLOGIES, INC.

Inventor： KONS, Shachar ,  RAKIB, Shlomo Selim ,  HADANI, Ronny

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

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：WO2019051093A1

公开(公告)日：2019-03-14

申请号：PCT/US2018/049759

申请日：2018-09-06

Applicant: COHERE TECHNOLOGIES

Inventor： NAMBOODIRI, Devan ,  HADANI, Ronny ,  DELFELD, James

IPC: G06F17/15 ,  H04B7/08 ,  H04L1/06 ,  H04L25/02

CPC classification number: H04L25/03019 ,  H04L1/06 ,  H04L25/03159 ,  H04L27/26 ,  H04L27/2639 ,  H04L27/2647

Abstract: Methods, systems and devices for lattice reduction in decision feedback equalizers for orthogonal time frequency space (OTFS) modulation are described. An exemplary wireless communication method, implementable by a wireless communication receiver apparatus, includes receiving a signal comprising information bits modulated using OTFS modulation scheme. Each delay-Doppler bin in the signal is modulated using a quadrature amplitude modulation (QAM) mapping. The method also includes estimating the information bits based on an inverse of a single error covariance matrix of the signal, with the single error covariance matrix being representative of an estimation error for all delay-Doppler bins in the signal.

公开(公告)号：WO2018200577A1

公开(公告)日：2018-11-01

申请号：PCT/US2018/029209

申请日：2018-04-24

Applicant: COHERE TECHNOLOGIES

Inventor： HADANI, Ronny

IPC: H04J3/00

Abstract: A wireless data transmission technique includes encoding information bits as a periodic sequence of quadrature amplitude modulation (QAM) symbols, convolving the periodic sequence with a periodic pulse function, thereby generating a filtered periodic sequence, transforming the filtered periodic sequence to a delay-Doppler domain waveform, converting the delay-Doppler domain waveform to a time domain waveform, and transmitting the time domain waveform.

公开(公告)号：WO2018064605A1

公开(公告)日：2018-04-05

申请号：PCT/US2017/054560

申请日：2017-09-29

Applicant: COHERE TECHNOLOGIES

Inventor： DELFELD, James ,  IBARS CASAS, Christian ,  HEBRON, Yoav ,  HADANI, Ronny ,  RAKIB, Shlomo

IPC: H04L5/00 ,  H04L23/02 ,  H04L27/26 ,  H04W28/06 ,  H04W72/04 ,  H04B1/692

Abstract: A method of reducing peak to average power ratio of uplink transmission includes, assigning a slice of transmission resource to uplink transmission from a user equipment, where all resource elements in the slice have a same Doppler value, mapping data to the slice, performing orthogonal time frequency space transformation to generate time-frequency domain data and processing the time-frequency domain data for transmission.

Abstract translation: 降低上行链路传输的峰均功率比的方法包括：将传输资源片分配给来自用户设备的上行链路传输，其中片中的所有资源单元具有相同的多普勒值;映射 数据到切片，执行正交时频空间变换以生成时频域数据并处理该时频域数据以进行传输。

公开(公告)号：WO2017173389A1

公开(公告)日：2017-10-05

申请号：PCT/US2017/025578

申请日：2017-03-31

Applicant: COHERE TECHNOLOGIES

Inventor： HADANI, Ronny ,  KNOS, Shachar

IPC: H04L27/01 ,  H03D1/04 ,  H03D1/06 ,  H04L25/00 ,  H04L25/08

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.

Abstract translation: 描述了可用于正交时间频率空间（OTFS）调制信号的接收器中的迭代二维均衡器。 在均衡器的一种配置中，正向路径从接收到的时间 - 频率域采样和信道估计生成由延迟 - 多普勒域处理生成的与数据比特的估计相关联的数据比特和似然数的估计。 在反馈方向上，数据位的估计被用于在时域中生成符号估计和自相关矩阵估计。 在另一种配置中，在反馈方向上使用软符号映射器来直接生成反馈输入符号估计，而不必生成数据比特的估计。

公开(公告)号：WO2017044660A1

公开(公告)日：2017-03-16

申请号：PCT/US2016/050825

申请日：2016-09-08

Applicant: COHERE TECHNOLOGIES, INC.

Inventor： HADANI, Ronny ,  RAKIB, Shlomo Selim

IPC: H04J11/00

CPC classification number: H04L27/2697 ,  H04L27/2639

Abstract: A method and system for multiple access in a system utilizing two-dimensional signal modulation. The method includes spreading data symbols arranged in a two-dimensional information domain onto sets of grid points respectively associated with different users in a time-frequency domain. The spreading is performed using two-dimensional basis functions uniquely associated with positions on a lattice in the information domain corresponding to the data symbols. A modulated signal is then generated using the sets of transformed symbols. The sets of grid points associated with the different users may be interleaved within the time-frequency domain or may form non-interleaved windows.

Abstract translation: 一种利用二维信号调制的系统中多次访问的方法和系统。 该方法包括将在二维信息域中排列的数据符号扩展到在时间 - 频率域中分别与不同用户相关联的网格点集合。 使用与对应于数据符号的信息域中的格子上的位置唯一相关联的二维基函数来执行扩展。 然后使用变换符号集合生成调制信号。 与不同用户相关联的网格点集合可以在时间 - 频域内被交织或者可以形成非交错的窗口。

公开(公告)号：WO2016183230A1

公开(公告)日：2016-11-17

申请号：PCT/US2016/031909

申请日：2016-05-11

Applicant: COHERE TECHNOLOGIES

Inventor： HADANI, Ronny ,  SHLOMO, Selim, Rakib

IPC: H04B1/10 ,  H04B1/69 ,  H04B1/692 ,  H04B1/713 ,  H04B7/005 ,  H04L27/01

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.

Abstract translation: 使用正交时间频移（OTFS）无线波形的数据通信的替代方法，其被配置为以对通信信道失真和频移相对不敏感的方式发送数据。 与申请人教授的现有方法相反，本公开教导了将用于数据传输的数据符号映射到以原始数据符号的形式进行操作的类似二维傅立叶变换的替代调制方案。 该二维傅里叶变换依次通过滤波器组的窄带滤波器，并且该输出依次用于根据各种时间片调制发射的波形，直到整个二维傅立叶变换被发送。 在接收机处，并且该过程的逆可以用于表征数据信道并校正接收到的信道的信道失真，从而接收到原始数据符号的清晰形式。

公开(公告)号：WO2023028601A1

公开(公告)日：2023-03-02

申请号：PCT/US2022/075539

申请日：2022-08-26

Applicant: COHERE TECHNOLOGIES, INC.

Inventor： KONS, Shachar ,  RAKIB, Shlomo Selim ,  HADANI, Ronny

IPC: H04L27/26 ,  H04L5/00

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.