公开(公告)号：WO2017100666A1

公开(公告)日：2017-06-15

申请号：PCT/US2016/065961

申请日：2016-12-09

Applicant: COHERE TECHNOLOGIES

Inventor： HADANI, Ronny ,  RAKIB, Shlomo, Selim ,  MONK, Anton ,  TSATSANIS, Michail ,  HEBRON, Yoav

IPC: H03K5/19 ,  H03K5/26 ,  G01S13/53

CPC classification number: H04L27/2697 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2639

Abstract: A wireless communication method includes generating a pilot signal that is represented using a complex exponential signal having a first linear phase in a time dimension and a second linear phase in a frequency dimension; and transmitting the pilot signal over a wireless communication channel using transmission resources that are designated for pilot signal transmission in a legacy transmission network such as a Long Term Evolution (LTE) network.

Abstract translation: 无线通信方法包括：生成导频信号，该导频信号使用具有时间维度上的第一线性相位和频率维度上的第二线性相位的复指数信号来表示; 以及使用在诸如长期演进（LTE）网络之类的传统传输网络中指定用于导频信号传输的传输资源，通过无线通信信道传输导频信号。

公开(公告)号：WO2017173160A1

公开(公告)日：2017-10-05

申请号：PCT/US2017/025166

申请日：2017-03-30

Applicant: COHERE TECHNOLOGIES

Inventor： HEBRON, Yoav ,  RAKIB, Shlomo, Selim ,  HADANI, Ronny ,  TSATSANIS, Michail ,  AMBROSE, Clayton ,  DELFELD, Jim ,  FANFELLE, Robert

IPC: H03H7/30 ,  H04B1/10 ,  H04B7/005 ,  H04L27/01

Abstract: Techniques for performing channel estimation in an orthogonal time, frequency and space (OTFS) communication system include receiving a wireless signal comprising a data signal portion and a pilot signal portion in which the pilot signal portion includes multiple pilot signals multiplexed together in the OTFS domain, performing two-dimensional channel estimation in a time-frequency domain based on a minimum mean square error (MMSE) optimization criterion, and recovering information bits using a channel estimate obtained from the two-dimensional channel estimation.

Abstract translation: 用于在正交时间，频率和空间（OTFS）通信系统中执行信道估计的技术包括接收包括数据信号部分和导频信号部分的无线信号，其中导频信号部分包括多个导频 在OTFS域中复用在一起的信号，基于最小均方误差（MMSE）优化准则在时间 - 频率域中执行二维信道估计，并且使用从二维信道估计获得的信道估计来恢复信息比特。

公开(公告)号：WO2018106731A1

公开(公告)日：2018-06-14

申请号：PCT/US2017/064777

申请日：2017-12-05

Applicant: COHERE TECHNOLOGIES

Inventor： RAKIB, Shlomo, Selim ,  HADANI, Ronny ,  BENNER, Richard ,  FANFELLE, Robert

IPC: H01Q21/00 ,  H01Q21/06 ,  H01Q21/20 ,  H01Q25/00 ,  H04B7/26

Abstract: 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.

公开(公告)号：WO2017147439A1

公开(公告)日：2017-08-31

申请号：PCT/US2017/019376

申请日：2017-02-24

Applicant: COHERE TECHNOLOGIES

Inventor： HADANI, Ronny ,  RAKIB, Shlomo, Selim ,  MONK, Anton ,  TSATSANIS, Michail ,  HEBRON, Yoav

IPC: H04B1/10 ,  H04B1/46 ,  H04B1/69 ,  H04B1/707 ,  H04L12/28 ,  H04L12/56 ,  H04W24/08

CPC classification number: H04B1/10 ,  H04B1/46 ,  H04B1/69 ,  H04B1/707 ,  H04J2011/0016 ,  H04L5/0026 ,  H04L5/0035 ,  H04L5/0048 ,  H04L5/006 ,  H04L5/0094 ,  H04L12/28

Abstract: In a wireless communication network, pilot signals are transmitted over a wireless communication channel by determining a maximum delay spread for a transmission channel, determining a maximum Doppler frequency spread for the transmission channel, and allocating a set of transmission resources in a time-frequency domain to a number of pilot signals based on the maximum delay spread and the maximum Doppler frequency spread.

Abstract translation: 在无线通信网络中，通过确定传输信道的最大延迟扩展，确定传输信道的最大多普勒频率扩展，以及分配一组 基于最大时延扩展和最大多普勒频率扩展，将时频域中的传输资源分配给多个导频信号。

公开(公告)号：WO2017165697A1

公开(公告)日：2017-09-28

申请号：PCT/US2017/023892

申请日：2017-03-23

Applicant: COHERE TECHNOLOGIES

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

IPC: H04L5/00 ,  H04L27/26

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.

Abstract translation: 描述了用于发送和接收参考信号的无线通信技术。 参考信号可以包括使用与数据传输资源分开的传输资源传输的导频信号。 导频信号从基站连续发送到正在服务的用户设备。 导频信号从延迟 - 多普勒域信号中产生，该信号被处理以获得时间频率信号，所述时间频率信号在时间频率域中占据与对应于数据信号传输的网格不重叠的二维网格。

公开(公告)号：WO2017087706A1

公开(公告)日：2017-05-26

申请号：PCT/US2016/062590

申请日：2016-11-17

Applicant: COHERE TECHNOLOGIES

Inventor： HADANI, Ronny ,  RAKIB, Shlomo, Selim ,  MONK, Anton ,  TSATSANIS, Michail ,  HEBRON, Yoav

IPC: H04L5/06

CPC classification number: H04L27/32 ,  H04L27/18 ,  H04L27/2639 ,  H04L27/2697

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.

Abstract translation: 正交时间频率空间（OTFS）是一种新颖的调制方案，对于5G系统具有显着的优势。 本文介绍OTFS背后的基本理论及其优点。 我们首先对双衰落延迟 - 多普勒通道进行数学描述，然后开发针对该通道的调制。 我们在时频域对时变时延 - 多普勒信道进行建模，并导出一个新的域（OTFS域），我们在这里显示信道被变换为时间不变的信道，所有符号都看到相同的信噪比。 我们探索诸如延迟和多普勒分辨率等调制方面的问题，并解决设计和实现问题，如复用多个用户和评估复杂性。 最后，我们展示一些性能结果，我们将展示OTFS的优越性。

公开(公告)号：WO2017011478A1

公开(公告)日：2017-01-19

申请号：PCT/US2016/041940

申请日：2016-07-12

Applicant: COHERE TECHNOLOGIES, INC.

Inventor： RAKIB, Shlomo, Selim ,  HADANI, Ronny

IPC: H04J9/00

CPC classification number: H04L27/2639

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 NxM 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正交的时频空间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阵列编码成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。