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：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：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.