公开(公告)号：US10659114B2

公开(公告)日：2020-05-19

申请号：US16109377

申请日：2018-08-22

Applicant: Facebook, Inc.

Inventor： Ahmed Alkhateeb ,  Ali Yazdan ,  Qi Qu ,  Sam Alex

IPC: H04B7/04 ,  H04L25/03 ,  H04B7/0452 ,  H04B7/0456 ,  H04W88/08 ,  H04W28/04

Abstract: Apparatuses, methods, and systems for precoding multi-carrier signals are disclosed. One method includes obtaining a transmission channel matrix between a terminal and a plurality of separate users, wherein the transmission channel matrix includes channel estimates for a plurality of subcarriers of the multi-carrier signal, wherein the terminal is one of a plurality of terminals interfaced with a central processing unit, and wherein the terminal communicates with the plurality of spatially separate user with the multi-carrier signals. The method further comprises determining a precoding for the terminal based on a distribution of user signal power across the transmission channel between the terminal and the plurality of spatially separate user, and determining a precoding for the central processing unit based on the precoding for the terminal and based on the transmission channel matrix, wherein a precoding matrix for the central processing unit is multi-carrier signal dependent.

公开(公告)号：US10454540B2

公开(公告)日：2019-10-22

申请号：US16435511

申请日：2019-06-09

Applicant: Facebook, Inc.

Inventor： Ahmed Alkhateeb ,  Sam Padinjaremannil Alex ,  Ali Yazdan ,  Qi Qu

IPC: H04B7/0456 ,  H04B7/0452 ,  H04W52/28 ,  H04W52/34 ,  H04W52/24 ,  H04W52/42

Abstract: Apparatuses, methods, and systems zone precoding are disclosed. One method includes determining a transmission zone for each of the plurality of users, wherein the transmission zone includes an angle of direction of a directional beam to each user, and a deviation of the angle of direction. Determining a precoding of transmission signals to each of the plurality of users from the base station based on the transmission zone associated with the user, and constructing the precoding for each user by adjusting the initial precoding for each user based on the transmission zone determined for each of the other users.

公开(公告)号：US20180375550A1

公开(公告)日：2018-12-27

申请号：US15995523

申请日：2018-06-01

Applicant: Facebook, Inc.

Inventor： Hongyu Zhou ,  Qi Qu ,  Sam Padinjaremannil Alex

IPC: H04B7/0408 ,  H04B7/06 ,  H04W72/12

Abstract: Apparatuses, methods, and systems for simultaneous communication through multiple beams of a wireless node, are disclosed. One apparatus includes a node, that includes a beamforming network, an antenna array, and a controller. The beamforming network operatates to receive a plurality of communication signals and generate a plurality of delayed signals. The antenna array generates an antenna pattern that includes a plurality of beams, wherein the plurality of beams are divided into a plurality of groups. The controller operate to control simultaneous communication of the node with a plurality of transceivers, including the node communicating with a first transceiver through a selected beam of a first group of beams and simultaneously the node communicating with another transceiver through a corresponding beam of another group of beams.