公开(公告)号：US10361759B2

公开(公告)日：2019-07-23

申请号：US16211014

申请日：2018-12-05

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, including determining an initial precoding for each of the users 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：US20190115959A1

公开(公告)日：2019-04-18

申请号：US16211014

申请日：2018-12-05

Applicant: Facebook, Inc.

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

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

CPC classification number: H04B7/0452 ,  H04B7/0456 ,  H04B7/0465 ,  H04W52/243 ,  H04W52/283 ,  H04W52/346 ,  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, including determining an initial precoding for each of the users 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：US10181880B1

公开(公告)日：2019-01-15

申请号：US15784089

申请日：2017-10-14

Applicant: Facebook, Inc.

Inventor： Ahmed Alkhateeb ,  Sam Padinjaremannil Alex ,  Ali Yazdan Panah ,  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 training a transmission channel between a base station and each of a plurality of users and determining a precoding of transmission signals to each of the plurality of users from the base station. The training 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, includes determining an initial precoding for each of the users 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：US10084517B1

公开(公告)日：2018-09-25

申请号：US15626140

申请日：2017-06-18

Applicant: Facebook, Inc.

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

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

CPC classification number: H04B7/0452 ,  H04B7/0456 ,  H04L25/03343 ,  H04L25/03917 ,  H04L25/03961 ,  H04W28/04 ,  H04W88/085

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. A channel dimension reduction matrix is determined based upon a composite of the channel estimates for the plurality of subcarriers, wherein dimensions of the channel dimension reduction matrix are less than dimensions of the transmission channel matrix. The method further includes determining a precoding matrix for the terminal based on the channel dimension reduction matrix, wherein the precoding matrix is multi-carrier signal independent, determining an effective channel based on a channel estimate of the transmission channel and based on the precoding matrix of the terminal, and determining a precoding matrix for the central processing unit based on the effective channel.

公开(公告)号：US20180183501A1

公开(公告)日：2018-06-28

申请号：US15389608

申请日：2016-12-23

Applicant: Facebook, Inc.

Inventor： Qi Qu ,  Sam Padinjaremannil Alex ,  Ali YAZDAN PANAH ,  Abhishek Tiwari ,  Yan Yan ,  Hongyu Zhou ,  Pratheep Bondalapati

IPC: H04B7/0456 ,  H04L5/00 ,  H01Q1/28

CPC classification number: H04B7/0456 ,  H01Q1/288 ,  H04B7/06 ,  H04B7/08

Abstract: Apparatuses, methods, and systems for MIMO inter-stream interference cancellation are disclosed. One method includes determining a channel matrix between a plurality of transmitting antennas of a transmitter and a plurality of receiving antennas of a receiver, determining a plurality of channel propagation delays based on a propagation delay between each of the plurality of transmitting antennas and each of the plurality of receiving antennas, preprocessing, by the transmitter, streams of symbols for each transmitting antenna for transmission based on the plurality of channel propagation delays and based on the channel matrix, and transmitting, by the transmitter, the preprocessed symbol streams through the plurality of transmitting antennas.

公开(公告)号：US20190296806A1

公开(公告)日：2019-09-26

申请号：US16435511

申请日：2019-06-09

Applicant: Facebook, Inc.

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

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

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：US20190013845A1

公开(公告)日：2019-01-10

申请号：US16110397

申请日：2018-08-23

Applicant: Facebook, Inc.

Inventor： Qi Qu ,  Sam Padinjaremannil Alex ,  Ali YAZDAN ,  Abhishek Tiwari ,  Yan Yan ,  Hongyu Zhou ,  Pratheep Bondalapati

IPC: H04B7/0456 ,  H01Q1/28 ,  H04B7/06 ,  H04B7/08

Abstract: Apparatuses, methods, and systems for MIMO inter-stream interference cancellation are disclosed. One method includes determining a channel matrix between a plurality of transmitting antennas of a transmitter and a plurality of receiving antennas of a receiver, determining a plurality of channel propagation delays based on a propagation delay between each of the plurality of transmitting antennas and each of the plurality of receiving antennas, determining differences in the plurality of channel propagation delays, preprocessing, by the transmitter, streams of symbols for each transmitting antenna for transmission based on the differences in the plurality of channel propagation delays and based on the channel matrix, and transmitting, by the transmitter, the preprocessed symbol streams through the plurality of transmitting antennas.

公开(公告)号：US20190013843A1

公开(公告)日：2019-01-10

申请号：US16109377

申请日：2018-08-22

Applicant: Facebook, Inc.

Inventor： Ahmed Alkhateeb ,  Ali YAZDAN PANAH ,  Qi Qu ,  Sam Alex

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

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：US10084518B2

公开(公告)日：2018-09-25

申请号：US15389608

申请日：2016-12-23

Applicant: Facebook, Inc.

Inventor： Qi Qu ,  Sam Padinjaremannil Alex ,  Ali Yazdan Panah ,  Abhishek Tiwari ,  Yan Yan ,  Hongyu Zhou ,  Pratheep Bondalapati

IPC: H04B7/0456 ,  H04B7/06 ,  H04B7/08 ,  H01Q1/28

CPC classification number: H04B7/0456 ,  H01Q1/288 ,  H01Q21/28 ,  H04B7/06 ,  H04B7/08

Abstract: Apparatuses, methods, and systems for MIMO inter-stream interference cancellation are disclosed. One method includes determining a channel matrix between a plurality of transmitting antennas of a transmitter and a plurality of receiving antennas of a receiver, determining a plurality of channel propagation delays based on a propagation delay between each of the plurality of transmitting antennas and each of the plurality of receiving antennas, preprocessing, by the transmitter, streams of symbols for each transmitting antenna for transmission based on the plurality of channel propagation delays and based on the channel matrix, and transmitting, by the transmitter, the preprocessed symbol streams through the plurality of transmitting antennas.

公开(公告)号：US10686511B2

公开(公告)日：2020-06-16

申请号：US15995523

申请日：2018-06-01

Applicant: Facebook, Inc.

Inventor： Hongyu Zhou ,  Qi Qu ,  Sam Padinjaremannil Alex

IPC: H04B7/06 ,  H04B7/0408 ,  H04W72/12 ,  H04W72/08 ,  H01Q3/26 ,  H04B1/04 ,  H04W16/10 ,  H04W72/04 ,  H04B1/00 ,  H01Q3/24 ,  H01Q3/46

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 operates 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 is divided into a plurality of groups. The controller operates 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.