公开(公告)号：US11218204B2

公开(公告)日：2022-01-04

申请号：US17002140

申请日：2020-08-25

Applicant: Apple Inc.

Inventor： Fang Yuan

IPC: H04B7/06 ,  H04B7/0456

Abstract: A method and a communication device adapted for designing a hybrid beamforming (HB) precoding used in a mobile communication system with an antenna array, the method including aggregating spatial channel vectors received by the antenna array; performing a linear factorization of the aggregation; truncating the linear factorization to generate truncated channels; and designing the HB precoding based on the truncated channels. wherein the HB precoding includes a linearly generated analog beamforming component and a linearly generated digital beamforming component.

公开(公告)号：US11190260B2

公开(公告)日：2021-11-30

申请号：US16644635

申请日：2017-09-19

Applicant: Apple Inc.

Inventor： Fang Yuan ,  Xu Zhang

IPC: H04B7/06 ,  H04W72/08

Abstract: Herein is disclosed a beam estimation system comprising one or more transceivers, configured to transmit a plurality of first-stage reference beams, and to receive a first quality identifier corresponding to a first first-stage reference beam with a strongest signal strength and a second quality identifier corresponding to a second first-stage reference beam with a second strongest signal strength; and one or more processors, configured to determine a second-stage reference beam region based on the first quality identifier and the second quality identifier.

公开(公告)号：US20200228188A1

公开(公告)日：2020-07-16

申请号：US16828072

申请日：2020-03-24

Applicant: Apple Inc.

Inventor： Fang Yuan

IPC: H04B7/08 ,  H04B7/06 ,  H04B17/336 ,  H04B17/364 ,  H04L5/00 ,  H04L25/02

Abstract: A communication device and a method for Orthogonal Frequency Division Multiplexing (OFDM) configured to receive a signal from a second device; perform a channel estimation on the signal, wherein the channel estimation comprises determining a channel path gain, a channel path delay, and at least one of a channel path angle of arrival (AoA) or a channel path angle of departure (AoD); determine an optimal analog beamforming direction based on the channel estimation; and communicating the data using the analog beamforming.

公开(公告)号：US20210067224A1

公开(公告)日：2021-03-04

申请号：US16644635

申请日：2017-09-19

Applicant: Apple Inc.

Inventor： Fang Yuan ,  Xu Zhang

IPC: H04B7/06 ,  H04W72/08

Abstract: Herein is disclosed a beam estimation system comprising one or more transceivers, configured to transmit a plurality of first-stage reference beams, and to receive a first quality identifier corresponding to a first first-stage reference beam with a strongest signal strength and a second quality identifier corresponding to a second first-stage reference beam with a second strongest signal strength; and one or more processors, configured to determine a second-stage reference beam region based on the first quality identifier and the second quality identifier.