公开(公告)号：US20220059943A1

公开(公告)日：2022-02-24

申请号：US17384684

申请日：2021-07-23

Applicant: Samsung Electronics Co., Ltd.

Inventor： Sandy Saab ,  Mohammed Reza Hashemi ,  Shadi Abu-Surra ,  Gang Xu

IPC: H01Q15/14

Abstract: A multi-layer reconfigurable reflective intelligent surface (RIS). The RIS includes a unit-cell of a reconfigurable intelligent surface. The unit-cell includes a first layer composed of a conductive material and structured according to a sub-wavelength reflective pattern. The first layer reflects an impinging wave at a predetermined phase and steers the reflected impinging wave toward an intended receiver. The unit-cell includes a second layer composed of a first dielectric substrate material. Between the first and second layers, the unit-cell includes a middle layer composed of a second dielectric material having tunable dielectric properties. Tuning a dielectric constant of the second dielectric material modifies the predetermined phase of reflection of the impinging wave.

公开(公告)号：US20220038142A1

公开(公告)日：2022-02-03

申请号：US17368693

申请日：2021-07-06

Applicant: Samsung Electronics Co., Ltd.

Inventor： Shadi Abu-Surra ,  Won Suk Choi ,  Gang Xu

IPC: H04B7/0413 ,  H04L27/01 ,  H01Q3/38

Abstract: An end-to-end digital beamforming system includes a transmitter configured to transmit data and a receive configured to receive the data. Each of the transmitter and receiver includes a transceiver configured to communicate via a wired or wireless communication medium. Each of the transmitter and receiver also includes a processor and a base-tile antenna array comprising a plurality of antenna tiles. Each of the antenna tiles includes a radio frequency integrated circuit (RFIC) and an antenna-array-in-package comprising a plurality of antenna elements. The antenna tiles are disposed a different rotations such that a first antenna tile is disposed to transmit a first signal at a first polarization and a second antenna tile is disposed to transmit a second signal at a second polarization. Additionally, each of the antenna tiles transmits a part of a bandwidth.

公开(公告)号：US09806926B2

公开(公告)日：2017-10-31

申请号：US14526284

申请日：2014-10-28

Applicant: Samsung Electronics Co., Ltd.

Inventor： Gang Xu ,  Young Han Nam ,  Yang Li ,  Yan Xin ,  Jianzhong Zhang

IPC: H04L27/26 ,  H04B7/0452 ,  H04B7/06 ,  H04L5/00

CPC classification number: H04L27/2607 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0639 ,  H04L5/005 ,  H04L5/0051 ,  H04L27/2634 ,  H04L27/2647

Abstract: A multistage beamforming circuit includes a data unit that implements a frequency domain beamforming stage and a remote radio head that implements a time-domain broadband beamforming stage. The data unit implements the frequency domain beamforming stage by converting K received data streams into M precoding output streams in a frequency-domain. The data unit is configured to transform the M output streams to M OFDM time-domain signals. The remote radio head, or integrated radio unit is configured to implement a time-domain broadband beamforming stage by converting the M OFDM time-domain signals into N transmit streams of time-domain samples. The remote radio head, or integrated radio unit includes a transmit antenna array configured to transmit the N transmit streams that together form broadcast beams and user-specific beams. The antenna array includes a plurality of physical antennas. The number N of transmit streams is greater than the number M of precoding output streams.

公开(公告)号：US20150124688A1

公开(公告)日：2015-05-07

申请号：US14526284

申请日：2014-10-28

Applicant: Samsung Electronics Co., Ltd.

Inventor： Gang Xu ,  Young Han Nam ,  Yang Li ,  Yan Xin ,  Jianzhong Zhang

IPC: H04L5/00 ,  H04W72/00 ,  H04L27/26 ,  H04B7/04

CPC classification number: H04L27/2607 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0639 ,  H04L5/005 ,  H04L5/0051 ,  H04L27/2634 ,  H04L27/2647

Abstract: A multistage beamforming circuit includes a data unit that implements a frequency domain beamforming stage and a remote radio head that implements a time-domain broadband beamforming stage. The data unit implements the frequency domain beamforming stage by converting K received data streams into M precoding output streams in a frequency-domain. The data unit is configured to transform the M output streams to M OFDM time-domain signals. The remote radio head, or integrated radio unit is configured to implement a time-domain broadband beamforming stage by converting the M OFDM time-domain signals into N transmit streams of time-domain samples. The remote radio head, or integrated radio unit includes a transmit antenna array configured to transmit the N transmit streams that together form broadcast beams and user-specific beams. The antenna array includes a plurality of physical antennas. The number N of transmit streams is greater than the number M of precoding output streams.

Abstract translation: 多级波束成形电路包括实现频域波束形成级的数据单元和实现时域宽带波束形成级的远程无线电头。 数据单元通过将K个接收到的数据流转换成频域中的M个预编码输出流来实现频域波束成形阶段。 数据单元被配置为将M个输出流转换为M个OFDM时域信号。 远程无线电头或集成无线电单元被配置为通过将M个OFDM时域信号转换成N个时域样本的发送流来实现时域宽带波束成形阶段。 远程无线电头或集成无线电单元包括被配置为发送一起形成广播波束和用户专用波束的N个发射流的发射天线阵列。 天线阵列包括多个物理天线。 发送流的数量N大于预编码输出流的数量M.