公开(公告)号：US11777565B2

公开(公告)日：2023-10-03

申请号：US17385875

申请日：2021-07-26

Applicant: Texas Instruments Incorporated

Inventor： Eko Onggosanusi ,  Vikram Chandrasekhar ,  Runhua Chen

IPC: H04B7/0456 ,  H04B7/024 ,  H04B7/06 ,  H04W72/23 ,  H04B7/0452 ,  H04B7/0413 ,  H04B7/10

CPC classification number: H04B7/0469 ,  H04B7/024 ,  H04B7/0452 ,  H04B7/0691 ,  H04W72/23 ,  H04B7/0413 ,  H04B7/0665 ,  H04B7/10

Abstract: A base station selects a subset of at least one geographically separated antennas for each of the plurality of user equipments. The base station forms at least layer of data stream including modulated symbols, precodes the data stream via multiplication with the NT-by-N precoding matrix where N is the number of said layers and NT is the number of transmit antenna elements and transmits the precoded layers of data stream to the user equipment via the selected geographically separated antennas. The base station signals the subset of the plurality of geographically separated antennas via higher layer Radio Resource Control or via a down link grant mechanism. The base station optionally does not signal the subset of the plurality of geographically separated antennas to the corresponding mobile user equipment.

公开(公告)号：US20230163818A1

公开(公告)日：2023-05-25

申请号：US18100466

申请日：2023-01-23

Applicant: Texas Instruments Incorporated

Inventor： Eko Onggosanusi ,  Runhua Chen ,  Ralf Bendlin

IPC: H04B7/0456 ,  H04B7/06 ,  H04B7/0417

CPC classification number: H04B7/0456 ,  H04B7/0478 ,  H04B7/0486 ,  H04B7/0639 ,  H04B7/0469 ,  H04B7/0626 ,  H04B7/0417 ,  H04B7/046

Abstract: Channel state information (CSI) feedback in a wireless communication system is disclosed. A precoding matrix is generated for multi-antenna transmission based on precoding matrix indicator (PMI) feedback, wherein the PMI indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first codebook and a second codebook. In one embodiment, the first codebook comprises at least a first precoding matrix constructed with a first group of adjacent Discrete-Fourier-Transform (DFT) vectors. In another embodiment, the first codebook comprises at least a second precoding matrix constructed with a second group of uniformly distributed non-adjacent DFT vectors. In yet another embodiment, the first codebook comprises at least a first precoding matrix and a second precoding matrix, where said first precoding matrix is constructed with a first group of adjacent DFT vectors, and said second precoding matrix is constructed with a second group of uniformly distributed non-adjacent DFT vectors.

公开(公告)号：US10361760B2

公开(公告)日：2019-07-23

申请号：US15698015

申请日：2017-09-07

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Eko Onggosanusi ,  Runhua Chen ,  Ralf Bendlin

IPC: H04B7/04 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/0417

Abstract: Channel state information (CSI) feedback in a wireless communication system is disclosed. A precoding matrix is generated for multi-antenna transmission based on precoding matrix indicator (PMI) feedback, wherein the PMI indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first codebook and a second codebook. In one embodiment, the first codebook comprises at least a first precoding matrix constructed with a first group of adjacent Discrete-Fourier-Transform (DFT) vectors. In another embodiment, the first codebook comprises at least a second precoding matrix constructed with a second group of uniformly distributed non-adjacent DFT vectors. In yet another embodiment, the first codebook comprises at least a first precoding matrix and a second precoding matrix, where said first precoding matrix is constructed with a first group of adjacent DFT vectors, and said second precoding matrix is constructed with a second group of uniformly distributed non-adjacent DFT vectors.

公开(公告)号：US20160182133A1

公开(公告)日：2016-06-23

申请号：US15055195

申请日：2016-02-26

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Eko Onggosanusi ,  RUNHUA CHEN ,  RALF BENDLIN

IPC: H04B7/04 ,  H04B7/06

CPC classification number: H04B7/0456 ,  H04B7/0417 ,  H04B7/046 ,  H04B7/0469 ,  H04B7/0478 ,  H04B7/0486 ,  H04B7/0626 ,  H04B7/0639

Abstract: Channel state information (CSI) feedback in a wireless communication system is disclosed. A precoding matrix is generated for multi-antenna transmission based on precoding matrix indicator (PMI) feedback, wherein the PMI indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first codebook and a second codebook. In one embodiment, the first codebook comprises at least a first precoding matrix constructed with a first group of adjacent Discrete-Fourier-Transform (DFT) vectors. In another embodiment, the first codebook comprises at least a second precoding matrix constructed with a second group of uniformly distributed non-adjacent DFT vectors. In yet another embodiment, the first codebook comprises at least a first precoding matrix and a second precoding matrix, where said first precoding matrix is constructed with a first group of adjacent DFT vectors, and said second precoding matrix is constructed with a second group of uniformly distributed non-adjacent DFT vectors.

公开(公告)号：US09143212B2

公开(公告)日：2015-09-22

申请号：US14187216

申请日：2014-02-21

Applicant: Texas Instruments Incorporated

Inventor： Runhua Chen ,  Eko Onggosanusi ,  Ralf Bendlin

IPC: H04B7/02 ,  H04B7/04 ,  H04B7/06 ,  H04W36/00

CPC classification number: H04B7/0456 ,  H04B7/0417 ,  H04B7/0486 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/065 ,  H04L5/0057 ,  H04W36/0083 ,  H04W72/0413

Abstract: Channel state information (CSI) feedback in a wireless communication system is disclosed. User equipment transmits a CSI feedback signal via a Physical Uplink Control CHannel (PUCCH). If the UE is configured in a first feedback mode, the CSI comprises a first report jointly coding a Rank Indicator (RI) and a first precoding matrix indicator (PMI1), and a second report coding Channel Quality Indicator (CQI) and a second precoding matrix indicator (PMI2). If the UE is configured in a second feedback mode, the CSI comprises a first report coding RI, and a second report coding CQI, PMI1 and PMI2. The jointly coded RI and PMI1 employs codebook sub-sampling, and the jointly coding PMI1, PMI2 and CQI employs codebook sub-sampling.

Abstract translation: 公开了无线通信系统中的信道状态信息（CSI）反馈。 用户设备通过物理上行链路控制信道（PUCCH）发送CSI反馈信号。 如果UE以第一反馈模式配置，则CSI包括联合编码秩指示符（RI）和第一预编码矩阵指示符（PMI1）的第一报告和第二报告编码信道质量指示符（CQI）和第二预编码 矩阵指标（PMI2）。 如果UE被配置在第二反馈模式中，CSI包括第一报告编码RI和第二报告编码CQI，PMI1和PMI2。 共同编码的RI和PMI1采用码本子采样，联合编码PMI1，PMI2和CQI采用码本子采样。

公开(公告)号：US20220029671A1

公开(公告)日：2022-01-27

申请号：US17403587

申请日：2021-08-16

Applicant: Texas Instruments Incorporated

Inventor： Eko Onggosanusi ,  Runhua Chen ,  Ralf Bendlin

IPC: H04B7/0456 ,  H04B7/06 ,  H04B7/0417

Abstract: Channel state information (CSI) feedback in a wireless communication system is disclosed. A precoding matrix is generated for multi-antenna transmission based on precoding matrix indicator (PMI) feedback, wherein the PMI indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first codebook and a second codebook. In one embodiment, the first codebook comprises at least a first precoding matrix constructed with a first group of adjacent Discrete-Fourier-Transform (DFT) vectors. In another embodiment, the first codebook comprises at least a second precoding matrix constructed with a second group of uniformly distributed non-adjacent DFT vectors. In yet another embodiment, the first codebook comprises at least a first precoding matrix and a second precoding matrix, where said first precoding matrix is constructed with a first group of adjacent DFT vectors, and said second precoding matrix is constructed with a second group of uniformly distributed non-adjacent DFT vectors.

公开(公告)号：US20210359732A1

公开(公告)日：2021-11-18

申请号：US17385875

申请日：2021-07-26

Applicant: Texas Instruments Incorporated

Inventor： Eko Onggosanusi ,  Vikram Chandrasekhar ,  Runhua Chen

IPC: H04B7/0456 ,  H04B7/024 ,  H04B7/06 ,  H04B7/0452 ,  H04W72/12

Abstract: A base station selects a subset of at least one geographically separated antennas for each of the plurality of user equipments. The base station forms at least layer of data stream including modulated symbols, precodes the data stream via multiplication with the NT-by-N precoding matrix where N is the number of said layers and NT is the number of transmit antenna elements and transmits the precoded layers of data stream to the user equipment via the selected geographically separated antennas. The base station signals the subset of the plurality of geographically separated antennas via higher layer Radio Resource Control or via a down link grant mechanism. The base station optionally does not signal the subset of the plurality of geographically separated antennas to the corresponding mobile user equipment.

公开(公告)号：US11095346B2

公开(公告)日：2021-08-17

申请号：US16989587

申请日：2020-08-10

Applicant: Texas Instruments Incorporated

Inventor： Eko Onggosanusi ,  Runhua Chen ,  Ralf Bendlin

IPC: H04B7/04 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/0417

Abstract: Channel state information (CSI) feedback in a wireless communication system is disclosed. A precoding matrix is generated for multi-antenna transmission based on precoding matrix indicator (PMI) feedback, wherein the PMI indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first codebook and a second codebook. In one embodiment, the first codebook comprises at least a first precoding matrix constructed with a first group of adjacent Discrete-Fourier-Transform (DFT) vectors. In another embodiment, the first codebook comprises at least a second precoding matrix constructed with a second group of uniformly distributed non-adjacent DFT vectors. In yet another embodiment, the first codebook comprises at least a first precoding matrix and a second precoding matrix, where said first precoding matrix is constructed with a first group of adjacent DFT vectors, and said second precoding matrix is constructed with a second group of uniformly distributed non-adjacent DFT vectors.

公开(公告)号：US11075675B2

公开(公告)日：2021-07-27

申请号：US15955501

申请日：2018-04-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Eko Onggosanusi ,  Vikram Chandrasekhar ,  Runhua Chen

IPC: H04B7/0456 ,  H04B7/024 ,  H04B7/06 ,  H04B7/0452 ,  H04W72/12 ,  H04B7/0413 ,  H04B7/10

Abstract: A base station selects a subset of at least one geographically separated antennas for each of the plurality of user equipments. The base station forms at least layer of data stream including modulated symbols, precodes the data stream via multiplication with the NT-by-N precoding matrix where N is the number of said layers and NT is the number of transmit antenna elements and transmits the precoded layers of data stream to the user equipment via the selected geographically separated antennas. The base station signals the subset of the plurality of geographically separated antennas via higher layer Radio Resource Control or via a down link grant mechanism. The base station optionally does not signal the subset of the plurality of geographically separated antennas to the corresponding mobile user equipment.

公开(公告)号：US20160254848A1

公开(公告)日：2016-09-01

申请号：US15132024

申请日：2016-04-18

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Eko Onggosanusi ,  Runhua Chen ,  Ralf Bendlin

IPC: H04B7/04

CPC classification number: H04B7/0456 ,  H04B7/0417 ,  H04B7/046 ,  H04B7/0469 ,  H04B7/0478 ,  H04B7/0486 ,  H04B7/0626 ,  H04B7/0639

Abstract: Channel state information (CSI) feedback in a wireless communication system is disclosed. A precoding matrix is generated for multi-antenna transmission based on precoding matrix indicator (PMI) feedback, wherein the PMI indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first codebook and a second codebook. In one embodiment, the first codebook comprises at least a first precoding matrix constructed with a first group of adjacent Discrete-Fourier-Transform (DFT) vectors. In another embodiment, the first codebook comprises at least a second precoding matrix constructed with a second group of uniformly distributed non-adjacent DFT vectors. In yet another embodiment, the first codebook comprises at least a first precoding matrix and a second precoding matrix, where said first precoding matrix is constructed with a first group of adjacent DFT vectors, and said second precoding matrix is constructed with a second group of uniformly distributed non-adjacent DFT vectors.

Abstract translation: 公开了无线通信系统中的信道状态信息（CSI）反馈。 基于预编码矩阵指示符（PMI）反馈生成用于多天线传输的预编码矩阵，其中PMI指示从来自第一码本和第二码本的两个矩阵的矩阵乘法导出的预编码矩阵的选择。 在一个实施例中，第一码本至少包括由第一组相邻离散付里叶变换（DFT）矢量构成的第一预编码矩阵。 在另一个实施例中，第一码本包括至少第二预编码矩阵，其由第二组均匀分布的非相邻DFT向量构成。 在又一实施例中，第一码本至少包括第一预编码矩阵和第二预编码矩阵，其中所述第一预编码矩阵由第一组相邻DFT向量构成，并且所述第二预编码矩阵由第二组均匀 分布不相邻的DFT向量。