公开(公告)号：US09319121B2

公开(公告)日：2016-04-19

申请号：US14863156

申请日：2015-09-23

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：US20250055515A1

公开(公告)日：2025-02-13

申请号：US18921300

申请日：2024-10-21

Applicant: Texas Instruments Incorporated

Inventor： Eko Onggosanusi ,  Runhua Chen ,  Ralf Bendlin

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

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：US20240195464A1

公开(公告)日：2024-06-13

申请号：US18393965

申请日：2023-12-22

Applicant: Texas Instruments Incorporated

Inventor： Runhua Chen ,  Eko Onggosanusi ,  Ralf M. Bendlin

IPC: H04B7/0456 ,  H04B7/0417 ,  H04B7/06 ,  H04L5/00 ,  H04W36/00 ,  H04W72/21

CPC classification number: H04B7/0456 ,  H04B7/0486 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/065 ,  H04L5/0057 ,  H04W72/21 ,  H04B7/0417 ,  H04W36/0083

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.

公开(公告)号：US20240022295A1

公开(公告)日：2024-01-18

申请号：US18373640

申请日：2023-09-27

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Eko Onggosanusi ,  Vikram Chandrasekhar ,  Runhua Chen

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

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

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：US20220021424A1

公开(公告)日：2022-01-20

申请号：US17388935

申请日：2021-07-29

Applicant: Texas Instruments Incorporated

Inventor： Runhua Chen ,  Eko Onggosanusi ,  Ralf M. Bendlin

IPC: H04B7/0456 ,  H04B7/06 ,  H04L5/00 ,  H04W72/04

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.

公开(公告)号：US11088740B2

公开(公告)日：2021-08-10

申请号：US15955513

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：US20200373978A1

公开(公告)日：2020-11-26

申请号：US16989587

申请日：2020-08-10

Applicant: Texas Instruments Incorporated

Inventor： Eko Onggosanusi ,  Runhua Chen ,  Ralf Bendlin

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

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：US20200304181A1

公开(公告)日：2020-09-24

申请号：US16716210

申请日：2019-12-16

Applicant: Texas Instruments Incorporated

Inventor： Runhua Chen ,  Eko Onggosanusi ,  Ralf M. Bendlin

IPC: H04B7/0456 ,  H04B7/06 ,  H04L5/00 ,  H04W72/04

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.

公开(公告)号：US20180234146A1

公开(公告)日：2018-08-16

申请号：US15955513

申请日：2018-04-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Eko Onggosanusi ,  Vikram Chandrasekhar ,  Runhua Chen

IPC: H04B7/04 ,  H04W72/12 ,  H04B7/0452 ,  H04B7/06 ,  H04B7/024 ,  H04B7/0413 ,  H04B7/10

CPC classification number: H04B7/0469 ,  H04B7/024 ,  H04B7/0413 ,  H04B7/0452 ,  H04B7/0665 ,  H04B7/0691 ,  H04B7/10 ,  H04W72/1294

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：US20180234145A1

公开(公告)日：2018-08-16

申请号：US15955501

申请日：2018-04-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Eko Onggosanusi ,  Vikram Chandrasekhar ,  Runhua Chen

IPC: H04B7/04 ,  H04W72/12 ,  H04B7/0452 ,  H04B7/06 ,  H04B7/024 ,  H04B7/0413 ,  H04B7/10

CPC classification number: H04B7/0469 ,  H04B7/024 ,  H04B7/0413 ,  H04B7/0452 ,  H04B7/0665 ,  H04B7/0691 ,  H04B7/10 ,  H04W72/1294

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.