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：US20240154650A1

公开(公告)日：2024-05-09

申请号：US18402204

申请日：2024-01-02

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Sebastian Faxér ,  Shiwei Gao ,  Robert Mark Harrison ,  Siva Muruganathan

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

CPC classification number: H04B7/0417 ,  H04B7/0478 ,  H04B7/0486 ,  H04B7/0626 ,  H04B7/0639 ,  H04B7/065 ,  H04B7/0658

Abstract: Systems and methods for multi-beam Channel State Information (CSI) reporting are provided. In some embodiments, a method of operation of a second node connected to a first node in a wireless communication network for reporting multi-beam CSI includes reporting a rank indicator and a beam count indicator in a first transmission to the first node. The method also includes reporting a cophasing indicator in a second transmission to the first node. The cophasing indicator identifies a selected entry of a codebook of cophasing coefficients where the number of bits in the cophasing indicator is identified by at least one of the beam count indicator and the rank indicator. In this way, feedback for both a rank indicator and a beam count indicator may be possible which may allow robust feedback and variably sized cophasing and beam index indicators.

公开(公告)号：US11863251B2

公开(公告)日：2024-01-02

申请号：US17882120

申请日：2022-08-05

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Sebastian Faxér ,  Shiwei Gao ,  Robert Mark Harrison ,  Siva Muruganathan

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

CPC classification number: H04B7/0417 ,  H04B7/0478 ,  H04B7/0486 ,  H04B7/065 ,  H04B7/0626 ,  H04B7/0639 ,  H04B7/0658

Abstract: Systems and methods for multi-beam Channel State Information (CSI) reporting are provided. In some embodiments, a method of operation of a second node connected to a first node in a wireless communication network for reporting multi-beam CSI includes reporting a rank indicator and a beam count indicator in a first transmission to the first node. The method also includes reporting a cophasing indicator in a second transmission to the first node. The cophasing indicator identifies a selected entry of a codebook of cophasing coefficients where the number of bits in the cophasing indicator is identified by at least one of the beam count indicator and the rank indicator. In this way, feedback for both a rank indicator and a beam count indicator may be possible which may allow robust feedback and variably sized cophasing and beam index indicators.

公开(公告)号：US11777582B2

公开(公告)日：2023-10-03

申请号：US17596541

申请日：2020-06-19

Applicant: QUALCOMM Incorporated

Inventor： Chenxi Hao ,  Yu Zhang ,  Chao Wei ,  Wanshi Chen ,  Liangming Wu

IPC: H04B7/06

CPC classification number: H04B7/065 ,  H04B7/0626

Abstract: Certain aspects of the present disclosure provide techniques for channel state information (CSI) reporting with frequency domain (FD) compression. More particularly, aspects of the present disclosure provide for codebook subset restriction (CBSR) on per spatial domain (SD) basis amplitude.

公开(公告)号：US20190245595A1

公开(公告)日：2019-08-08

申请号：US16314661

申请日：2017-07-21

Applicant: Sony Corporation

Inventor： Jin XU ,  Cheng GAO ,  Siqi LIU ,  Chaonan HE ,  Jianfei CAO

IPC: H04B7/0456 ,  H04W24/08

CPC classification number: H04B7/0456 ,  H04B7/04 ,  H04B7/0478 ,  H04B7/063 ,  H04B7/0639 ,  H04B7/0647 ,  H04B7/065 ,  H04B7/0695 ,  H04W24/08

Abstract: An electronic device at a base station end includes a processing circuit, the processing circuit being configured to: configure, in response to request signalling from a user equipment, an aperiodic beam-forming reference signal relevant to a first beam group for the user equipment, wherein the first beam group is determined by a base station according to channel state information periodically fed back by the user equipment; generate downlink control information, so as to indicate that the user equipment feeds back beam selection information according to the aperiodic beam-forming reference signal; determine, according to the beam selection information, one or a plurality of candidate beams and one or a plurality of corresponding second pre-coding codebooks; and determine an effective pre-coding codebook based on the one or multiple second pre-coding codebooks.

公开(公告)号：US20180375554A1

公开(公告)日：2018-12-27

申请号：US15572864

申请日：2017-09-29

Applicant: Telefonaktiebolaget LM Ericsson (Publ)

Inventor： Sebastian FAXÉR ,  Niklas WERNERSSON

IPC: H04B7/0456 ,  H04W52/36

CPC classification number: H04B7/0478 ,  H04B7/065 ,  H04W52/36

Abstract: A method of determining a precoder from a first codebook, where said precoder determination comprises measuring on a set of beamformed antenna ports, and where the precoders in the first codebook share one or more common components with precoders in a second, multi-beam, codebook and where determining precoders from the second codebook comprises measuring on a larger set of, typically non-precoded, antenna ports.

公开(公告)号：US20180337717A1

公开(公告)日：2018-11-22

申请号：US16040872

申请日：2018-07-20

Applicant: Huawei Technologies Co., Ltd.

Inventor： Majid NASIRI KHORMUJI ,  Renaud-Alexandre PITAVAL

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

CPC classification number: H04B7/0417 ,  H04B7/0421 ,  H04B7/061 ,  H04B7/0619 ,  H04B7/063 ,  H04B7/0639 ,  H04B7/065 ,  H04B7/0673

Abstract: The disclosure relates to a first communication device for a wireless communication system, the first communication device comprising: a processor, a cascade precoder including an outer precoder and an inner precoder, and a transceiver; wherein the processor is configured to determine the inner precoder; wherein the transceiver is configured to transmit a first pilot sequence to a second communication device; wherein the transceiver is configured to receive a first channel estimation from the second communication device; wherein the processor is configured to determine the outer precoder based on the first channel estimation; wherein the transceiver is configured to transmit at least one of a data sequence and a pilot sequence to the second communication device.

公开(公告)号：US20180331733A1

公开(公告)日：2018-11-15

申请号：US15972716

申请日：2018-05-07

Applicant: Sony Corporation

Inventor： Hiroaki TAKANO

IPC: H04B7/0452 ,  H04L5/00

CPC classification number: H04B7/0452 ,  H04B7/0421 ,  H04B7/0619 ,  H04B7/0626 ,  H04B7/065 ,  H04B7/0689 ,  H04L5/0048 ,  H04L5/005 ,  H04L25/03898 ,  H04W24/10 ,  H04W72/04 ,  H04W72/0453 ,  H04W72/046

Abstract: An electronic device including circuitry configured to control receiving a first reference signal or a second reference signal. The second reference signal is weighted. The circuitry is configured to determine first transmission weight information and second transmission weight information based on reception of the first reference signal or the second reference signal. The circuitry is further configured to control transmitting of the first transmission weight information according to a first period and the second transmission weight information according to a second period, the first period being different from the second period. The second transmission weight information is determined and transmitted after the first transmission weight information is transmitted.

公开(公告)号：US10084514B2

公开(公告)日：2018-09-25

申请号：US14797795

申请日：2015-07-13

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jin-Kyu Han ,  Hwan-Joon Kwon ,  Dong-Hee Kim ,  Jae-Chon Yu ,  Yeon-Ju Lim

IPC: H04L27/00 ,  H04B7/0417 ,  H04L27/26 ,  H04W72/04 ,  H04L1/00 ,  H04B7/06 ,  H04B7/0452 ,  H04L25/02 ,  H04L25/03

CPC classification number: H04B7/0417 ,  H04B7/0452 ,  H04B7/0632 ,  H04B7/0641 ,  H04B7/065 ,  H04L1/0026 ,  H04L1/0039 ,  H04L1/004 ,  H04L25/0204 ,  H04L25/0222 ,  H04L25/0228 ,  H04L27/2646 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802 ,  H04W72/0406

Abstract: Methods and apparatuses are provided for transmitting feedback information in a communication system supporting multiple transmission methods with multi antenna transmission. Information for a default Multiple Input Multiple Output (MIMO) mode is received. It is determined whether the default MIMO mode is a Single-User MIMO mode or a Multi-User MIMO mode based on the information for the default MIMO mode. First Channel Quality Indicator (CQI) feedback information is calculated for one of the Single-User MIMO mode and the Multi-User MIMO mode determined as the default MIMO mode. The first CQI feedback information and DELTA CQI feedback information, which is a differential value between the first CQI feedback information and second CQI feedback information for a non-default MIMO mode, are transmitted.

公开(公告)号：US10021585B2

公开(公告)日：2018-07-10

申请号：US15031654

申请日：2014-11-07

Applicant: LG ELECTRONICS INC.

Inventor： Youngtae Kim ,  Kijun Kim ,  Hyungtae Kim ,  Jonghyun Park

IPC: H04W24/10 ,  H04B17/24 ,  H04B17/309 ,  H04W4/06 ,  H04W24/08 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/06

CPC classification number: H04W24/10 ,  H04B7/0452 ,  H04B7/0478 ,  H04B7/065 ,  H04B17/24 ,  H04B17/309 ,  H04W4/06 ,  H04W24/08

Abstract: The present invention relates to a method and an apparatus for performing, by a terminal having multiple antennas, measurement reporting in a wireless communication system. In particular, the method comprises the steps of: receiving a multicast-broadcast single-frequency network (MBSFN) reference signal; performing a measurement for radio resource management for each of the multiple antennas, using the MBSFN reference signal; and reporting the result of the measurement, wherein the result of the measurement is determined on the basis of the measurement values of all diversity branches corresponding to the multiple antennas.