公开(公告)号：US20210050972A1

公开(公告)日：2021-02-18

申请号：US16969320

申请日：2019-02-13

Applicant: Qualcomm incorporated

Inventor： Ruiming Zheng ,  Chenxi Hao ,  Yu Zhang

IPC: H04L5/00 ,  H04W72/08 ,  H04B7/06

Abstract: Techniques are described herein for activating and/or deactivating a semi-persistent configuration for one or more channel state information reference signal (CSI-RS) resource sets using a medium access control (MAC) control element (CE) and/or radio resource control (RRC) signaling. The MAC CE may include an indicator to indicate whether a semi-persistent configuration for a CSI resource set that includes one or more CSI resources is to be activated or deactivated. The MAC CE may also include identifiers for each of the CSI resource sets having the semi-persistent configuration activated or deactivated. In some cases, RRC messages may be used to communicate quasi-collocation (QCL) relationships associated with the CSI resources of the CSI resource sets. In some cases, the MAC CE may communicate at least some of or a portion of the information related to QCL relationships.

公开(公告)号：US10735070B2

公开(公告)日：2020-08-04

申请号：US15544370

申请日：2015-01-19

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Wanshi Chen ,  Peter Gaal ,  Yu Zhang

IPC: H04B7/06 ,  H04B7/0456 ,  H04L5/00 ,  H04W72/04 ,  H04W88/02

Abstract: Mechanisms for reduction of channel state information (CSI) feedback overhead are disclosed for full dimensional multiple input, multiple output (FD-MIMO) systems with large dimension antenna ports. In one aspect, rank-dependent CSI antenna port measurements are used in order to limit the number of antenna ports for high rank CSI reporting. Another aspect allows a user equipment (UE) to select subband feedback for aperiodic CSI porting on an uplink shared channel when the UE is to report subband quality and precoding indicators. Another aspect provides for on-demand CSI feedback that dynamically configures CSI feedback parameters. To reduce the signaling overhead, the multiple parameter sets may be pre-configured with different values for dynamic reporting parameters.

公开(公告)号：US20200052804A1

公开(公告)日：2020-02-13

申请号：US16491307

申请日：2017-08-11

Applicant: Chenxi HAO ,  Yu ZHANG ,  Chao WEI ,  Qualcomm Incorporated

Inventor： Chenxi Hao ,  Yu Zhang ,  Chao Wei

IPC: H04B17/364 ,  H04B17/24 ,  H04B17/318 ,  H04L5/00 ,  H04B7/06 ,  H04W72/04

Abstract: The described techniques relate to improved methods, systems, devices, or apparatuses that support communication schemes for small cyclic delay diversity (SCDD) reference signals. A base station may transmit a control message comprising at least one channel state information (CSI) configuration parameter to a user equipment (UE). The UE may identify a time offset between a plurality of virtual antennas of the base station based at least in part on the CSI configuration parameter. The UE may perform measurements of a plurality of CSI reference signals (CSI-RSs) transmitted by the base station and associated with the virtual antennas. The UE may transmit a feedback message based at least in part on the determined time offset and the measurements of the CSI-RSs.

公开(公告)号：US20200044704A1

公开(公告)日：2020-02-06

申请号：US16599018

申请日：2019-10-10

Applicant: QUALCOMM Incorporated

Inventor： Yu Zhang ,  Chao WEI ,  Peng CHENG ,  Neng WANG ,  Jilei HOU

IPC: H04B7/0456 ,  H04L1/00 ,  H04W16/10 ,  H04B7/0426 ,  H04L1/06 ,  H04L1/18 ,  H04B7/06 ,  H04B7/0452 ,  H04W16/28

Abstract: Certain aspects of the present disclosure provide methods and apparatus for linear precoding in full-dimensional MIMO (FD-MIMO) systems. According to aspects, an eNB may compress a larger number of antenna elements to a smaller number of antenna ports. The eNB may use a port precoding matrix to transmit reference signals to a UE, receive feedback regarding CSI based on the reference signals, and transmit data to the UE, based on a mapping of multiple data layers and mapping of antenna ports to the physical antenna elements. Further, aspects include performing elevation beamforming by dynamically forming one or more vertical sectors based on UE feedback in the elevation domain.

公开(公告)号：US20190379437A1

公开(公告)日：2019-12-12

申请号：US16476408

申请日：2018-02-05

Applicant: Se Yong PARK ,  Wei ZENG ,  Alexandros MANOLAKOS ,  Sony AKKARAKARAN ,  Yi HUANG ,  Renqiu WANG ,  Hao XU ,  Yu ZHANG ,  Joseph Binamira SORIAGA ,  Tingfang JI ,  Peter GAAL ,  Qualcomm Incorporated

Inventor： Se Yong Park ,  Wei Zeng ,  Alexandros Manolakos ,  Sony Akkarakaran ,  Yi Huang ,  Renqiu Wang ,  Hao Xu ,  Yu Zhang ,  Joseph Binamira Soriago ,  Tingfang Ji ,  Peter Gaal

IPC: H04B7/0456 ,  H04L27/26 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communication are described that support a low peak-to-average power ratio (PAPR) precoded reference signal design for multiple-input, multiple-output (MIMO) transmissions. A user equipment (UE) may identify multiple sets of symbols associated with different reference signal waveforms, where each reference signal waveform may be associated with a low PAPR. In some cases, different single-carrier reference signal waveforms may be mapped to subsets of frequency resources through frequency division multiplexing (FDM) for a transmission on a single antenna. However, the addition of single-carrier waveforms through FDM for a transmission via an antenna may result in an uplink transmission having a high PAPR (e.g., as compared to single-carrier waveforms). The UE may reduce the PAPR of the uplink transmission by multiplexing the reference signal waveforms in the time domain (e.g., using time division multiplexing (TDM)).

公开(公告)号：US10461824B2

公开(公告)日：2019-10-29

申请号：US14786854

申请日：2014-05-28

Applicant: QUALCOMM INCORPORATED

Inventor： Yu Zhang ,  Wei Chao ,  Peng Cheng ,  Neng Wang ,  Jilei Hou

IPC: H04B7/04 ,  H04B7/0456 ,  H04W16/10 ,  H04L1/00 ,  H04L1/06 ,  H04L1/18 ,  H04B7/0426 ,  H04B7/0452 ,  H04B7/06 ,  H04W16/28

Abstract: Certain aspects of the present disclosure provide methods and apparatus for linear precoding in full-dimensional MIMO (FD-MIMO) systems. According to aspects, an eNB may compress a larger number of antenna elements to a smaller number of antenna ports. The eNB may use a port precoding matrix to transmit reference signals to a UE, receive feedback regarding CSI based on the reference signals, and transmit data to the UE, based on a mapping of multiple data layers and mapping of antenna ports to the physical antenna elements. Further, aspects include performing elevation beamforming by dynamically forming one or more vertical sectors based on UE feedback in the elevation domain.

公开(公告)号：US10404340B2

公开(公告)日：2019-09-03

申请号：US15608670

申请日：2017-05-30

Applicant: QUALCOMM Incorporated

Inventor： Alexandros Manolakos ,  Yu Zhang ,  Jing Jiang ,  June Namgoong ,  Wanshi Chen ,  Tingfang Ji

IPC: H04B7/0456 ,  H04B7/0413 ,  H04L5/00

Abstract: Aspects of the disclosure relate to a transmitting device, which may explicitly or implicitly signal the use of continuous precoding for a resource block (RB) cluster. For example, the transmitting device may implicitly indicate that continuous precoding is applied to an RB cluster by dynamically controlling one or more parameters of a transmission over those RBs. Further, when continuous precoding is applied to an RB cluster, the transmitting device may explicitly or implicitly signal the dynamic control over one or more transmission properties, with an aim to maximize the benefits of such continuous precoding. Other aspects, embodiments, and features are also claimed and described.

公开(公告)号：US10404338B2

公开(公告)日：2019-09-03

申请号：US15563357

申请日：2015-06-03

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Yu Zhang ,  Wanshi Chen ,  Peter Gaal

IPC: H04B7/04 ,  H04B7/0456 ,  H04L1/00 ,  H04B7/06 ,  H04B7/0452

Abstract: Enhanced channel state information (CSI) procedures for full dimension-multiple input, multiple output (FD-MIMO) is discussed in which a number of CSI reference signal (CSI-RS) ports configured for a user equipment (UE) is determined. In response to the CSI-RS ports including both horizontal and vertical ports, the UE may determine a first precoding matrix from a plurality of precoding matrices constructed by a Kronecker product of a horizontal precoding matrix and a vertical precoding matrix. The UE selects a predetermined number of precoding vectors out of the first precoding matrix and generates a wideband precoding matrix, based on the selected predetermined number of precoding vectors. The UE reports one or more CSI reports, wherein the CSI re-ports includes at least one precoding matrix indicator (PMI) for the first precoding matrix and at least an indication of the selection of the predetermined number of precoding vectors.

公开(公告)号：US20160277081A1

公开(公告)日：2016-09-22

申请号：US15029498

申请日：2013-10-18

Applicant: QUALCOMM INCORPORATED

Inventor： Chao Wei ,  Yu Zhang ,  Jilei Hou

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

Abstract: In an aspect, a method of wireless communication includes transmitting first reference signals from a base station using a first set of antenna ports, and receiving first feedback information at the base station from a user equipment (UE). The first feedback information may be associated with the first reference signals. The method includes configuring a first precoder based on the first feedback information, and transmitting second reference signals to the UE based on the configuration of the first precoder. The method includes receiving second feedback information at the base station from the UE. The second feedback information may be associated with the second reference signals. The method includes configuring a second precoder based on the second feedback information.

Abstract translation: 一方面，一种无线通信方法包括使用第一组天线端口从基站发送第一参考信号，以及从用户设备（UE）在基站接收第一反馈信息。 第一反馈信息可以与第一参考信号相关联。 该方法包括基于第一反馈信息配置第一预编码器，并且基于第一预编码器的配置将第二参考信号发送给UE。 该方法包括在UE从基站接收第二反馈信息。 第二反馈信息可以与第二参考信号相关联。 该方法包括基于第二反馈信息配置第二预编码器。

公开(公告)号：US12295005B2

公开(公告)日：2025-05-06

申请号：US17758849

申请日：2020-02-06

Applicant: QUALCOMM INCORPORATED

Inventor： Seyedkianoush Hosseini ,  Yi Huang ,  Wei Yang ,  Yu Zhang ,  Wanshi Chen ,  Krishna Kiran Mukkavilli

IPC: H04W72/23 ,  H04W24/10 ,  H04W72/1263 ,  H04W72/566

Abstract: Methods, systems, and devices for wireless communications are described. A receiving device (such as user equipment (UE)) may receive a downlink grant including an indication to report channel state information. The receiving device may identify, based on the downlink grant, a number of channel state information processing units associated with reporting the channel state information, and may determine that an available number of channel state information processing units is less than the number of channel state information processing units. In some cases, the receiving device may allocate, based on the determining, a set of channel state information processing units including the available number of channel state information processing units and one or more additional channel state information processing units. The receiving device may then transmit the channel state information report based on the set of channel state information processing units.