知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

374 records (took 0.036 seconds)

    TECHNIQUES FOR CHANNEL STATE INFORMATION ACQUISITION IN NEW RADIO TECHNOLOGY
    363.
    发明申请
    TECHNIQUES FOR CHANNEL STATE INFORMATION ACQUISITION IN NEW RADIO TECHNOLOGY 审中-公开

    公开(公告)号：US20190190581A1

    公开(公告)日：2019-06-20

    申请号：US16324710

    申请日：2017-08-11

    Applicant: QUALCOMM INCORPORATED

    Inventor： Yu ZHANG ,  Chao WEI ,  Jilei HOU

    IPC: H04B7/06 ,  H04L1/00

    CPC classification number: H04B7/0626 ,  H04B7/06 ,  H04B7/0641 ,  H04B7/0695 ,  H04L1/00 ,  H04L1/0026 ,  H04L1/0031 ,  H04L1/06

    Abstract: Certain aspects of the present disclosure provide techniques for channel state information acquisition in wireless communication systems operating according to new radio (NR) technologies. An exemplary method that may be performed by a user equipment (UE) generally includes receiving a first beamformed channel state information reference signal (CSI-RS), determining, based on the first beamformed CSI-RS and the beacon reference signal, information regarding an adjustment, preferred by the UE, of a beam-former to be used for a forthcoming second beamformed CSI-RS, transmitting a beamformer adjustment indicator (BAI), periodically, semi-persistently, or aperiodically, that indicates the preferred adjustment, and reporting channel state information feedback (CSF), based on the first beamformed CSI-RS.

    UE-RS-BASED OPEN-LOOP AND SEMI-OPEN-LOOP MIMO
    364.
    发明申请
    UE-RS-BASED OPEN-LOOP AND SEMI-OPEN-LOOP MIMO 审中-公开

    公开(公告)号：US20190089429A1

    公开(公告)日：2019-03-21

    申请号：US16078526

    申请日：2017-03-22

    Applicant: QUALCOMM Incorporated

    Inventor： Chao WEI ,  Wanshi CHEN ,  Peter GAAL ,  Hao XU ,  Neng WANG ,  Xiaohui LIU ,  Jilei HOU

    IPC: H04B7/0456 ,  H04L5/00 ,  H04B7/06 ,  H04L27/26

    Abstract: Design of precoding and feedback for user equipment (UE)-specific reference signals (UE-RS)-based open-loop and semi-open-loop multiple input, multiple output (MIMO) systems is discussed. Aspects of the present disclosure provide for sub-resource block (RB) random precoding that allows for greater diversity gain in a lower bandwidth. In addition, the recoding may be performed using resource element (RE)-level layer shifting that provides for a number of precoders to be assigned to a number of layers for every such continuous subcarrier. As such, two codewords may experience the same effective channel quality with channel quality indicators (CQI) being averaged across all of the layers.

    CSI FEEDBACK PROCESSING AND REPORTING FOR EB/FD-MIMO
    365.
    发明申请
    CSI FEEDBACK PROCESSING AND REPORTING FOR EB/FD-MIMO 审中-公开

    公开(公告)号：US20190081676A1

    公开(公告)日：2019-03-14

    申请号：US15765575

    申请日：2016-09-28

    Applicant: QUALCOMM Incorporated

    Inventor： Chao WEI ,  Yu ZHANG ,  Wanshi CHEN ,  Peter GAAL

    IPC: H04B7/06 ,  H04B7/0417 ,  H04B7/08 ,  H04L1/00

    Abstract: Channel state information (CSI) operations are disclosed with regard to elevation beamforming (EB)/full dimension (FD) multiple input, multiple output (ED/FD-MIMO) operations. With CSI processing associated with multiple CSI-reference signal (CSI-RS) resources, ambiguities may arise in determining the CSI reporting type and rank. CSI reporting type may be determined using a last reported beam selection indicator (BI) or, in the absence of a BI, may be determined according to a predefined rule. When rank and BI are reported separately and rank is absent, user equipment may determine a default reference rank for CSI reporting based on either or both of previously reported rank or BI. When rank and BI are jointly reported, encoding schemes with fixed bitwidths determined based on either CSI-RS processes or resources may be used to enhance decoding. CSI-RS antenna ports, processes, or resources may also be used in determining application of CSI processing relaxation.

    CHANNEL COVARIANCE FEEDBACK FOR ENHANCED FD-MIMO
    366.
    发明申请
    CHANNEL COVARIANCE FEEDBACK FOR ENHANCED FD-MIMO 审中-公开

    公开(公告)号：US20190058560A1

    公开(公告)日：2019-02-21

    申请号：US16078434

    申请日：2017-02-17

    Applicant: Bo CHEN ,  Chao WEI ,  Liangming WU ,  Neng WANG ,  QUALCOMM Incorporated

    Inventor： Bo CHEN ,  Chao WEI ,  Liangming WU ,  Neng WANG

    IPC: H04L5/00 ,  H04W24/08 ,  H04B7/0413 ,  H04W24/10

    Abstract: Channel covariance feedback is disclosed for enhanced full-dimension multiple input, multiple output (eFD-MIMO) systems. Channel state information (CSI) reference signal (CSI-RS) feedback operations are implemented using spatial covariance feedback of a covariance estimate. After obtaining a set of orthogonal basis vectors, a user equipment (UE) measures the CSI-RS from a base station and determines the spatial covariance matrix from the signal. The UE may then compress the spatial covariance matrix into a lower-dimension covariance estimate matrix using the orthogonal basis vectors. The lower-dimension matrix along with element-wise quantization allows for feedback of spatial covariance for eFD-MIMO systems without excessive feedback overhead.

    ENHANCED CSI FEEDBACK FOR FD-MIMO
    367.
    发明申请
    ENHANCED CSI FEEDBACK FOR FD-MIMO 审中-公开

    公开(公告)号：US20180351621A1

    公开(公告)日：2018-12-06

    申请号：US15780451

    申请日：2016-01-07

    Applicant: Chao WEI ,  Wanshi CHEN ,  Peter GAAL ,  Yu ZHANG ,  QUALCOMM Incorporated

    Inventor： Chao WEI ,  Wanshi CHEN ,  Peter GAAL ,  Yu ZHANG

    IPC: H04B7/06 ,  H04B7/0456 ,  H04L5/00 ,  H04W24/10

    CPC classification number: H04L5/0057 ,  H04B7/0478 ,  H04B7/06 ,  H04B7/0639 ,  H04L5/0023 ,  H04W72/082

    Abstract: Enhanced channel state information (CSI) feedback is disclosed for full dimensional multiple input, multiple output (FD-MIMO) operations. In one aspect, a CSI process is defined that may be used to identify an azimuth and elevation CSI-reference signal (RS) ports. A user equipment (UE) will send a precoding matrix indictor (PMI) report including a precoding matrix indicator (PMI) for the azimuth ports and a PMI for the elevation ports. One of the PMIs is assigned a low rank. The base station will use the two PMIs to create a whole channel precoding matrix. In another aspect, a single CSI process is configured having a plurality of CSI-RS resources. The UE generates channel measurement information for each of the CSI-RS resources, but only sets a CSI report to the base station of a subset of the total number of resources.

    TECHNIQUES FOR FLEXIBLE DUPLEXING
    368.
    发明申请
    TECHNIQUES FOR FLEXIBLE DUPLEXING 审中-公开

    公开(公告)号：US20180192400A1

    公开(公告)日：2018-07-05

    申请号：US15738990

    申请日：2016-07-01

    Applicant: QUALCOMM Incorporated

    Inventor： Chao WEI ,  Wanshi CHEN ,  Peter GAAL ,  Jilei HOU

    IPC: H04W72/04 ,  H04W28/04 ,  H04W72/14 ,  H04W72/12

    CPC classification number: H04W72/042 ,  H04J2211/005 ,  H04L1/1812 ,  H04W28/04 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/1268 ,  H04W72/14

    Abstract: The present disclosure, for example, generally relates to wireless communication systems, and more particularly to techniques for flexible duplexing in such systems. For example, a technique for flexible duplexing provides a reference configuration that determines characteristics for paired frequency division duplexing (FDD) bands when the uplink band is temporarily reconfigured for time division duplexing (TDD) use. A user equipment (UE) may use the reference configuration to determine hybrid automatic repeat request (HARQ) timing, schedule uplink transmissions, manage a soft buffer, and determine signaling formats. In an aspect, the UE may receive a reconfiguration message indicating a change for an FDD uplink band to a temporary TDD band. The UE may then determine a reference configuration for a pair of FDD bands including an FDD downlink band and the temporary TDD band, the reference configuration indicating a pattern of sub-frames associated with the pair of FDD bands.

Patent Agency Ranking