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    UNICAST AND BROADCAST PROTOCOL FOR WIRELESS LOCAL AREA NETWORK RANGING AND DIRECTION FINDING
    1.
    发明申请
    UNICAST AND BROADCAST PROTOCOL FOR WIRELESS LOCAL AREA NETWORK RANGING AND DIRECTION FINDING 审中-公开
    用于无线局域网范围和方向查找的单播和广播协议

    公开(公告)号：WO2017146862A1

    公开(公告)日：2017-08-31

    申请号：PCT/US2017/015155

    申请日：2017-01-26

    Applicant: QUALCOMM INCORPORATED

    Inventor： ALDANA, Carlos, Horacio ,  SMITH, Jeff ,  ZHANG, Xiaoxin ,  LIN, Chia-Hui ,  LEE, Yen-Feng ,  GIDVANI, Ravi ,  EITAN, Alecsander ,  MALIK, Rahul

    IPC: H04W4/02 ,  H04W64/00 ,  H04L5/00 ,  H04B7/06 ,  H04W28/16

    CPC classification number: G01S5/02 ,  G01S3/023 ,  G01S5/00 ,  G01S5/12 ,  G01S13/765 ,  H04B7/0617 ,  H04B7/0643 ,  H04B7/0695 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0092 ,  H04L27/26 ,  H04L27/2601 ,  H04W4/02 ,  H04W64/00 ,  H04W76/14

    Abstract: Disclosed embodiments facilitate wireless channel calibration, ranging, and direction finding, between networked devices. A method on a first station (STA) may comprise: broadcasting, at a first time, a first NDPA frame to a plurality of second STAs. The first NDPA frame may include a first bit indicating that one or more subsequent frames comprise ranging or angular information. After a Short Interval Frame Space (SIFS) time interval from the first time, a second frame may be broadcast. The second frame may be a Null Data Packet (NDP) frame. In response, a plurality of Compressed Beamforming (CBF) frames may be received at the first STA where each CBF frame may be received from a distinct corresponding second STA, and may include Channel Feedback Information field with information pertaining to communication channel between the first STA and the corresponding second STA. The communications may be encoded using Orthogonal Frequency Division Multiple Access.

    Abstract translation: 所公开的实施例有助于联网设备之间的无线信道校准，测距和方向查找。 第一站（STA）上的方法可以包括：在第一时间向多个第二STA广播第一NDPA帧。 第一NDPA帧可以包括指示一个或多个后续帧包括测距或角度信息的第一比特。 在从第一次开始的短间隔帧间隔（SIFS）时间间隔之后，可以广播第二帧。 第二帧可以是空数据分组（NDP）帧。 作为响应，可以在第一STA处接收多个压缩波束成形（CBF）帧，其中可以从不同的对应第二STA接收每个CBF帧，并且可以包括具有关于第一STA之间的通信信道的信息的信道反馈信息字段 和相应的第二STA。 通信可以使用正交频分多址进行编码。

    NULL-SPACE-PROJECTION-BASED CHANNEL DECOMPOSTION FOR BEAMFORMING
    2.
    发明申请
    NULL-SPACE-PROJECTION-BASED CHANNEL DECOMPOSTION FOR BEAMFORMING 审中-公开

    公开(公告)号：WO2020176413A1

    公开(公告)日：2020-09-03

    申请号：PCT/US2020/019501

    申请日：2020-02-24

    Applicant: QUALCOMM INCORPORATED

    Inventor： MANDULA, Yashwanth ,  VEMULA, Gopala Krishna Murthy ,  CHANDRASEKARAN, Suresh ,  GORE, Ashutosh Deepak ,  VENKATESH, Swaroop ,  JALLOUL, Louay ,  MOHAMMED, Ahmad Abdulrahman ,  LEE, Yen-Feng ,  PAYSARVI HOSEINI, Pedram ,  SU, Chi-Lin ,  KIM, Youhan

    IPC: H04B7/0456

    Abstract: This disclosure provides methods, devices and systems for obtaining and providing channel feedback. In some implementations, a beamformee provides channel feedback to a beamformer that enables the beamformer to construct and independently precode two or more different sets of spatial streams for transmission to the beamformee. The independent precoding of the different sets of spatial streams ensures that the decodings of the different sets of spatial streams may be decoupled from one another at the beamformee. To provide the channel feedback, the beamformee partitions a channel estimate into two or more sub-estimates prior to performing a channel decomposition. In some implementations, the beamformee determines null-space-based projections of the sub-estimates before performing the channel decomposition. The determination of the null-space-based projections enables the beamformee to perform independent decompositions of the multiple channel sub-estimates to determine multiple respective feedback matrices, which are then assembled to provide the channel feedback to the beamformer. The channel feedback is then reconstructed and disassembled by the beamformer to perform the independent precoding of the different sets of spatial streams.

    PACKET EXTENSIONS FOR RANGING OPERATIONS
    3.
    发明申请
    PACKET EXTENSIONS FOR RANGING OPERATIONS 审中-公开
    分组扩展操作

    公开(公告)号：WO2017160809A1

    公开(公告)日：2017-09-21

    申请号：PCT/US2017/022266

    申请日：2017-03-14

    Applicant: QUALCOMM INCORPORATED

    Inventor： ZHANG, Ning ,  ZHANG, Xiaoxin ,  KIM, Youhan ,  ALDANA, Carlos Horacio ,  KELLIHER, Patrick ,  LEE, Yen-Feng

    IPC: G01S5/14

    CPC classification number: G01S5/12 ,  G01S5/14 ,  G01S11/02 ,  G01S13/76 ,  H04W64/00

    Abstract: This disclosure provides systems, methods and apparatuses for performing ranging operations between wireless devices. In some implementations, wireless devices can exchange ranging packets that include packet extensions containing a plurality of long training fields (LTFs). The wireless devices can use the LTFs in the ranging packets to obtain a plurality of round-trip time (RTT) values based on a single exchange of ranging packets. The wireless devices also can use the LTFs to estimate angle of arrival (AoA) and angle of departure (AoD) information of the exchanged ranging packets.

    Abstract translation: 本公开提供了用于在无线设备之间执行测距操作的系统，方法和装置。 在一些实现中，无线设备可以交换包括包含多个长训练字段（LTF）的分组扩展的测距分组。 无线设备可以使用测距分组中的LTF来基于测距分组的单个交换获得多个往返时间（RTT）值。 无线设备还可以使用LTF来估计交换的测距分组的到达角（AoA）和出发角（AoD）信息。

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