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    IEEE 802.11 ENHANCEMENTS FOR HIGH EFFICIENCY POSITIONING
    13.
    发明申请
    IEEE 802.11 ENHANCEMENTS FOR HIGH EFFICIENCY POSITIONING 有权
    IEEE 802.11高效率定位的增强

    公开(公告)号：US20160081054A1

    公开(公告)日：2016-03-17

    申请号：US14837775

    申请日：2015-08-27

    Applicant: QUALCOMM Incorporated

    Inventor： Xiaoxin Zhang ,  Ning Zhang ,  Carlos Horacio Aldana ,  Youhan Kim ,  Praveen Dua ,  Meghna Agrawal

    IPC: H04W64/00 ,  H04L5/00 ,  H04W52/02 ,  H04W24/10 ,  H04L12/841

    CPC classification number: H04W64/00 ,  H04L5/0055 ,  H04L47/283 ,  H04W24/00 ,  H04W52/0209 ,  H04W84/12 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/162 ,  Y02D70/22

    Abstract: A ranging operation between a first wireless device and a second wireless may be performed by: sending, to the second wireless device, a data frame including a request for the second wireless device to report its actual SIFS duration to the first wireless device; determining a time of departure (TOD) of the data frame; receiving, from the second wireless device, a response frame including SIFS information indicative of the actual SIFS duration of the second wireless device; determining a time of arrival (TOA) of the response frame; and determining a round trip time (RTT) of the data frame and the response frame using the TOD of the data frame, the TOA of the response frame, and the actual SIFS duration of the second wireless device.

    Abstract translation: 可以通过以下步骤来执行第一无线设备和第二无线设备之间的测距操作：向第二无线设备发送包括对第二无线设备向第一无线设备报告其实际SIFS持续时间的请求的数据帧; 确定数据帧的出发时间（TOD）; 从所述第二无线设备接收包括指示所述第二无线设备的实际SIFS持续时间的SIFS信息的响应帧; 确定响应帧的到达时间（TOA）; 以及使用数据帧的TOD，响应帧的TOA和第二无线设备的实际SIFS持续时间来确定数据帧和响应帧的往返时间（RTT）。

    METHOD OF ENABLING SINGLE CHAIN RANGING OPERATIONS
    14.
    发明申请
    METHOD OF ENABLING SINGLE CHAIN RANGING OPERATIONS 有权
    实现单链范围操作的方法

    公开(公告)号：US20150049679A1

    公开(公告)日：2015-02-19

    申请号：US13970382

    申请日：2013-08-19

    Applicant: QUALCOMM Incorporated

    Inventor： Sandip Homchaudhuri ,  Carlos Horacio Aldana ,  Xiaoxin Zhang ,  James Simon Cho

    IPC: H04W72/04

    CPC classification number: H04W64/00

    Abstract: A system and method are disclosed for performing ranging operations between two wireless devices without employing cyclic shift diversity (CSD) compensation techniques. For some embodiments, a first wireless device sends a negotiation request frame requesting the second wireless device to respond to subsequently received frames of a specified type using a selected one of the transmit chains in the second wireless device. Thereafter, the first wireless device sends a data frame to the second wireless device to initiate a ranging operation. The second wireless device sends a response frame of the specified type to the first wireless device using the selected one of the transmit chains.

    Abstract translation: 公开了一种在两个无线设备之间执行测距操作而不采用循环移位分集（CSD）补偿技术的系统和方法。 对于一些实施例，第一无线设备发送协商请求帧，请求第二无线设备使用第二无线设备中的所选发送链中的所选择的一个响应所接收的指定类型的帧。 此后，第一无线设备向第二无线设备发送数据帧以发起测距操作。 第二无线设备使用所选择的发送链之一向第一无线设备发送指定类型的响应帧。

    CYCLIC SHIFT DELAY DETECTION USING A CLASSIFIER
    15.
    发明申请
    CYCLIC SHIFT DELAY DETECTION USING A CLASSIFIER 有权
    使用分类器的循环移位延迟检测

    公开(公告)号：US20140153420A1

    公开(公告)日：2014-06-05

    申请号：US13759844

    申请日：2013-02-05

    Applicant: QUALCOMM INCORPORATED

    Inventor： Lionel Jacques Garin ,  Vinay Sridhara ,  Xiaoxin Zhang ,  Sundar Raman ,  Gengsheng Zhang ,  Bernal A. Arroyo ,  Carlos Horacio Aldana

    IPC: H04W24/00

    CPC classification number: H04W24/00 ,  H04B7/0671 ,  H04B7/0828 ,  H04B7/0874

    Abstract: Systems, apparatus and methods for determining a cyclic shift delay (CSD) mode from a plurality of CSD modes is disclosed. A received OFDM signal is converted to a channel impulse response (CIR) signal in the time domain and/or a channel frequency response (CFR) signal in the frequency domain. Matched filters and a comparator are used to determine a most likely current CSD mode. Alternatively, a classifier is used with a number of inputs including outputs from two or more matched filters and one or more outputs from a feature extractor. The feature extractor extracts features in the time domain from the CIR signal and/or in the frequency domain from the CFR signal useful in distinguishing various CSD modes.

    Abstract translation: 公开了用于从多个CSD模式确定循环移位延迟（CSD）模式的系统，装置和方法。 接收到的OFDM信号在时域中被转换为信道脉冲响应（CIR）信号和/或频域中的信道频率响应（CFR）信号。 匹配滤波器和比较器用于确定最可能的当前CSD模式。 或者，分类器使用多个输入，包括来自两个或多个匹配滤波器的输出和来自特征提取器的一个或多个输出。 特征提取器从CIR信号和/或频域中提取时域中的特征，来自用于区分各种CSD模式的CFR信号。

    METHOD AND APPARATUS FOR DETERMINING LOCATIONS OF ACCESS POINTS
    16.
    发明申请
    METHOD AND APPARATUS FOR DETERMINING LOCATIONS OF ACCESS POINTS 有权
    用于确定接入点位置的方法和装置

    公开(公告)号：US20130307723A1

    公开(公告)日：2013-11-21

    申请号：US13831403

    申请日：2013-03-14

    Applicant: QUALCOMM Incorporated

    Inventor： Lionel Jacques Garin ,  Xiaoxin Zhang

    IPC: H04W64/00 ,  G01S19/46

    CPC classification number: H04W64/003 ,  G01S5/021 ,  G01S5/0242 ,  G01S5/0252 ,  G01S5/0284 ,  G01S5/06 ,  G01S5/14 ,  G01S11/06 ,  G01S19/46

    Abstract: Methods, systems, computer-readable media, and apparatuses for determining locations of access points (AP) are presented. Techniques are described for determining relative and absolute locations of APs. In one embodiment, a device may send and receive messages to one or more APs for from various locations for determining the distance between the device and the AP. The device may additionally keep track of its own displacement for the purposes of determining the location of the one or more APs. In one embodiment, the device also determines the turnaround calibration factor (TCF) for the AP that compensates for the processing time at the AP may also be used for increasing the accuracy of the determination of the location of the AP.

    Abstract translation: 提出了用于确定接入点（AP）的位置的方法，系统，计算机可读介质和装置。 描述了确定AP的相对和绝对位置的技术。 在一个实施例中，设备可以从各个位置向一个或多个AP发送和接收消息，以确定设备和AP之间的距离。 为了确定一个或多个AP的位置，该装置还可以跟踪其自己的位移。 在一个实施例中，设备还确定补偿AP处理时间的AP的周转校准因子（TCF）也可以用于提高AP的位置的确定的准确性。

    Ultrawideband range accuracy
    17.
    发明授权
    Ultrawideband range accuracy 有权

    公开(公告)号：US12073671B2

    公开(公告)日：2024-08-27

    申请号：US17470061

    申请日：2021-09-09

    Applicant: QUALCOMM Incorporated

    Inventor： Xiaoxin Zhang ,  Le Nguyen Luong ,  Liang Zhao ,  Rishabh Raj ,  Ravindra Chauhan

    IPC: G07C9/00 ,  H04W76/16

    CPC classification number: G07C9/00309 ,  H04W76/16 ,  G07C2009/00357

    Abstract: Techniques are provided for improving ranging accuracy of ultrawideband (UWB) devices. An example method for obtaining a distance measurement with a wireless node includes obtaining a first distance measurement using a first radio link, determining a status of a second radio link in response to the first distance measurement being less than a threshold distance, configuring one or more transceiver parameters associated with the second radio link in response to determining the second radio link is utilizing a non-line of sight path, and obtaining a second distance measurement using the second radio link and the one or more transceiver parameters.

    Uplink multiple access sounding sequences
    18.
    发明授权
    Uplink multiple access sounding sequences 有权

    公开(公告)号：US11950286B2

    公开(公告)日：2024-04-02

    申请号：US17707772

    申请日：2022-03-29

    Applicant: QUALCOMM Incorporated

    Inventor： Alireza Raissinia ,  Xiaoxin Zhang ,  Stephen Jay Shellhammer

    IPC: H04W74/0816 ,  H04W72/044 ,  H04W72/121 ,  H04W74/06

    CPC classification number: H04W74/0816 ,  H04W72/044 ,  H04W72/121 ,  H04W74/06

    Abstract: Methods, systems, and devices for wireless communication are described. A first wireless communications device may transmit, to one or more second wireless communications devices, a first message that triggers transmission of a second message by each of the one or more second wireless communications devices, the first message allocating to each of the one or more second wireless communications devices a respective frequency-based resource unit for transmission of the second message, each of the respective frequency-based resource units spanning a portion of a channel bandwidth of a channel. The first wireless communications device may perform channel sensing measurements on the second message received from each of the one or more second wireless communications devices. The first wireless communications device may estimate the channel based on the channel sensing measurements performed on the respective second messages received on the respective frequency-based resource units.

    Generating indoor maps based on radio frequency sensing
    19.
    发明授权
    Generating indoor maps based on radio frequency sensing 有权

    公开(公告)号：US11885899B2

    公开(公告)日：2024-01-30

    申请号：US17315128

    申请日：2021-05-07

    Applicant: QUALCOMM Incorporated

    Inventor： Hadi Givehchian ,  Xiaoxin Zhang ,  Peyman Siyari

    IPC: G01S5/02 ,  H04W4/029

    CPC classification number: G01S5/02526 ,  G01S5/02527 ,  H04W4/029

    Abstract: Methods and systems for generating map information of an environment using channel state information (CSI) of wireless signals received by access points (APs) in the environment are disclosed. In some implementations, a system uses CSI of a wireless signal received by a respective AP to determine a time-of-flight (ToF) and an angle-of-arrival (AoA) of one or more reflected path signal components of the wireless signal, and estimates the locations of points or surfaces in an area of the respective AP based on the ToF and AoA of the reflected path signal components. The estimated locations of the points or surfaces can be used to generate map information for the area. The system aggregates map information generated for different areas of the environment to determine map information for the entire environment. The wireless signals may be received from wireless stations or user equipment, or may be received from the respective AP.

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