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    SATELLITE POSITIONING SYSTEM NAVIGATION BIT AIDING
    1.
    发明申请
    SATELLITE POSITIONING SYSTEM NAVIGATION BIT AIDING 审中-公开

    公开(公告)号：WO2020096698A3

    公开(公告)日：2020-05-14

    申请号：PCT/US2019/051856

    申请日：2019-09-19

    Applicant: QUALCOMM INCORPORATED

    Inventor： COOKMAN, Jordan ,  WU, Jie ,  PON, Rayman ,  OPSHAUG, Guttorm Ringstad ,  ZHANG, Gengsheng

    IPC: G01S19/24 ,  G01S19/25 ,  G01S19/30

    Abstract: A method of processing a satellite signal includes: receiving a satellite positioning system (SPS) signal, including an SPS data signal of unknown data content, from a satellite at a wireless communication device; receiving symbol indications, of determined symbol values, from a terrestrial wireless communication system at the wireless communication device; correlating the SPS data signal with a pseudo-random noise code to obtain first correlation results; and using the symbol indications and the first correlation results to determine a measurement of the SPS signal.

    ORTHOGONALITY AND ENCAPSULATION FOR POSITIONING AND NAVIGATION SIGNALS
    3.
    发明申请
    ORTHOGONALITY AND ENCAPSULATION FOR POSITIONING AND NAVIGATION SIGNALS 审中-公开

    公开(公告)号：WO2019199396A1

    公开(公告)日：2019-10-17

    申请号：PCT/US2019/021279

    申请日：2019-03-08

    Applicant: QUALCOMM INCORPORATED

    Inventor： OPSHAUG, Guttorm Ringstad ,  PON, Rayman Wai ,  WU, Jie ,  BHUSHAN, Naga ,  FISCHER, Sven ,  EDGE, Stephen William

    IPC: H04W24/10 ,  H04W64/00 ,  G01S5/00 ,  G01S5/02

    Abstract: Mobile devices often use orthogonal frequency division multiplexing (OFDM) to calculate position information of mobile devices within the network. However, physical distance between the mobile device and a signal source for positioning and other environmental factors can influence the signal strength of received signals. Received signals at the mobile device that are stronger may drown out the weaker signals, particularly when two signal sources occupy the same symbol. In traditional OFDM, a signal source transmits the same symbol for each positioning occasion, so a weaker signal may never be detected over a stronger signal, reducing the accuracy of the positioning calculations. Described herein are systems and methods for using a pattern to vary the designated symbol for each signal source in a wireless network so that a weaker signal from a signal source may be detected on at least some of the positioning occasions.

    SEQUENTIAL TRACKING AND OFFLINE DEMODULATION IN RECEIVER
    5.
    发明申请
    SEQUENTIAL TRACKING AND OFFLINE DEMODULATION IN RECEIVER 审中-公开
    接收器中的顺序跟踪和离线解调

    公开(公告)号：WO2009073522A1

    公开(公告)日：2009-06-11

    申请号：PCT/US2008/084890

    申请日：2008-11-26

    Applicant: QUALCOMM INCORPORATED ,  FARMER, Dominic, Gerard ,  SIMIC, Emilija, M. ,  WU, Jie

    Inventor： FARMER, Dominic, Gerard ,  SIMIC, Emilija, M. ,  WU, Jie

    IPC: G01S1/00

    CPC classification number: G01S19/29

    Abstract: An apparatus and method for tracking a desired signal by sequentially tracking the desired signal with a variable integration time, performing automatic frequency control of the desired signal, and demodulating the desired signal using offline software. In one aspect, the automatic frequency control is performed using the offline software. In one aspect, the desired signal is from a GPS satellite.

    Abstract translation: 一种用于通过以可变积分时间顺序跟踪期望信号来跟踪期望信号的装置和方法，执行所需信号的自动频率控制，以及使用离线软件解调所需信号。 一方面，使用离线软件进行自动频率控制。 在一个方面，期望的信号来自GPS卫星。

    SIGNAL STRUCTURE FOR NAVIGATION AND POSITIONING SIGNALS
    6.
    发明申请
    SIGNAL STRUCTURE FOR NAVIGATION AND POSITIONING SIGNALS 审中-公开

    公开(公告)号：WO2019194921A1

    公开(公告)日：2019-10-10

    申请号：PCT/US2019/020556

    申请日：2019-03-04

    Applicant: QUALCOMM INCORPORATED

    Inventor： OPSHAUG, Guttorm Ringstad ,  FISCHER, Sven ,  BHUSHAN, Naga ,  EDGE, Stephen William ,  WU, Jie ,  PON, Rayman Wai

    IPC: G01S5/10 ,  H04W64/00

    Abstract: Methods, apparatuses, and computer-readable media are described. In one example, a method, on a base station, for providing position measurements signals in a wireless communication network, comprises: determining a plurality of subcarriers for downlink transmission, wherein the plurality of subcarriers for downlink transmission comprise all subcarriers indicated in a resource block of a scheduled time of transmission within a scheduled transmission occasion, wherein the resource block comprises a plurality of symbol periods, wherein each symbol period of the plurality of symbol periods is for transmission of a symbol using one or more subcarriers of the plurality of subcarriers (610); and transmitting at the scheduled time of transmission, and using each subcarrier of the plurality of subcarriers, a wireless position measurement signal at the scheduled transmission occasion, the wireless position measurement signal being part of a sequence of wireless signals representing a position measurement signal bitstream (620).

    METHODS AND SYSTEMS FOR MOBILE DEVICE CLOCK MANAGEMENT
    7.
    发明申请
    METHODS AND SYSTEMS FOR MOBILE DEVICE CLOCK MANAGEMENT 审中-公开
    移动设备时钟管理的方法和系统

    公开(公告)号：WO2015066652A2

    公开(公告)日：2015-05-07

    申请号：PCT/US2014/063755

    申请日：2014-11-03

    Applicant: QUALCOMM INCORPORATED

    Inventor： FARMER, Dominic Gerard ,  WU, Jie ,  MORRISON, William James ,  LIN, Tong ,  RAO, Krishnaranjan S.

    IPC: H04W56/00

    CPC classification number: G01S19/13 ,  G01P15/00 ,  G06F17/30289 ,  H04W56/0035

    Abstract: Disclosed are methods, systems and/or devices to calibrate a network time by acquisition of satellite positioning system (SPS) signals and different instances of time, and time-tagging SPS times according to the network time. In particular, the network time may be calibrated based, at least in part, on a first difference between first and second SPS times obtained at two SPS position fixes and a second difference between corresponding first and second time stamps.

    Abstract translation: 公开了通过采集卫星定位系统（SPS）信号和不同时间的实例来校准网络时间的方法，系统和/或设备，以及根据网络时间的时间标签SPS时间。 特别地，可以至少部分地基于在两个SPS位置固定处获得的第一和第二SPS时间之间的第一差异和相应的第一和第二时间戳之间的第二差异来校准网络时间。

    BACKGROUND CRYSTAL OSCILLATOR CALIBRATION
    8.
    发明申请
    BACKGROUND CRYSTAL OSCILLATOR CALIBRATION 审中-公开
    背景振荡器校准

    公开(公告)号：WO2014004879A1

    公开(公告)日：2014-01-03

    申请号：PCT/US2013/048264

    申请日：2013-06-27

    Applicant: QUALCOMM INCORPORATED

    Inventor： WU, Jie ,  FILIPOVIC, Daniel Fred ,  SIMIC, Emilija Milorad ,  AGARWAL, Vishal

    IPC: G01S19/23

    CPC classification number: H04W56/00 ,  G01S19/235 ,  H03L1/022

    Abstract: System and method for temperature-calibration of a crystal oscillator (XO) in a mobile device. A temperature-calibration status of the XO is determined and a trigger condition related to temperature-calibration of the XO is detected. If the temperaturecalibration status of the XO is not fully temperature-calibrated or if the XO has not been previously temperature-calibrated, a temperature-calibration session is initiated by an XO manager based on the condition, wherein a receiver is configured to receive signals and temperature-calibration of the XO is performed in a background mode based on the received signals. The condition based triggering ensures that the XO is temperaturecalibrated prior to launch of any position based or global navigation satellite systems (GNSS) based applications on the mobile device. The trigger condition can include first use or power-on, charging, presence in an outdoor environment, variation in operating temperature, pre-specified time, and/or user input pertaining to the mobile device.

    Abstract translation: 用于移动设备中晶体振荡器（XO）的温度校准的系统和方法。 确定XO的温度校准状态，并检测与XO的温度校准相关的触发条件。 如果XO的温度校准状态未完全温度校准，或者如果XO尚未经过温度校准，则XO管理器将基于条件启动温度校准会话，其中接收器配置为接收信号， 基于接收到的信号，在后台模式下进行XO的温度校准。 基于条件的触发确保在移动设备上启动任何基于位置或全球导航卫星系统（GNSS）的应用程序之前对XO进行温度校准。 触发条件可以包括首先使用或上电，充电，室外环境的存在，工作温度的变化，预先指定的时间和/或与移动设备有关的用户输入。

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