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    TIMING CIRCUIT CALIBRATION
    2.
    发明申请
    TIMING CIRCUIT CALIBRATION 审中-公开

    公开(公告)号：US20200174137A1

    公开(公告)日：2020-06-04

    申请号：US16786360

    申请日：2020-02-10

    Applicant: QUALCOMM Incorporated

    Inventor： Jie WU ,  Dominic Gerard FARMER ,  Lalitaprasad DAITA ,  Emilija SIMIC

    IPC: G01S19/23 ,  G01S19/34 ,  G01S19/39

    Abstract: Disclosed are devices, systems and techniques for propagating a system time maintained at a mobile device in a lower power mode using a sleep counter advanced by an XO crystal oscillator. In one particular implementation, a mobile device obtains initial and subsequent satellite positioning system fixes while in a higher power mode. Between the initial and subsequent position fixes, the mobile device may transition to a lower power mode during which measurements of a temperature of the XO crystal oscillator may be obtained.

    BACKGROUND CRYSTAL OSCILLATOR CALIBRATION
    3.
    发明申请
    BACKGROUND CRYSTAL OSCILLATOR CALIBRATION 审中-公开

    公开(公告)号：US20190261293A1

    公开(公告)日：2019-08-22

    申请号：US16402203

    申请日：2019-05-02

    Applicant: QUALCOMM Incorporated

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

    IPC: H04W56/00 ,  G01S19/23 ,  H03L1/02

    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 temperature-calibration 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 temperature-calibrated 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.

    WATER-RELATED ACTION TRIGGERING
    4.
    发明申请
    WATER-RELATED ACTION TRIGGERING 审中-公开

    公开(公告)号：US20180329075A1

    公开(公告)日：2018-11-15

    申请号：US15711130

    申请日：2017-09-21

    Applicant: QUALCOMM Incorporated

    Inventor： Jie WU ,  Robert THRASHER ,  Jeffrey WONG ,  Krishnaranjan RAO

    IPC: G01S19/42 ,  G01S19/34

    CPC classification number: G01S19/19 ,  A63B2244/20 ,  G01S19/34

    Abstract: A method of triggering an action includes: determining that a mobile device is under water by: determining that an amplitude of a satellite positioning system (SPS) signal, or a wireless communication signal, or a combination thereof, received by the mobile device is below a threshold amplitude; or comparing data from a motion sensor of the mobile device with motion sensor data characteristic of entering water; or a combination thereof; determining that the mobile device has an action-inducing relationship to water; and taking the action in response to determining that the mobile device has the action-inducing relationship to water.

    BACKGROUND CRYSTAL OSCILLATOR CALIBRATION
    10.
    发明申请
    BACKGROUND CRYSTAL OSCILLATOR CALIBRATION 有权
    背景振荡器校准

    公开(公告)号：US20140004800A1

    公开(公告)日：2014-01-02

    申请号：US13784046

    申请日：2013-03-04

    Applicant: QUALCOMM INCORPORATED

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

    IPC: H04W56/00

    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 temperature-calibration 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 temperature-calibrated 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的温度校准状态未被完全温度校准，或者如果XO尚未被温度校准，则基于条件由XO管理器启动温度校准会话，其中接收器被配置为接收 基于接收到的信号，在后台模式下执行XO的信号和温度校准。 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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