De-weighting of outlier signals in a radio frequency navigation system

    公开(公告)号:US09817102B1

    公开(公告)日:2017-11-14

    申请号:US15179889

    申请日:2016-06-10

    Applicant: Apple Inc.

    CPC classification number: G01S5/0263 G01S5/021 G01S19/13 H04W4/02

    Abstract: Methods, systems and computer program products for determining and filtering potential outliers in RF signals used in radionavigation are described. A radionavigation subsystem of a mobile device can determine a first location estimate of the mobile device. The mobile device can determine a free direction from the first location estimate. The free direction can be a direction along which RF signals may cause greater position errors than RF signals from other directions may cause. The mobile device can determine a potential outlier among the received RF signals, the potential outlier being an RF signal from a signal source in the free direction. The mobile device can indicate to the radionavigation subsystem that a weight of the potential outlier shall be reduced when determining a second location estimate of the mobile device using the RF signals.

    Pedometer with lag correction
    33.
    发明授权

    公开(公告)号:US09702899B2

    公开(公告)日:2017-07-11

    申请号:US14846619

    申请日:2015-09-04

    Applicant: Apple Inc.

    CPC classification number: G01P21/00 G01C22/006

    Abstract: Systems, methods and computer-readable storage mediums are disclosed for a pedometer with lag correction. In some implementations, a method comprises: determining, by a first pedometer of an electronic device, a first step count based on sensor data provided by a motion sensor of the electronic device; determining, by a second pedometer of the electronic device, a second step count based on a window of the sensor data; responsive to determining that a step was detected by the second pedometer, determining a third step count based on the window of sensor data; and determining a corrected step count based on the third step count.

    DOPPLER SHIFT CORRECTION USING THREE-DIMENSIONAL BUILDING MODELS
    34.
    发明申请
    DOPPLER SHIFT CORRECTION USING THREE-DIMENSIONAL BUILDING MODELS 审中-公开
    使用三维建筑模型的多普勒移位校正

    公开(公告)号:US20170068001A1

    公开(公告)日:2017-03-09

    申请号:US14848241

    申请日:2015-09-08

    Applicant: Apple Inc.

    Abstract: Techniques for GNSS positioning using three-dimensional (3D) building models are described. A processor can determine a probable path for a signal from a GNSS space vehicle (e.g., a satellite) to reach the GNSS receiver. The probable path can include one or more specular reflections. The processor can determine a Doppler correction based on the probable path, including inverting a sense of a vector of the Doppler correction for each reflection. The processor can then incorporate the Doppler correction in an estimated velocity of the mobile device, an estimated position of the mobile device, or both.

    Abstract translation: 描述了使用三维(3D)建筑模型进行GNSS定位的技术。 处理器可以确定来自GNSS空间车辆(例如,卫星)的信号到达GNSS接收机的可能路径。 可能的路径可以包括一个或多个镜面反射。 处理器可以基于可能的路径确定多普勒校正,包括反转用于每次反射的多普勒校正的矢量的感测。 然后,处理器可以以移动设备的估计速度,移动设备的估计位置或二者结合多普勒校正。

    GNSS POSITIONING USING THREE-DIMENSIONAL BUILDING MODELS
    35.
    发明申请
    GNSS POSITIONING USING THREE-DIMENSIONAL BUILDING MODELS 有权
    使用三维建筑模型的GNSS定位

    公开(公告)号:US20170067999A1

    公开(公告)日:2017-03-09

    申请号:US14848234

    申请日:2015-09-08

    Applicant: Apple Inc.

    CPC classification number: G01S19/12 G01S19/39 G01S19/42 G01S19/428 G01S19/52

    Abstract: Techniques for GNSS positioning using three-dimensional (3D) building models are described. A processor of a mobile device can determine a lower bound of uncertainty for an estimated position of the mobile device. The processor can receive an estimated position from a GNSS receiver of the mobile device. The processor can acquire geographic feature data including 3D building models of buildings and other geographic features that are located near the estimated position and may reflect GNSS signals. The processor can then determine a lower bound of uncertainty of the estimated position, regardless of an estimated uncertainty provided by a GNSS estimator. The lower bound can be higher (e.g., have a greater error margin) than the uncertainty value provided by the GNSS estimator. The processor can then present the estimated position, in association with an error margin corresponding to the lower bound of uncertainty, on a map user interface of the mobile device.

    Abstract translation: 描述了使用三维(3D)建筑模型进行GNSS定位的技术。 移动设备的处理器可以确定移动设备的估计位置的不确定性的下限。 处理器可以从移动设备的GNSS接收器接收估计的位置。 处理器可以获取地理特征数据,包括建筑物的3D建筑模型和位于估计位置附近的其他地理特征,并且可以反映GNSS信号。 然后,处理器可以确定估计位置的不确定性的下限,而不管由GNSS估计器提供的估计的不确定性。 下限可以比由GNSS估计器提供的不确定性值更高(例如,具有更大的误差容限)。 然后处理器可以在移动设备的地图用户界面上呈现与相应于不确定性的较低界限的误差边界相关联的估计位置。

    Location Support For Emergency Calls
    37.
    发明申请
    Location Support For Emergency Calls 审中-公开
    位置支持紧急呼叫

    公开(公告)号:US20170006418A1

    公开(公告)日:2017-01-05

    申请号:US15201320

    申请日:2016-07-01

    Applicant: Apple Inc.

    CPC classification number: H04W4/02 G01S19/17 H04L65/1006 H04L65/1069 H04W4/90

    Abstract: System and method for submitting a location of a mobile device to a public service for providing emergency assistance are described. A mobile device can determine that a user is making an emergency call from the mobile device. The mobile device can then enable a location determination function of the mobile device and determine a location of the mobile device. The mobile device can determine the location in multiple attempts, including, in a first time window, attempting to determine a location with low uncertainty and, if the attempt fails, determining a location with high uncertainty in a second time window. The mobile device can then submit the location to a dispatcher through a mobile network operator.

    Abstract translation: 描述了用于向公共服务提供移动设备的位置以提供紧急援助的系统和方法。 移动设备可以确定用户正在从移动设备进行紧急呼叫。 移动设备然后可以启用移动设备的位置确定功能并确定移动设备的位置。 移动设备可以在多次尝试中确定位置,包括在第一时间窗口中尝试确定具有低不确定性的位置,并且如果尝试失败,则在第二时间窗口中确定具有高不确定性的位置。 然后,移动设备可以通过移动网络运营商将该位置提交给调度员。

    Multimode Pedestrian Odometer
    38.
    发明申请
    Multimode Pedestrian Odometer 审中-公开
    多模步行里程表

    公开(公告)号:US20160349376A1

    公开(公告)日:2016-12-01

    申请号:US14838127

    申请日:2015-08-27

    Applicant: Apple Inc.

    CPC classification number: G01S19/34 G01C21/165 G01S19/52

    Abstract: Systems, methods and non-transitory, computer-readable storage mediums are disclosed for a multimode GNSS odometer. In some implementations, a method comprises: obtaining, by a device, position and velocity data from a sensor embedded in, or coupled to the device; statistically combining, by the device, the position and velocity data to generate a first delta distance travelled by the device over a period of time, the statistical combining including weighting a contribution of an integrated speed to the first delta distance, the integrated speed derived from the obtained velocity data and period of time; filtering, by the device, the first delta distance to generate a filtered first delta distance; and generating, by the device, a first estimate of total distance travelled by the device based on the filtered first delta distance.

    Abstract translation: 公开了用于多模式GNSS里程计的系统,方法和非暂时的计算机可读存储介质。 在一些实施方式中,一种方法包括:通过设备获得来自嵌入或耦合到所述设备的传感器的位置和速度数据; 通过所述装置统计地组合所述位置和速度数据以产生所述装置在一段时间内行进的第一增量距离,所述统计组合包括对集成速度对第一增量距离的贡献加权,从 获取的速度数据和时间段; 由设备过滤第一增量距离以产生经滤波的第一增量距离; 以及由所述设备根据所述经滤波的第一增量距离来生成由所述设备行进的总距离的第一估计。

    Altitude estimation using a probability density function

    公开(公告)号:US09253600B2

    公开(公告)日:2016-02-02

    申请号:US14468278

    申请日:2014-08-25

    Applicant: Apple Inc.

    Abstract: Methods, program products, and systems of location estimation using a probability density function are disclosed. In general, in one aspect, a server can estimate an effective altitude of a wireless access gateway using harvested data. The server can harvest location data from multiple mobile devices. The harvested data can include a location of each mobile device and an identifier of a wireless access gateway that is located within a communication range of the mobile device. The server can calculate an effective altitude of the wireless access gateway using a probability density function of the harvested data. The probability density function can be a sufficient statistic of the received set of location coordinates for calculating an effective altitude of the wireless access gateway. The server can send the effective altitude of the wireless access gateway to other mobile devices for estimating altitudes of the other mobile devices.

    Determining Location System Signal Quality
    40.
    发明申请
    Determining Location System Signal Quality 审中-公开
    确定位置系统信号质量

    公开(公告)号:US20150347351A1

    公开(公告)日:2015-12-03

    申请号:US14292793

    申请日:2014-05-30

    Applicant: Apple Inc.

    CPC classification number: H04W4/025 G01S19/23 G01S19/28 G01S19/39

    Abstract: Among other things, we describe a method that includes, on an electronic device, determining that a current quality metric of signals received by a location system of the electronic device does not meet a threshold quality metric, and based on the determination, selecting a recommendation for changing a position of the device in a manner that would alter the current quality metric. This aspect can also include corresponding systems, apparatus, and computer program products stored on a storage device.

    Abstract translation: 除其他之外,我们描述了一种在电子设备上包括确定由电子设备的位置系统接收的信号的当前质量度量不满足阈值质量度量的方法,并且基于该确定,选择推荐 用于以将改变当前质量度量的方式改变设备的位置。 该方面还可以包括存储在存储设备上的相应系统,设备和计算机程序产品。

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