Method of keeping a GPS receiver in a state that enables rapid signal acquisition
    2.
    发明授权
    Method of keeping a GPS receiver in a state that enables rapid signal acquisition 有权
    保持GPS接收机处于能够快速获取信号的状态的方法

    公开(公告)号:US08823587B2

    公开(公告)日:2014-09-02

    申请号:US13173147

    申请日:2011-06-30

    IPC分类号: G01S19/27 G01S19/31

    CPC分类号: G01S19/34 G01S19/27

    摘要: Aspects of a method and system for keeping a device for satellite navigation in a state that enables rapid signal acquisition are provided. The device may acquire broadcast ephemeris from one or more satellite signals during a data refresh operation. The satellite signals may comprise a GPS signal, a GLONASS signal, a GALILEO signal, or a combination thereof. The device may compute extended or future ephemeris from the acquired broadcast ephemeris during the data refresh operation. In a positioning operation that is subsequent to the data refresh operation, the device may determine satellite navigation information from the computed extended ephemeris. In some instances, a time associated with a schedule of the data refresh operation may be adjusted based on the computed extended ephemeris. The extended ephemeris may be computed by integrating current and/or historic broadcast ephemeris into an orbit model.

    摘要翻译: 提供了一种用于将卫星导航设备保持在能够进行快速信号采集的状态的方法和系统。 该装置可以在数据刷新操作期间从一个或多个卫星信号获取广播星历。 卫星信号可以包括GPS信号,GLONASS信号,GALILEO信号或其组合。 该装置可以在数据刷新操作期间从所获取的广播星历中计算延长的或未来的星历。 在数据刷新操作之后的定位操作中,设备可以从计算出的扩展星历中确定卫星导航信息。 在一些情况下,可以基于所计算的扩展星历来调整与数据刷新操作的调度相关联的时间。 扩展星历可以通过将当前和/或历史广播星历集成到轨道模型中来计算。

    APPARATUS AND METHOD TO CONSERVE POWER IN A PORTABLE GNSS UNIT
    3.
    发明申请
    APPARATUS AND METHOD TO CONSERVE POWER IN A PORTABLE GNSS UNIT 有权
    在便携式GNSS单元中保存电力的装置和方法

    公开(公告)号:US20130271314A1

    公开(公告)日:2013-10-17

    申请号:US13446744

    申请日:2012-04-13

    IPC分类号: G01S19/52 G06F15/00 G01S19/49

    摘要: A device is disclosed that is capable of determining its location using high-power with high accuracy, and using low-power with lower accuracy. By coordinating usage between the high power method and the low power, overall power consumption of the device can be significantly reduced without a significant reduction in accuracy. Such high accuracy may be achieved through the use of a GNSS unit, such a GPS receiver. In addition, the low-power alternative may be achieved using an accelerometer, together with software, hardware or firmware for extrapolating a speed based on the force measurements by the accelerometer. In this manner, the GPS receiver can be operated for only a fraction of overall use, primarily to provide adjustment data necessary to calibrate usage of the accelerometer.

    摘要翻译: 公开了能够以高精度高精度地确定其位置并且以较低精度使用低功率的装置。 通过协调高功率方式和低功率之间的使用,可以显着降低设备的总体功耗,而不会显着降低精度。 这样的高精度可以通过使用诸如GPS接收机的GNSS单元来实现。 此外,可以使用加速度计以及基于加速度计的力测量来推断速度的软件,硬件或固件来实现低功率替代。 以这种方式,GPS接收机可以仅用于整体使用的一小部分,主要是提供校准加速度计的使用所需的调整数据。

    Method and system for extending the usability period of long term orbit (LTO)
    4.
    发明授权
    Method and system for extending the usability period of long term orbit (LTO) 有权
    延长长期轨道(LTO)可用性的方法和系统

    公开(公告)号:US08358245B2

    公开(公告)日:2013-01-22

    申请号:US12326465

    申请日:2008-12-02

    CPC分类号: G01S19/27 G01S19/05

    摘要: Aspects of a method and system for extending the usability period of long term orbit (LTO) are provided. A GPS enabled handset may receive LTO data from an AGPS server via a wireless communication network such as 3GPP or WiMAX. The GPS enabled handset may be enabled to receive broadcast GPS signals. The GPS enabled handset may extract navigation information from the received broadcast GPS signals to be used to adjust the received LTO data. The usability period of the received LTO data may be extended, accordingly. A clock model and a satellite health model associated with the extracted navigation information may be used to update or replace the clock model and/or the satellite health model of the received LTO data, respectively. A navigation solution for the GPS enabled handset may be determined more accurately based on the adjusted LTO data.

    摘要翻译: 提供了扩展长期轨道(LTO)可用性时期的方法和系统的方面。 支持GPS的手机可以经由诸如3GPP或WiMAX的无线通信网络从AGPS服务器接收LTO数据。 启用GPS的手机可以被使能以接收广播GPS信号。 支持GPS的手机可以从接收到的广播GPS信号中提取导航信息,以用于调整所接收的LTO数据。 相应地可以扩展接收到的LTO数据的可用性周期。 可以使用与所提取的导航信息相关联的时钟模型和卫星健康模型来更新或替换所接收的LTO数据的时钟模型和/或卫星健康模型。 可以基于经调整的LTO数据更准确地确定用于支持GPS的手机的导航解决方案。

    Method and apparatus for combining measurements and determining clock offsets between different global navigation satellite systems
    6.
    发明授权
    Method and apparatus for combining measurements and determining clock offsets between different global navigation satellite systems 有权
    用于组合测量和确定不同全球导航卫星系统之间的时钟偏移的方法和装置

    公开(公告)号:US08054222B2

    公开(公告)日:2011-11-08

    申请号:US12350006

    申请日:2009-01-07

    IPC分类号: G01S19/28 G01S19/33

    摘要: Method and apparatus for processing satellite signals from a first satellite navigation system and a second satellite navigation system is described. In one example, at least one first pseudorange between a satellite signal receiver and at least one satellite of the first satellite navigation system is measured. At least one second pseudorange between the satellite signal receiver and at least one satellite of the second satellite navigation system is measured. A first difference between a first time reference frame of the first satellite navigation system and a time reference and a second difference between a second time reference frame of the second satellite navigation system and the time reference are obtained. The at least one first pseudorange and the at least one second pseudorange are combined using the first and second differences in time references.

    摘要翻译: 描述了用于处理来自第一卫星导航系统和第二卫星导航系统的卫星信号的方法和装置。 在一个示例中,测量卫星信号接收机与第一卫星导航系统的至少一个卫星之间的至少一个第一伪距。 测量卫星信号接收机与第二卫星导航系统的至少一个卫星之间的至少一秒的第二伪距。 获得第一卫星导航系统的第一时间参考帧与时间基准之间的第一差异,以及第二卫星导航系统的第二时间参考帧与时间基准之间的第二差值。 使用时间参考中的第一和第二差异来组合至少一个第一伪距和至少一个第二伪距。

    Method and Apparatus for Validating a Position in a Satellite Positioning System Using Range-Rate Measurements
    7.
    发明申请
    Method and Apparatus for Validating a Position in a Satellite Positioning System Using Range-Rate Measurements 有权
    用于使用范围速率测量来验证卫星定位系统中的位置的方法和装置

    公开(公告)号:US20110199258A1

    公开(公告)日:2011-08-18

    申请号:US13095056

    申请日:2011-04-27

    IPC分类号: G01S19/42

    CPC分类号: G01S19/42

    摘要: Method and apparatus for validating an initial position in a satellite positioning system using range-rate measurements is described. In one example, range-rate measurements are obtained at the remote receiver with respect to a plurality of satellites. Expected range-rates are computed with respect to the plurality of satellites using the initial position. Single differences are computed using the range-rate measurements. Expected single differences are computed using the expected range-rates. Single difference residuals are computed between the single differences and the expected single differences. The single difference residuals are compared to a threshold. The initial position may be deemed valid if the absolute value of each of the single difference residuals is less than or equal to the threshold. A valid initial position may be used to fix the pseudorange integers.

    摘要翻译: 描述了使用范围速率测量来验证卫星定位系统中的初始位置的方法和装置。 在一个示例中,距远程接收机相对于多个卫星获得距离率测量。 使用初始位置相对于多个卫星计算预期的距离率。 使用范围速率测量计算单一差异。 预期的单一差异使用预期的范围速率计算。 在单一差异和预期的单一差异之间计算单个差异残差。 将单个差值残差与阈值进行比较。 如果每个单一差分残差的绝对值小于或等于阈值,则初始位置可以被认为是有效的。 可以使用有效的初始位置来固定伪距整数。

    Method and apparatus for determining absolute time-of-day in a mobile-assisted satellite positioning system
    8.
    发明授权
    Method and apparatus for determining absolute time-of-day in a mobile-assisted satellite positioning system 有权
    用于确定移动辅助卫星定位系统中绝对时间的方法和装置

    公开(公告)号:US07940214B2

    公开(公告)日:2011-05-10

    申请号:US12718525

    申请日:2010-03-05

    IPC分类号: G01S19/25 G04G5/00

    CPC分类号: G01S19/258 G01S19/27

    摘要: A method and apparatus for determining time-of-day in a mobile receiver is described. In one example, expected pseudoranges to a plurality of satellites are obtained. The expected pseudoranges are based on an initial position of the mobile receiver and an initial time-of-day. Expected line-of-sight data to said plurality of satellites is also obtained. Pseudoranges from said mobile receiver to said plurality of satellites are measured. Update data for the initial time-of-day is computed using a mathematical model relating the pseudoranges, the expected pseudoranges, and the expected line-of-sight data. The expected pseudoranges and the expected line-of-sight data may be obtained from acquisition assistance data transmitted to the mobile receiver by a server. Alternatively, the expected pseudoranges may be obtained from acquisition assistance data, and the expected line-of-sight data may be computed by the mobile receiver using stored satellite trajectory data, such as almanac data.

    摘要翻译: 描述了一种用于确定移动接收机中的时间的方法和装置。 在一个示例中,获得对多个卫星的预期伪距。 预期伪距基于移动接收机的初始位置和初始时间。 还获得了对所述多颗卫星的视线数据。 测量从所述移动接收机到所述多个卫星的伪距离。 使用与伪距,预期伪距和预期视线数据相关联的数学模型来计算初始时间的更新数据。 可以从服务器发送到移动接收器的获取辅助数据获得期望的伪距和预期的视线数据。 或者,可以从获取辅助数据获得期望的伪距,并且可以由移动接收机使用存储的卫星轨迹数据(诸如年历数据)来计算预期的视距数据。

    METHOD AND APPARATUS FOR MONITORING THE INTEGRITY OF SATELLITE TRACKING DATA USED BY A REMOTE RECEIVER
    9.
    发明申请
    METHOD AND APPARATUS FOR MONITORING THE INTEGRITY OF SATELLITE TRACKING DATA USED BY A REMOTE RECEIVER 有权
    用于监测远程接收器使用的卫星跟踪数据的完整性的方法和装置

    公开(公告)号:US20100156714A1

    公开(公告)日:2010-06-24

    申请号:US12539258

    申请日:2009-08-11

    IPC分类号: G01S19/08 G01S19/29

    CPC分类号: G01S19/08 G01S19/05

    摘要: A method and apparatus for monitoring the integrity of satellite tracking data used by a remote receiver is described. In one example, a first set of satellite tracking data is received at a server. Integrity data for a second set of satellite tracking data is generated using the first set of satellite tracking data. The integrity data is then transmitted to at least one remote receiver having the second set of satellite tracking data.

    摘要翻译: 描述了用于监视由远程接收机使用的卫星跟踪数据的完整性的方法和装置。 在一个示例中,在服务器处接收第一组卫星跟踪数据。 使用第一组卫星跟踪数据生成第二组卫星跟踪数据的完整性数据。 完整性数据然后被发送到具有第二组卫星跟踪数据的至少一个远程接收机。

    METHOD AND APPARATUS FOR LOCATING MOBILE RECEIVERS USING A WIDE AREA REFERENCE NETWORK FOR PROPAGATING EPHEMERIS
    10.
    发明申请
    METHOD AND APPARATUS FOR LOCATING MOBILE RECEIVERS USING A WIDE AREA REFERENCE NETWORK FOR PROPAGATING EPHEMERIS 审中-公开
    使用广域参考网络定位移动接收机的方法和装置,用于传播EPHEMERIS

    公开(公告)号:US20090267833A1

    公开(公告)日:2009-10-29

    申请号:US12499198

    申请日:2009-07-08

    IPC分类号: G01S5/14

    摘要: A method and apparatus for distribution and delivery of global positioning system (GPS) satellite telemetry data using a communication link between a central site and a mobile GPS receiver. The central site is coupled to a network of reference satellite receivers that send telemetry data from all satellites to the central site. The mobile GPS receiver uses the delivered telemetry data to aid its acquisition of the GPS satellite signal. The availability of the satellite telemetry data enhances the mobile receiver's signal reception sensitivity.

    摘要翻译: 一种用于使用中心站点和移动GPS接收机之间的通信链路来分发和传送全球定位系统(GPS)卫星遥测数据的方法和装置。 中心站点耦合到从所有卫星发送遥测数据到中心站点的参考卫星接收机网络。 移动GPS接收机使用传送的遥测数据来帮助其获取GPS卫星信号。 卫星遥测数据的可用性增强了移动接收机的信号接收灵敏度。