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    Multipath isolation through the combined use of antenna diversity and frequency diversity
    5.
    发明授权
    Multipath isolation through the combined use of antenna diversity and frequency diversity 有权
    通过组合使用天线分集和频率多样性进行多径隔离

    公开(公告)号：US08843313B2

    公开(公告)日：2014-09-23

    申请号：US13495958

    申请日：2012-06-13

    申请人： Per K. Enge ,  Bart Ferrell ,  Gregory M. Gutt ,  James C. Lassa ,  Michael A. Rizzo ,  David A. Whelan

    发明人： Per K. Enge ,  Bart Ferrell ,  Gregory M. Gutt ,  James C. Lassa ,  Michael A. Rizzo ,  David A. Whelan

    IPC分类号： G01S19/22 ,  G01S19/47 ,  G01S19/50

    CPC分类号： G01S19/22 ,  G01S19/47 ,  G01S19/50

    摘要： A method, system, and apparatus are disclosed for multipath isolation through the combined use of antenna diversity and frequency diversity. In particular, the present disclosure utilizes antenna diversity and frequency diversity to combat the deleterious effects of reflected signals on the positioning accuracy of satellite navigation systems. In at least one embodiment, the present disclosure uses two antennas and two frequencies for operation with a satellite navigation system. The present disclosure segregates the antennas and frequencies into two classes: references and monitors. The reference measurements are used for estimating the state of the vehicle, and the monitor measurements are used to detect faults that might degrade the reference estimation. Thus, the present disclosure enables an improvement in the positioning error experienced by roving users in downtown and indoor environments. Applications include positive train control, aircraft surface guidance, marine craft navigation in canals and ports, as well as automotive lane keeping.

    摘要翻译： 公开了通过天线分集和频率分集的组合使用来进行多径隔离的方法，系统和装置。 特别地，本公开利用天线分集和频率分集来对抗反射信号对卫星导航系统的定位精度的有害影响。 在至少一个实施例中，本公开使用两个天线和两个频率来与卫星导航系统一起操作。 本公开将天线和频率分为两类：参考和监视器。 参考测量用于估计车辆的状态，并且使用监视器测量来检测可能降低参考估计的故障。 因此，本公开使得能够改善在市中心和室内环境中流动用户所经历的定位误差。 应用包括积极的列车控制，飞机表面导航，运河和港口的船舶导航，以及汽车车道保养。

    Multipath Isolation Through the Combined Use of Antenna Diversity and Frequency Diversity
    6.
    发明申请
    Multipath Isolation Through the Combined Use of Antenna Diversity and Frequency Diversity 有权
    通过天线分集和频率多样性的组合使用进行多路径隔离

    公开(公告)号：US20130335268A1

    公开(公告)日：2013-12-19

    申请号：US13495958

    申请日：2012-06-13

    申请人： Per K. Enge ,  Bart Ferrell ,  Gregory M. Gutt ,  James C. Lassa ,  Michael A. Rizzo ,  David A. Whelan

    发明人： Per K. Enge ,  Bart Ferrell ,  Gregory M. Gutt ,  James C. Lassa ,  Michael A. Rizzo ,  David A. Whelan

    IPC分类号： G01S19/22

    CPC分类号： G01S19/22 ,  G01S19/47 ,  G01S19/50

    摘要： A method, system, and apparatus are disclosed for multipath isolation through the combined use of antenna diversity and frequency diversity. In particular, the present disclosure utilizes antenna diversity and frequency diversity to combat the deleterious effects of reflected signals on the positioning accuracy of satellite navigation systems. In at least one embodiment, the present disclosure uses two antennas and two frequencies for operation with a satellite navigation system. The present disclosure segregates the antennas and frequencies into two classes: references and monitors. The reference measurements are used for estimating the state of the vehicle, and the monitor measurements are used to detect faults that might degrade the reference estimation. Thus, the present disclosure enables an improvement in the positioning error experienced by roving users in downtown and indoor environments. Applications include positive train control, aircraft surface guidance, marine craft navigation in canals and ports, as well as automotive lane keeping.

    摘要翻译： 公开了通过天线分集和频率分集的组合使用来进行多径隔离的方法，系统和装置。 特别地，本公开利用天线分集和频率分集来对抗反射信号对卫星导航系统的定位精度的有害影响。 在至少一个实施例中，本公开使用两个天线和两个频率来与卫星导航系统一起操作。 本公开将天线和频率分为两类：参考和监视器。 参考测量用于估计车辆的状态，并且使用监视器测量来检测可能降低参考估计的故障。 因此，本公开使得能够改善在市中心和室内环境中流动用户所经历的定位误差。 应用包括积极的列车控制，飞机表面导航，运河和港口的船舶导航，以及汽车车道保养。

    Image-aided positioning and navigation system
    7.
    发明授权
    Image-aided positioning and navigation system 有权
    图像辅助定位导航系统

    公开(公告)号：US08509488B1

    公开(公告)日：2013-08-13

    申请号：US12711913

    申请日：2010-02-24

    申请人： Per K. Enge ,  Yi-Hsiu Wang

    发明人： Per K. Enge ,  Yi-Hsiu Wang

    IPC分类号： G06K9/00 ,  G06K9/20

    CPC分类号： G01C21/3623

    摘要： Satellite-based navigation techniques can help determine a user's position on a map and can also determine directions to a destination. Functionality can be implemented to determine the user's orientation and direction of motion based on a captured image taken in the direction of motion. The captured image may be preprocessed to compensate for a camera angle and to vary image properties before being transmitted to a server. The user's orientation may be determined based, at least in part, on knowledge of a user's position on a map and comparing the captured image to a set of other images. Walking directions can accordingly be tailored based on the user's orientation.

    摘要翻译： 基于卫星的导航技术可以帮助确定用户在地图上的位置，并且还可以确定到目的地的方向。 可以实现功能，以基于沿运动方向拍摄的拍摄图像来确定用户的方向和运动方向。 捕获的图像可以被预处理以补偿相机角度并且在传送到服务器之前改变图像属性。 可以至少部分地基于用户在地图上的位置的知识并将捕获的图像与一组其他图像进行比较来确定用户的取向。 因此，步行方向可以根据用户的方向进行调整。

    AUTHENTICATION BASED ON RANDOM BITS IN SATELLITE NAVIGATION MESSAGES
    8.
    发明申请
    AUTHENTICATION BASED ON RANDOM BITS IN SATELLITE NAVIGATION MESSAGES 有权

    公开(公告)号：US20130060955A1

    公开(公告)日：2013-03-07

    申请号：US13603316

    申请日：2012-09-04

    申请人： Per K. Enge

    发明人： Per K. Enge

    IPC分类号： G06F15/16

    CPC分类号： G01S19/215 ,  G01S19/09 ,  H04W12/08 ,  H04W12/10 ,  H04W12/12

    摘要： A system and methods for location authentication are presented. A subset of demodulated server received navigation signals are selected synchronized to client bit frames to provide synchronized server bit frames. A function of the synchronized server bit frames is computed to provide a server signature set. A client signature set and the server signature set are compared to provide a comparison result, and a location of a client device is authenticated based on the comparison result.

    Receiver with means for ensuring bona fide of received signals
    9.
    发明授权
    Receiver with means for ensuring bona fide of received signals 有权
    接收机具有确保收到信号的真实性的手段

    公开(公告)号：US08068054B2

    公开(公告)日：2011-11-29

    申请号：US12012470

    申请日：2008-02-02

    申请人： Peter Levin ,  David S. De Lorenzo ,  Per K. Enge ,  Sherman C. Lo

    发明人： Peter Levin ,  David S. De Lorenzo ,  Per K. Enge ,  Sherman C. Lo

    IPC分类号： G01S19/03 ,  G01S19/09 ,  G01S19/32

    CPC分类号： G01S19/21 ,  G01S19/29

    摘要： A receiver that receives a plurality of signals that are modulated with a common carrier, where each signal of said signals originates at a different source and experiences a transit delay and Doppler frequency shift before reaching the receiver, and where the transit delay and Doppler frequency shift are related to position and movement of each of the respective sources. The receiver includes means, such as a directional antenna, to ensure that the received signals are bona fide, or at least not subject to the same bogus signal or signals to which a second receiver may be subjected.

    摘要翻译： 接收器，其接收由公共载波调制的多个信号，其中所述信号的每个信号源于不同的源，并且在到达接收机之前经历传输延迟和多普勒频移，并且其中传输延迟和多普勒频移 与各个源的位置和移动有关。 接收机包括诸如定向天线的装置，以确保所接收的信号是真实的，或者至少不受第二接收机可能遭受的相同的虚假信号或信号的影响。