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    Method and system for synchronizing multiple tracking devices for a geo-location system
    1.
    发明授权
    Method and system for synchronizing multiple tracking devices for a geo-location system 有权
    用于同步地理位置系统的多个跟踪设备的方法和系统

    公开(公告)号：US07292186B2

    公开(公告)日：2007-11-06

    申请号：US11029809

    申请日：2005-01-05

    申请人： Steven R. Miller ,  Bradley P. Badke ,  Michael L. Whitehead

    发明人： Steven R. Miller ,  Bradley P. Badke ,  Michael L. Whitehead

    IPC分类号： G01S5/14 ,  H04L7/00

    CPC分类号： G01S19/14 ,  G01S19/54

    摘要： A method and system of synchronizing multiple tracking devices in a geo-location receiver system comprising: receiving a first plurality of geo-location signals with a first tracking device; and receiving a second plurality of geo-location signals with a second tracking device. The method also includes: enabling the first tracking device as either a master tracking device or a master-with-mark tracking device; enabling the second tracking device to operate as a slave tracking device; the master tracking device generates and transmits a timing signal to the slave tracking device; and the master-with-mark tracking device is configured to receive an external input for synchronization and generates and transmits a timing signal to the slave tracking device. The method also includes acquiring the first plurality of geo-location signals and the second plurality of geo-location signals at a substantially simultaneous instant of time.

    摘要翻译： 一种在地理位置接收机系统中同步多个跟踪设备的方法和系统，包括：用第一跟踪设备接收第一多个地理位置信号; 以及用第二跟踪装置接收第二多个地理位置信号。 该方法还包括：使第一跟踪装置能够作为主跟踪装置或具有标记的主标记跟踪装置; 使得第二跟踪装置能够作为从属跟踪装置工作; 主跟踪装置产生并发送定时信号到从属跟踪装置; 并且主标记跟踪装置被配置为接收用于同步的外部输入，并且产生并发送定时信号到从属跟踪装置。 该方法还包括在基本上同时的时刻获取第一多个地理位置信号和第二多个地理位置信号。

    RF (INCLUDING GNSS) SIGNAL INTERFERENCE MITIGATION SYSTEM AND METHOD
    6.
    发明申请
    RF (INCLUDING GNSS) SIGNAL INTERFERENCE MITIGATION SYSTEM AND METHOD 有权
    射频（包括GNSS）信号干扰减轻系统和方法

    公开(公告)号：US20130142295A1

    公开(公告)日：2013-06-06

    申请号：US13705018

    申请日：2012-12-04

    申请人： Bradley P. Badke ,  Michael L. Whitehead ,  Walter J. Feller ,  Gregory J. Durnan

    发明人： Bradley P. Badke ,  Michael L. Whitehead ,  Walter J. Feller ,  Gregory J. Durnan

    IPC分类号： H04B15/00

    CPC分类号： H04B15/00 ,  G01S19/21 ,  G01S19/36 ,  H04B1/109

    摘要： An RF (e.g., GNSS) interference mitigation system and method uses a switchable bank of filters for selectively blocking signals in predetermined bandwidths based on detecting strong, interfering signals with an interference detection circuit including a sniffer antenna. A low-strength RF (e.g., GNSS) system can be combined with a spectrally-close high-strength, telecommunications receiver system for cooperative control. Alternatively, an RF receiver can detect tones, changes in DC bias or level changes to activate a filter selection switch.

    摘要翻译： RF（例如，GNSS）干扰减轻系统和方法使用可切换的滤波器组，用于基于使用包括嗅探天线的干扰检测电路检测强的干扰信号来选择性地阻挡预定带宽中的信号。 低强度RF（例如，GNSS）系统可以与光谱密集的高强度电信接收机系统组合以进行协同控制。 或者，RF接收机可以检测音调，DC偏置的变化或电平变化以激活滤波器选择开关。

    METHOD AND SYSTEM USING GNSS PHASE MEASUREMENTS FOR RELATIVE POSITIONING
    7.
    发明申请
    METHOD AND SYSTEM USING GNSS PHASE MEASUREMENTS FOR RELATIVE POSITIONING 有权
    使用GNSS相位测量进行相对定位的方法和系统

    公开(公告)号：US20090322600A1

    公开(公告)日：2009-12-31

    申请号：US12554741

    申请日：2009-09-04

    申请人： Michael L. Whitehead ,  Steven R. Miller ,  John A. McClure ,  Cary Davis ,  Walter J. Feller

    发明人： Michael L. Whitehead ,  Steven R. Miller ,  John A. McClure ,  Cary Davis ,  Walter J. Feller

    IPC分类号： G01S1/00

    CPC分类号： G01C15/00 ,  G01S5/0063 ,  G01S19/14 ,  G01S19/36 ,  G01S19/53 ,  G05D1/0206 ,  G05D1/0259 ,  G05D1/027 ,  G05D1/0278

    摘要： A method for locating GNSS-defined points, distances, directional attitudes and closed geometric shapes includes the steps of providing a base with a base GNSS antenna and providing a rover with a rover GNSS antenna and receiver. The receiver is connected to the rover GNSS antenna and is connected to the base GNSS antenna by an RF cable. The receiver thereby simultaneously processes signals received at the antennas. The method includes determining a vector directional arrow from the differential positions of the antennas and calculating a distance between the antennas, which can be sequentially chained together for determining a cumulative distance in a “digital tape measure” mode of operation. A localized RTK surveying method uses the rover antenna for determining relative or absolute point locations. A system includes a base with an antenna, a rover with an antenna and a receiver, with the receiver being connected to the antennas. A processor is provided for computing positions, directional vectors, areas and other related tasks.

    摘要翻译： 用于定位GNSS定义的点，距离，方向态度和闭合的几何形状的方法包括以下步骤：向基站提供基站GNSS天线并向流动站提供流动站GNSS天线和接收机。 接收机连接到漫游器GNSS天线，并通过RF电缆连接到基站GNSS天线。 接收器由此同时处理在天线处接收到的信号。 该方法包括从天线的差分位置确定矢量方向箭头并计算天线之间的距离，其可以被连续地链接在一起以确定“数字卷尺”操作模式中的累积距离。 本地RTK测量方法使用流动站天线来确定相对位置或绝对点位置。 系统包括具有天线的基座，具有天线的漫游器和接收器，接收器连接到天线。 提供了一种用于计算位置，方向向量，区域和其他相关任务的处理器。

    Multiple-antenna GNSS control system and method
    9.
    发明授权
    Multiple-antenna GNSS control system and method 有权
    多天线GNSS控制系统及方法

    公开(公告)号：US08140223B2

    公开(公告)日：2012-03-20

    申请号：US12355776

    申请日：2009-01-17

    申请人： Michael L. Whitehead ,  Walter J. Feller ,  John A. McClure ,  Steven R. Miller

    发明人： Michael L. Whitehead ,  Walter J. Feller ,  John A. McClure ,  Steven R. Miller

    IPC分类号： G01C21/28

    CPC分类号： G01C15/00 ,  A01B79/005 ,  G01S5/0063 ,  G01S5/0247 ,  G01S19/14 ,  G01S19/53 ,  G05D1/0259 ,  G05D1/027 ,  G05D1/0278 ,  G05D2201/0201

    摘要： A global navigation satellite sensor system (GNSS) and gyroscope control system for vehicle steering control comprising a GNSS receiver and antennas at a fixed spacing to determine a vehicle position, velocity and at least one of a heading angle, a pitch angle and a roll angle based on carrier phase position differences. The roll angle facilitates correction of the lateral motion induced position errors resultant from motion of the antennae as the vehicle moves based on an offset to ground and the roll angle. The system also includes a control system configured to receive the vehicle position, heading, and at least one of roll and pitch, and configured to generate a steering command to a vehicle steering system. The system includes gyroscopes for determining system attitude change with respect to multiple axes for integrating with GNSS-derived positioning information to determine vehicle position, velocity, rate-of-turn, attitude and other operating characteristics. A vehicle control method includes the steps of computing a position and a heading for the vehicle using GNSS positioning and a rate gyro for determining vehicle attitude, which is used for generating a steering command. Alternative aspects include multiple-antenna GNSS guidance methods for high-dynamic roll compensation, real-time kinematic (RTK) using single-frequency (L1) receivers, fixed and moving baselines between antennas, multi-position GNSS tail guidance (“breadcrumb following”) for crosstrack error correction and guiding multiple vehicles and pieces of equipment relative to each other.

    摘要翻译： 一种用于车辆转向控制的全球导航卫星传感器系统（GNSS）和陀螺仪控制系统，其包括GNSS接收器和固定间隔的天线，以确定车辆位置，速度以及行驶角，俯仰角和侧倾角 基于载波相位差。 滚动角度有助于校正当车辆基于对地面的偏移和侧倾角度而移动时由天线的运动产生的横向运动引起的位置误差。 该系统还包括被配置为接收车辆位置，航向以及滚动和俯仰中的至少一个的控制系统，并被配置为产生对车辆转向系统的转向命令。 该系统包括用于确定相对于多个轴的系统姿态变化的陀螺仪，用于与GNSS导航的定位信息集成以确定车辆位置，速度，转弯角度，姿态和其他操作特性。 车辆控制方法包括以下步骤：使用GNSS定位来计算车辆的位置和航向，以及用于确定用于产生转向命令的车辆姿态的速率陀螺仪。 替代方面包括用于高动态滚动补偿的多天线GNSS指导方法，使用单频（L1）接收机的实时运动学（RTK），天线之间的固定和移动基线，多位置GNSS尾部指导（“面包屑跟踪” ），用于交叉错误校正，并相对于彼此引导多个车辆和设备。

    Unbiased code phase estimator for mitigating multipath in GPS
    10.
    发明授权
    Unbiased code phase estimator for mitigating multipath in GPS 有权
    用于减轻GPS中多径的无偏差码相位估计器

    公开(公告)号：US06744404B1

    公开(公告)日：2004-06-01

    申请号：US10616752

    申请日：2003-07-09

    申请人： Michael L. Whitehead ,  Steven R. Miller

    发明人： Michael L. Whitehead ,  Steven R. Miller

    IPC分类号： H04B7185

    CPC分类号： G01S19/22 ,  G01S19/30 ,  H04B2001/70706 ,  H04B2201/70715

    摘要： A method of measuring phase of a pseudorandom (PN) sequence of chips, the method includes: generating a reference model exhibiting a reference phase, the reference phase adjustable to facilitate alignment with the phase of the pseudorandom sequence; establishing a plurality of pulsed-windows over which a plurality of samples of the pseudorandom sequence are collected for a selected accumulation interval; and accumulating the plurality of samples for each pulsed-window of the plurality of pulsed windows to form a plurality of accumulated sums. The method also includes: compensating each accumulated sum to form at least one compensated sum, if a number of level transitions and non-transitions of the pseudorandom sequence is not equal; and combining the compensated sum to determine a phase error from the plurality of compensated sums, the phase error corresponding to a phase difference between the reference phase and the phase of the pseudorandom sequence.

    摘要翻译： 一种测量芯片的伪随机序列（PN）序列的相位的方法，所述方法包括：产生呈现参考相位的参考模型，所述参考相位可调整以便于与所述伪随机序列的相位对准; 建立多个脉冲窗口，在所述多个脉冲窗口中收集所述伪随机序列的多个样本用于所选择的累积间隔; 以及为所述多个脉冲窗口中的每个脉冲窗积累所述多个样本以形成多个累加和。 该方法还包括：如果伪随机序列的级数转换和非转换不相等，则补偿每个累积和以形成至少一个补偿和; 并且将所述补偿和组合以从所述多个补偿和确定相位误差，所述相位误差对应于所述参考相位和所述伪随机序列的相位之间的相位差。