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1. 发明申请

US20070001899A1 Multiple antenna multi-frequency measurement system 有权
公开(公告)号：US20070001899A1
公开(公告)日：2007-01-04
申请号：US11513542
申请日：2006-08-30
申请人： David Lawrence , Kurt Zimmerman , Miro Samek , Paul Montgomery
发明人： David Lawrence , Kurt Zimmerman , Miro Samek , Paul Montgomery
IPC分类号： G01S5/14
CPC分类号： G01S19/29 , G01S19/32 , G01S19/37 , G01S19/44
摘要： A measurement system and an associated method for determining the positions of multiple antennas to centimeter level accuracy. A plurality of first filters, one filter for each antenna of a plurality of antennas, are each operable to obtain information from a respective one of the plurality of antennas at a primary frequency. A second filter connects with at least one of the plurality of antennas. A processor calibrates biases for the information at the primary frequency with a RF path bias calibration algorithm as a function of an output of the second filter.

2. 发明授权

US06762714B2 Low cost system and method for making dual band GPS measurements 有权
标题翻译：低成本系统和双频GPS测量方法
公开(公告)号：US06762714B2
公开(公告)日：2004-07-13
申请号：US10405702
申请日：2003-04-03
申请人： Clark Cohen , David Lawrence , Stewart Cobb , Paul Montgomery , Miro Samek , Kurt Zimmerman , Michael O'Connor , Walter Melton , Gregory Gutt
发明人： Clark Cohen , David Lawrence , Stewart Cobb , Paul Montgomery , Miro Samek , Kurt Zimmerman , Michael O'Connor , Walter Melton , Gregory Gutt
IPC分类号： G01S514
CPC分类号： G01S19/29 , G01S19/32 , G01S19/37 , G01S19/44
摘要： A low-cost, solid-state position sensor system suitable for making precise code and carrier phase measurements in the L1 and L2 bands of GPS uses an ordinary, low-cost OEM card single-frequency carrier phase tracking C/A code receiver and includes low-cost hardware for sensing the L1 and L2 components of GPS carrier phase. Such measurements are suitable for general use in a variety of fields, including surveying. They are also of sufficient quality to be used in controlling heavy machinery, such as aircraft, farm tractors, and construction and mining equipment. A C/A code continuous tracking GPS receiver is used to produce GPS positioning fixes and real-time L1 carrier phase measurements. This C/A code receiver generates timing and reference information for a digital sampling component. This sampling component processes the L1 and L2 signals from the GPS signals in view. A digital signal processing component coupled to this sampling component processes the raw samples in synchronous, batch form including a step to precisely unwrap the P(Y) carrier phase to baseband. The receiver outputs synchronous, carrier phase measurements associated with each ranging source and signal observable. The synchronous raw carrier phase measurements from the continuous tracking C/A code receiver and the digital sampling component may be used to resolve the cycle ambiguities to each ranging source with respect to a reference station at a known location. Within a short interval typically tens of seconds from initial turn on, continuous, synchronous raw measurements are provided by the GPS receiver and processed into precise position fixes.
摘要翻译：一种低成本的固态位置传感器系统，适用于在GPS的L1和L2频带中进行精确的码和载波相位测量，使用普通的低成本OEM卡单频载波相位跟踪C / A码接收器，包括低成本硬件，用于感测GPS载波相位的L1和L2分量。这种测量适用于各种领域的一般用途，包括测量。它们也具有足够的质量用于控制重型机械，如飞机，农用拖拉机，建筑和采矿设备。使用C / A码连续跟踪GPS接收机来产生GPS定位固定和实时L1载波相位测量。该C / A码接收器产生数字采样分量的定时和参考信息。该采样组件从视觉上处理来自GPS信号的L1和L2信号。耦合到该采样部件的数字信号处理部件以同步批次形式处理原始采样，包括将P（Y）载波相位精确地解包为基带的步骤。接收机输出与每个测距源相关联的同步，载波相位测量和可观测信号。可以使用来自连续跟踪C / A码接收机和数字采样部件的同步原始载波相位测量来相对于已知位置处的参考站来解析每个测距源的周期模糊度。在初始打开的通常几十秒的短时间内，由GPS接收机提供连续的同步原始测量，并将其处理成精确的定位。

3. 发明授权

US06570534B2 Low cost system and method for making dual band GPS measurements 失效
公开(公告)号：US06570534B2
公开(公告)日：2003-05-27
申请号：US10062555
申请日：2002-02-05
申请人： Clark Cohen , David Lawrence , Stewart Cobb , Paul Montgomery , Miro Samek , Kurt Zimmerman , Michael O'Connor , Walter Melton , Gregory Gutt
发明人： Clark Cohen , David Lawrence , Stewart Cobb , Paul Montgomery , Miro Samek , Kurt Zimmerman , Michael O'Connor , Walter Melton , Gregory Gutt
IPC分类号： G01S514
CPC分类号： G01S19/29 , G01S19/32 , G01S19/37 , G01S19/44
摘要： A low-cost, solid-state position sensor system suitable for making precise code and carrier phase measurements in the L1 and L2 bands of GPS uses an ordinary, low-cost OEM card single-frequency carrier phase tracking C/A code receiver and includes low-cost hardware for sensing the L1 and L2 components of GPS carrier phase. Such measurements are suitable for general use in a variety of fields, including surveying. They are also of sufficient quality to be used in controlling heavy machinery, such as aircraft, farm tractors, and construction and mining equipment. A C/A code continuous tracking GPS receiver is used to produce GPS positioning fixes and real-time L1 carrier phase measurements. This C/A code receiver generates timing and reference information for a digital sampling component. This sampling component processes the L1 and L2 signals from the GPS signals in view. A digital signal processing component coupled to this sampling component processes the raw samples in synchronous, batch form including a step to precisely unwrap the P(Y) carrier phase to baseband. The receiver outputs synchronous, carrier phase measurements associated with each ranging source and signal observable. The synchronous raw carrier phase measurements from the continuous tracking C/A code receiver and the digital sampling component may be used to resolve the cycle ambiguities to each ranging source with respect to a reference station at a known location. Within a short interval typically tens of seconds from initial turn on, continuous, synchronous raw measurements are provided by the GPS receiver and processed into precise position fixes.

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