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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
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。
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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
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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公开(公告)号：US20080059059A1
公开(公告)日：2008-03-06
申请号：US11749597
申请日：2007-05-16
申请人： Clark Cohen , David Whelan , Robert Brumley , Gregory Gutt , Barton Ferrell
发明人： Clark Cohen , David Whelan , Robert Brumley , Gregory Gutt , Barton Ferrell
摘要： A generalized high performance navigation system is provided using low earth orbit (LEO) satellites. In one embodiment, a method of performing navigation includes receiving a LEO signal from a LEO satellite. The method also includes decoding a navigation signal from the LEO signal. The method further includes receiving first and second ranging signals from first and second ranging sources, respectively. In addition, the method includes determining calibration information associated with the first and second ranging sources. The method also includes calculating a position using the navigation signal, the first and second ranging signals, and the calibration information.
摘要翻译： 使用低地球轨道（LEO）卫星提供广泛的高性能导航系统。 在一个实施例中，执行导航的方法包括从LEO卫星接收LEO信号。 该方法还包括从LEO信号解码导航信号。 该方法还包括分别从第一和第二测距源接收第一和第二测距信号。 此外，该方法包括确定与第一和第二测距源相关联的校准信息。 该方法还包括使用导航信号，第一和第二测距信号以及校准信息来计算位置。
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公开(公告)号：US20050004758A1
公开(公告)日：2005-01-06
申请号：US10720736
申请日：2003-11-24
申请人： David Whelan , Gregory Gutt , Barton Ferrell , Clark Cohen
发明人： David Whelan , Gregory Gutt , Barton Ferrell , Clark Cohen
CPC分类号： G01S19/32 , G01S19/215 , G01S19/235 , G01S19/425
摘要： This invention describes a means for acquiring GPS P/Y code under jamming conditions. It improves jam resistance by augmenting a component of the GPS signal with one from a different satellite system, such as a low earth orbiting (LEO) satellite. The preferred embodiment of this invention employs the Iridium LEO satellite constellation broadcasting in a 10 MHz wide band about 1,621 MHz. A low-cost, integrated Iridium receiver coupled to the GPS receiver employs a single antenna that is capable of receiving both the GPS and Iridium signals together.
摘要翻译： 本发明描述了一种用于在干扰条件下获取GPS P / Y码的装置。 通过使用来自不同卫星系统（例如低地球轨道（LEO））卫星的GPS信号的分量来增加GPS信号的分量来改善阻塞阻力。 本发明的优选实施例使用大约1,621MHz的10MHz宽带中的铱星LEO卫星星座广播。 耦合到GPS接收器的低成本，集成的铱星接收机采用能够一起接收GPS和铱星信号的单个天线。
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公开(公告)号：US20080001819A1
公开(公告)日：2008-01-03
申请号：US11749652
申请日：2007-05-16
申请人： Clark Cohen , David Whelan , Robert Brumley , Gregory Gutt , Barton Ferrell
发明人： Clark Cohen , David Whelan , Robert Brumley , Gregory Gutt , Barton Ferrell
IPC分类号： H04B7/185
CPC分类号： H04B7/1853
摘要： A low earth orbit (LEO) satellite data uplink is provided. In one embodiment, a method of providing a data uplink to a LEO satellite includes determining position information using a LEO signal received from the LEO satellite, a first ranging signal received from a first ranging source, and a second ranging signal received from a second ranging source. The method also includes determining a timing advance parameter using a local clock reference and a LEO satellite clock reference. The method further includes preparing a data uplink signal comprising uplink data to be broadcast to the LEO satellite. In addition, the method includes synchronizing the data uplink signal with the LEO satellite using the timing advance parameter. The method also includes broadcasting the data uplink signal to the LEO satellite.
摘要翻译： 提供了低地球轨道（LEO）卫星数据上行链路。 在一个实施例中，向LEO卫星提供数据上行链路的方法包括使用从LEO卫星接收的LEO信号来确定位置信息，从第一测距源接收的第一测距信号和从第二测距接收的第二测距信号 资源。 该方法还包括使用本地时钟参考和LEO卫星时钟参考确定定时提前参数。 该方法还包括准备包括要广播到LEO卫星的上行链路数据的数据上行链路信号。 另外，该方法包括使用定时提前参数将数据上行链路信号与LEO卫星同步。 该方法还包括向LEO卫星广播数据上行链路信号。
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公开(公告)号：US20080001818A1
公开(公告)日：2008-01-03
申请号：US11749627
申请日：2007-05-16
申请人： Clark Cohen , David Whelan , Robert Brumley , Gregory Gutt , Barton Ferrell
发明人： Clark Cohen , David Whelan , Robert Brumley , Gregory Gutt , Barton Ferrell
IPC分类号： H04B7/212
摘要： Low earth orbit (LEO) satellites are used to provide navigation signals. In one embodiment, a method of providing a LEO signal from a LEO satellite includes providing a plurality of transmit channels over a plurality of transmit slots. The transmit channels comprise a set of communication channels and a set of navigation channels. The method also includes generating a first pseudo random noise (PRN) ranging overlay corresponding to a navigation signal. The method further includes applying the first PRN ranging overlay to a first set of the navigation channels. In addition, the method includes combining the communication channels and the navigation channels into a LEO signal. The method also includes broadcasting the LEO signal from the LEO satellite.
摘要翻译： 低地球轨道（LEO）卫星用于提供导航信号。 在一个实施例中，从LEO卫星提供LEO信号的方法包括在多个发射时隙上提供多个发射信道。 发送信道包括一组通信信道和一组导航信道。 该方法还包括生成对应于导航信号的第一伪随机噪声（PRN）范围覆盖。 该方法还包括将第一PRN测距覆盖应用于第一组导航信道。 此外，该方法包括将通信信道和导航信道组合成LEO信号。 该方法还包括从LEO卫星广播LEO信号。
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公开(公告)号：US20110032144A1
公开(公告)日：2011-02-10
申请号：US12910451
申请日：2010-10-22
申请人： Clark Cohen , Bart Ferrell , Greg Gutt , David Whelan
发明人： Clark Cohen , Bart Ferrell , Greg Gutt , David Whelan
IPC分类号： G01S19/48
摘要： Data from GPS satellites within the field of view of a ground station are retransmitted to LEO satellites, such as Iridium satellites, and cross-linked if necessary before being transmitted to a user. The user is then able to combine the fed-forward data with data received directly from GPS satellites in order to resolve errors due to interference or jamming. Iridium and data aiding thus provides a means for extending GPS performance under a variety of data-impaired conditions because it can provide certain aiding information over its data link in real time.
摘要翻译： 来自地面站视野内的GPS卫星的数据被重新发送到诸如铱星等LEO卫星，并且如果需要，则在传送给用户之前进行交联。 用户然后能够将前馈数据与从GPS卫星直接接收的数据组合，以便解决由于干扰或干扰而导致的错误。 因此，铱星和数据协助提供了在各种数据受损条件下扩展GPS性能的手段，因为它可以实时提供其数据链路上的某些辅助信息。
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公开(公告)号：US07904243B2
公开(公告)日：2011-03-08
申请号：US10873581
申请日：2004-06-22
申请人： Clark Cohen , Bart Ferrell , Greg Gutt , David Whelan
发明人： Clark Cohen , Bart Ferrell , Greg Gutt , David Whelan
IPC分类号： G01C21/00
摘要： Data from GPS satellites within the field of view of a ground station are retransmitted to LEO satellites, such as Iridium satellites, and cross-linked if necessary before being transmitted to a user. The user is then able to combine the fed-forward data with data received directly from GPS satellites in order to resolve errors due to interference or jamming. Iridium and data aiding thus provides a means for extending GPS performance under a variety of data-impaired conditions because it can provide certain aiding information over its data link in real time.
摘要翻译： 来自地面站视野内的GPS卫星的数据被重新发送到诸如铱星等LEO卫星，并且如果需要，则在传送给用户之前进行交联。 用户然后能够将前馈数据与从GPS卫星直接接收的数据组合，以便解决由于干扰或干扰而导致的错误。 因此，铱星和数据协助提供了在各种数据受损条件下扩展GPS性能的手段，因为它可以实时提供其数据链路上的某些辅助信息。
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公开(公告)号：US08019541B2
公开(公告)日：2011-09-13
申请号：US12910451
申请日：2010-10-22
申请人： Clark Cohen , Bart Ferrell , Greg Gutt , David Whelan
发明人： Clark Cohen , Bart Ferrell , Greg Gutt , David Whelan
IPC分类号： G01S19/11
摘要： Data from GPS satellites within the field of view of a ground station are retransmitted to LEO satellites, such as Iridium satellites, and cross-linked if necessary before being transmitted to a user. The user is then able to combine the fed-forward data with data received directly from GPS satellites in order to resolve errors due to interference or jamming. Iridium and data aiding thus provides a means for extending GPS performance under a variety of data-impaired conditions because it can provide certain aiding information over its data link in real time.
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公开(公告)号：US07042392B2
公开(公告)日：2006-05-09
申请号：US10720736
申请日：2003-11-24
CPC分类号： G01S19/32 , G01S19/215 , G01S19/235 , G01S19/425
摘要： This invention describes a means for acquiring GPS P/Y code under jamming conditions. It improves jam resistance by augmenting a component of the GPS signal with one from a different satellite system, such as a low earth orbiting (LEO) satellite. The preferred embodiment of this invention employs the Iridium LEO satellite constellation broadcasting in a 10 MHz wide band about 1,621 MHz. A low-cost, integrated Iridium receiver coupled to the GPS receiver employs a single antenna that is capable of receiving both the GPS and Iridium signals together.
摘要翻译： 本发明描述了一种用于在干扰条件下获取GPS P / Y码的装置。 通过使用来自不同卫星系统（例如低地球轨道（LEO））卫星的GPS信号的分量来增加GPS信号的分量来改善阻塞阻力。 本发明的优选实施例使用大约1,621MHz的10MHz宽带中的铱星LEO卫星星座广播。 耦合到GPS接收器的低成本，集成的铱星接收机采用能够一起接收GPS和铱星信号的单个天线。
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