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1.发明申请Practical Method for Upgrading Existing GNSS User Equipment with Tightly Integrated Nav-Com Capability 有权升级具有紧密集成Nav-Com功能的现有GNSS用户设备的实用方法公开(公告)号：US20110163913A1
公开(公告)日：2011-07-07
申请号：US12434026
申请日：2009-05-01
申请人： Clark E. Cohen , Todd E. Humphreys , Brent M. Ledvina , William J. Bencze , Mark L. Psiaki , Bryan T. Galusha
发明人： Clark E. Cohen , Todd E. Humphreys , Brent M. Ledvina , William J. Bencze , Mark L. Psiaki , Bryan T. Galusha
摘要： A practical method for adding significant new high-performance, tightly integrated Nav-Com capability to any Global Navigation Satellite System (GNSS) user equipment, such as GPS receivers, requires no hardware modifications to the existing user equipment. In one example, the iGPS concept is applied to a Defense Advanced GPS Receiver (DAGR) and combines Low Earth Orbiting (LEO) satellites, such as Iridium, with GPS or other GNSS systems to significantly improve the accuracy, integrity, and availability of Position, Navigation, and Timing (PNT)—in some cases by three orders of magnitude, to enable high precision GNSS carrier phase observable to be more readily exploited to improve PNT availability—even under interference conditions or occluded environments, and to enable new communication enhancements made available by the synthesis of precisely coupled navigation and communication modes. To achieve time synchronization stability to the required sub-20 ps level between the existing DAGR and a plug-in iGPS enhancement module, a special-purpose wideband reference signal is generated by the iGPS module and coupled to the DAGR via the existing antenna port, so that no hardware modification of the DAGR is required.
摘要翻译： 对任何全球导航卫星系统（GNSS）用户设备（如GPS接收机）增加重要的高性能，紧密集成的Nav-Com功能的实际方法不需要对现有用户设备进行硬件修改。 在一个示例中，iGPS概念被应用于国防高级GPS接收机（DAGR），并将诸如铱星的低地球轨道（LEO）卫星与GPS或其他GNSS系统相结合，以显着提高Position的准确性，完整性和可用性 ，导航和定时（PNT） - 在某些情况下为三个数量级，以使即使在干扰条件或闭塞环境下也可以更容易地利用高精度GNSS载波相位来提高PNT可用性，并实现新的通信增强 通过合成精确耦合的导航和通信模式提供。 为了在现有的DAGR和插件式iGPS增强模块之间达到所需的20ps级别的时间同步稳定性，由iGPS模块生成专用宽带参考信号，并通过现有天线端口耦合到DAGR， 因此不需要硬件修改DAGR。
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公开(公告)号：US20110102259A1
公开(公告)日：2011-05-05
申请号：US12889238
申请日：2010-09-23
IPC分类号： G01S19/21
CPC分类号： G01S19/215
摘要： A method of countering GNSS signal spoofing includes monitoring a plurality of GNSS signals received from a plurality of GNSS signal sources and comparing broadcast data to identify outlying data, which is excluded from generation of a navigation solution defined by the plurality of GNSS signals. The outlying data can be a vestigial signal from a code or carrier Doppler shift frequency. The method includes triggering a spoofing indicator upon identification of the outlying data or other phenomenon. The phenomenon can include a shift in a phase of a measured GNSS navigation data bit sequence or a profile phenomenon of a correlation function resulting from correlation of the incoming GNSS signals with a local signal replica. The profile phenomenon can be the presence of multiple sustained correlation peaks. A nullifying signal can be generated and superimposed over a compromised signal.
摘要翻译： 一种对抗GNSS信号欺骗的方法包括：监测从多个GNSS信号源接收的多个GNSS信号，并比较广播数据以识别从多个GNSS信号定义的导航解的生成中排除的外围数据。 离散数据可以是来自码或载波多普勒频移的残留信号。 该方法包括在识别外部数据或其他现象时触发欺骗指示符。 该现象可以包括测量的GNSS导航数据位序列的相位偏移或由输入的GNSS信号与本地信号副本的相关性产生的相关函数的轮廓现象。 轮廓现象可能是存在多个持续相关峰值。 可以产生无效信号并叠加在受损信号上。
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3.发明授权Practical method for upgrading existing GNSS user equipment with tightly integrated Nav-Com capability 有权使用紧密集成的Nav-Com功能升级现有的GNSS用户设备的实际方法公开(公告)号：US07978130B1
公开(公告)日：2011-07-12
申请号：US12434026
申请日：2009-05-01
申请人： Clark E. Cohen , Todd E. Humphreys , Brent M. Ledvina , William J. Bencze , Mark L. Psiaki , Bryan T. Galusha
发明人： Clark E. Cohen , Todd E. Humphreys , Brent M. Ledvina , William J. Bencze , Mark L. Psiaki , Bryan T. Galusha
摘要： A practical method for adding new high-performance, tightly integrated Nav-Com capability to any Global Navigation Satellite System (GNSS) user equipment requires no hardware modifications to the existing user equipment. In one example, the iGPS concept is applied to a Defense Advanced GPS Receiver (DAGR) and combines Low Earth Orbiting (LEO) satellites, such as Iridium, with GPS or other GNSS systems to significantly improve the accuracy, integrity, and availability of Position, Navigation, and Timing (PNT) and to enable new communication enhancements made available by the synthesis of precisely coupled navigation and communication modes. To achieve time synchronization stability between the existing DAGR and a plug-in iGPS enhancement module, a special-purpose wideband reference signal is generated by the iGPS module and coupled to the DAGR via the existing antenna port.
摘要翻译： 将新的高性能，紧密集成的Nav-Com功能添加到任何全球导航卫星系统（GNSS）用户设备的实用方法不需要对现有用户设备进行硬件修改。 在一个示例中，iGPS概念被应用于国防高级GPS接收机（DAGR），并将诸如铱星的低地球轨道（LEO）卫星与GPS或其他GNSS系统相结合，以显着提高Position的准确性，完整性和可用性 ，导航和定时（PNT），并且通过合成精确耦合的导航和通信模式来实现新的通信增强。 为了实现现有DAGR和插件iGPS增强模块之间的时间同步稳定性，iGPS模块生成专用宽带参考信号，并通过现有天线端口耦合到DAGR。
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公开(公告)号：US20110109506A1
公开(公告)日：2011-05-12
申请号：US12889247
申请日：2010-09-23
IPC分类号： G01S19/29
CPC分类号： G01S19/215
摘要： A method and apparatus for simulating radio-frequency Global Navigation Satellite System (GNSS) signals that are carrier-phase and code-phase aligned with ambient GNSS signals at a user-specified location in the vicinity of the simulator. Such phase alignment allows the synthesized signals to be made to appear substantially the same as the authentic signals to a target receiver, allowing the target receiver to transition seamlessly between authentic and simulated signals. The method is embodied in a device, a phase-coherent GNSS signal simulator, which can be implemented on a digital signal processor for embedded applications.
摘要翻译： 一种用于模拟在模拟器附近的用户指定位置处与载波相位和码相位对准的射频全球导航卫星系统（GNSS）信号的方法和装置。 这种相位对准允许使合成信号看起来与目标接收机的真实信号基本相同，从而允许目标接收机在真实和模拟信号之间无缝地转换。 该方法体现在可以在用于嵌入式应用的数字信号处理器上实现的设备，相位相干GNSS信号模拟器中。
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5.发明申请Assimilating GNSS Signals to Improve Accuracy, Robustness, and Resistance to Signal Interference 审中-公开同步GNSS信号以提高准确度，鲁棒性和抗信号干扰公开(公告)号：US20110068973A1
公开(公告)日：2011-03-24
申请号：US12889242
申请日：2010-09-23
CPC分类号： G01S19/215
摘要： A method for upgrading GNSS equipment to improve position, velocity and time (PVT) accuracy, increase PVT robustness in weak-signal or jammed environments and protect against counterfeit GNSS signals (spoofing). A GNSS Assimilator couples to an RF input of existing GNSS equipment, e.g., a GPS receiver, and extracts navigation and timing information from available RF signals, including non-GNSS signals, or direct baseband aiding, e.g., from an inertial navigation system, frequency reference, or GNSS user. The Assimilator fuses the diverse navigation and timing information to embed a PVT solution in synthesized GNSS signals provided to a GNSS receiver RF input. The code and carrier phases of the synthesized GNSS signals are aligned with those of actual GNSS signals to appear the same at the target receiver input. The Assimilator protects against spoofing by continuously scanning incoming GNSS signals for signs of spoofing, and mitigating spoofing effects in the synthesized GNSS signals.
摘要翻译： 一种用于升级GNSS设备以提高位置，速度和时间（PVT）精度的方法，增加弱信号或卡塞环境中的PVT鲁棒性，并防止伪造的GNSS信号（欺骗）。 GNSS同化器耦合到现有GNSS设备的RF输入，例如GPS接收机，并从可用的RF信号（包括非GNSS信号）或直接基带辅助（例如，惯性导航系统，频率）中提取导航和定时信息 参考或GNSS用户。 同化器融合了多种导航和定时信息，将PVT解决方案嵌入到提供给GNSS接收机RF输入的合成GNSS信号中。 合成的GNSS信号的编码和载波相位与实际GNSS信号的编码和载波相位在目标接收机输入端显示相同。 同化器通过连续扫描输入的GNSS信号以防止欺骗的迹象，并减轻合成的GNSS信号中的欺骗效应，防止欺骗。
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6.发明授权公开(公告)号：US07372400B2
公开(公告)日：2008-05-13
申请号：US11268317
申请日：2005-11-07
申请人： Clark E. Cohen , Robert W. Brumley , Mark L. Psiaki , Gregory M. Gutt , William J. Bencze , Brent M. Ledvina , Barton G. Ferrell , David A. Whelan
发明人： Clark E. Cohen , Robert W. Brumley , Mark L. Psiaki , Gregory M. Gutt , William J. Bencze , Brent M. Ledvina , Barton G. Ferrell , David A. Whelan
IPC分类号： G01S1/00
CPC分类号： H04K3/255 , G01S19/05 , G01S19/11 , G01S19/21 , G01S19/29 , G01S19/43 , G01S19/46 , H04K3/90
摘要： A navigation system provides a significant level of protection against all forms of interference or jamming to GPS in a cost-effective way. The system employs a network of ground reference stations and Low Earth Orbiting (LEO) satellites in conjunction with GPS. A common-view ranging geometry to a GPS satellite is established that links a reference station and a user. A second common-view geometry to a LEO satellite between the same reference station and user pair is also established. The ground stations synthesize real-time aiding signals by making carrier phase measurements of GPS the LEO satellite signals. This aiding information is transmitted via the LEO satellites to the user receiver at high power to penetrate ambient jamming. The user receiver locks onto the carrier phase of the LEO satellite, demodulates the aiding information, then applies the carrier phase measurements and the aiding information to enable extended coherent measurements of the GPS signals. The system thereby recovers the GPS signals that would otherwise be lost to the jamming.
摘要翻译： 导航系统以成本有效的方式提供对GPS的所有形式的干扰或干扰的显着水平的保护。 该系统结合GPS采用地面参考站和低地球轨道（LEO）卫星网络。 建立了连接参考站和用户的GPS卫星的普通视距测距几何。 还建立了在同一参考站和用户对之间的LEO卫星的第二共同视图几何。 地面站通过对GPS的载波相位测量LEO卫星信号来合成实时辅助信号。 该辅助信息通过LEO卫星以高功率传输到用户接收机以穿透环境干扰。 用户接收器锁定到LEO卫星的载波相位，解调辅助信息，然后应用载波相位测量和辅助信息，以实现GPS信号的扩展相干测量。 因此，该系统恢复了否则将被卡住的GPS信号。
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7.发明申请METHODS AND APPARATUS FOR A NAVIGATION SYSTEM WITH REDUCED SUSCEPTIBILITY TO INTERFERENCE AND JAMMING 有权导航系统的方法和设备，具有降低干扰和干扰的可靠性公开(公告)号：US20080062039A1
公开(公告)日：2008-03-13
申请号：US11268317
申请日：2005-11-07
申请人： Clark E. Cohen , Robert W. Brumley , Mark L. Psiaki , Gregory M. Gutt , William J. Bencze , Brent M. Ledvina , Barton G. Ferrell , David A. Whelan
发明人： Clark E. Cohen , Robert W. Brumley , Mark L. Psiaki , Gregory M. Gutt , William J. Bencze , Brent M. Ledvina , Barton G. Ferrell , David A. Whelan
IPC分类号： G01S5/14
CPC分类号： H04K3/255 , G01S19/05 , G01S19/11 , G01S19/21 , G01S19/29 , G01S19/43 , G01S19/46 , H04K3/90
摘要： A navigation system provides a significant level of protection against all forms of interference or jamming to GPS in a cost-effective way. The system employs a network of ground reference stations and Low Earth Orbiting (LEO) satellites in conjunction with GPS. A common-view ranging geometry to a GPS satellite is established that links a reference station and a user. A second common-view geometry to a LEO satellite between the same reference station and user pair is also established. The ground stations synthesize real-time aiding signals by making carrier phase measurements of GPS the LEO satellite signals. This aiding information is transmitted via the LEO satellites to the user receiver at high power to penetrate ambient jamming. The user receiver locks onto the carrier phase of the LEO satellite, demodulates the aiding information, then applies the carrier phase measurements and the aiding information to enable extended coherent measurements of the GPS signals. The system thereby recovers the GPS signals that would otherwise be lost to the jamming.
摘要翻译： 导航系统以成本有效的方式提供对GPS的所有形式的干扰或干扰的显着水平的保护。 该系统结合GPS采用地面参考站和低地球轨道（LEO）卫星网络。 建立了连接参考站和用户的GPS卫星的普通视距测距几何。 还建立了在同一参考站和用户对之间的LEO卫星的第二共同视图几何。 地面站通过对GPS的载波相位测量LEO卫星信号来合成实时辅助信号。 该辅助信息通过LEO卫星以高功率传输到用户接收机以穿透环境干扰。 用户接收器锁定到LEO卫星的载波相位，解调辅助信息，然后应用载波相位测量和辅助信息，以实现GPS信号的扩展相干测量。 因此，该系统恢复了否则将被卡住的GPS信号。
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