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1. 发明授权

US08035558B2 Precise absolute time transfer from a satellite system 有权
标题翻译：精确的绝对时间从卫星系统传输
公开(公告)号：US08035558B2
公开(公告)日：2011-10-11
申请号：US12130893
申请日：2008-05-30
申请人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
发明人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
IPC分类号： G01S19/25 , G01S19/05
CPC分类号： G01S19/23 , G01S19/05 , G01S19/21 , G01S19/256
摘要： Systems and methods according to one or more embodiments are provided for obtaining a precise absolute time using a satellite system. The precise absolute time may be used, for example, as an aid for positioning systems including navigation in attenuated or jammed environments. A method of obtaining precise absolute time transfer from a satellite according to an embodiment comprises: receiving a precision time signal from a satellite, wherein the precision time signal comprises a periodic repeating code; determining a timing phase of the code; receiving additional aiding information; and using the timing phase and the additional aiding information to determine a precise absolute time.
摘要翻译：提供根据一个或多个实施例的系统和方法，用于使用卫星系统获得精确的绝对时间。可以使用精确的绝对时间，例如，作为包括导航在衰减或卡住的环境中的定位系统的辅助。根据实施例的从卫星获得精确的绝对时间传输的方法包括：从卫星接收精确时间信号，其中精度时间信号包括周期性重复码; 确定代码的定时阶段; 接收额外的辅助信息; 并使用定时阶段和附加辅助信息来确定精确的绝对时间。

2. 发明授权

US08179312B2 Precise absolute time transfer from a satellite system 有权
标题翻译：精确的绝对时间从卫星系统传输
公开(公告)号：US08179312B2
公开(公告)日：2012-05-15
申请号：US12833795
申请日：2010-07-09
申请人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
发明人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
IPC分类号： G01S19/37 , G01S19/38
CPC分类号： G01S19/23 , G01S19/05 , G01S19/21 , G01S19/256
摘要： Systems and methods according to one or more embodiments are provided for obtaining a precise absolute time using a satellite system. The precise absolute time may be used, for example, as an aid for positioning systems including navigation in attenuated or jammed environments. A method of obtaining precise absolute time transfer from a satellite according to an embodiment comprises: receiving a precision time signal from a satellite, wherein the precision time signal comprises a periodic repeating code; determining a timing phase of the code; receiving additional aiding information; and using the timing phase and the additional aiding information to determine a precise absolute time.
摘要翻译：提供根据一个或多个实施例的系统和方法，用于使用卫星系统获得精确的绝对时间。可以使用精确的绝对时间，例如，作为包括导航在衰减或卡住的环境中的定位系统的辅助。根据实施例的从卫星获得精确的绝对时间传输的方法包括：从卫星接收精确时间信号，其中精度时间信号包括周期性重复码; 确定代码的定时阶段; 接收额外的辅助信息; 并使用定时阶段和附加辅助信息来确定精确的绝对时间。

3. 发明申请

US20110148701A1 Precise Absolute Time Transfer From A Satellite System 有权
标题翻译：从卫星系统精确绝对时间转移
公开(公告)号：US20110148701A1
公开(公告)日：2011-06-23
申请号：US12833795
申请日：2010-07-09
申请人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
发明人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
IPC分类号： G01S19/25
CPC分类号： G01S19/23 , G01S19/05 , G01S19/21 , G01S19/256
摘要： Systems and methods according to one or more embodiments are provided for obtaining a precise absolute time using a satellite system. The precise absolute time may be used, for example, as an aid for positioning systems including navigation in attenuated or jammed environments. A method of obtaining precise absolute time transfer from a satellite according to an embodiment comprises: receiving a precision time signal from a satellite, wherein the precision time signal comprises a periodic repeating code; determining a timing phase of the code; receiving additional aiding information; and using the timing phase and the additional aiding information to determine a precise absolute time.
摘要翻译：提供根据一个或多个实施例的系统和方法，用于使用卫星系统获得精确的绝对时间。可以使用精确的绝对时间，例如，作为包括导航在衰减或卡住的环境中的定位系统的辅助。根据实施例的从卫星获得精确的绝对时间传输的方法包括：从卫星接收精确时间信号，其中精度时间信号包括周期性重复码; 确定代码的定时阶段; 接收额外的辅助信息; 并使用定时阶段和附加辅助信息来确定精确的绝对时间。

4. 发明申请

US20090315764A1 PRECISE ABSOLUTE TIME TRANSFER FROM A SATELLITE SYSTEM 有权
标题翻译：精确的绝对时间从卫星系统传输
公开(公告)号：US20090315764A1
公开(公告)日：2009-12-24
申请号：US12130893
申请日：2008-05-30
申请人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
发明人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
IPC分类号： G01S1/00 , H04B7/185
CPC分类号： G01S19/23 , G01S19/05 , G01S19/21 , G01S19/256
摘要： Systems and methods according to one or more embodiments are provided for obtaining a precise absolute time using a satellite system. The precise absolute time may be used, for example, as an aid for positioning systems including navigation in attenuated or jammed environments. A method of obtaining precise absolute time transfer from a satellite according to an embodiment comprises: receiving a precision time signal from a satellite, wherein the precision time signal comprises a periodic repeating code; determining a timing phase of the code; receiving additional aiding information; and using the timing phase and the additional aiding information to determine a precise absolute time.
摘要翻译：提供根据一个或多个实施例的系统和方法，用于使用卫星系统获得精确的绝对时间。可以使用精确的绝对时间，例如，作为包括导航在衰减或卡住的环境中的定位系统的辅助。根据实施例的从卫星获得精确的绝对时间传输的方法包括：从卫星接收精确时间信号，其中精度时间信号包括周期性重复码; 确定代码的定时阶段; 接收额外的辅助信息; 并使用定时阶段和附加辅助信息来确定精确的绝对时间。

5. 发明授权

US08296051B2 Generalized high performance navigation system 有权
标题翻译：广义高性能导航系统
公开(公告)号：US08296051B2
公开(公告)日：2012-10-23
申请号：US11749597
申请日：2007-05-16
申请人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
发明人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
IPC分类号： G06F19/00 , H04B7/19
CPC分类号： G01C21/206 , G01S19/02 , G01S19/07 , G01S19/10 , G01S19/11 , G01S19/12 , G01S19/49
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。

6. 发明授权

US07583225B2 Low earth orbit satellite data uplink 有权
标题翻译：低地球轨道卫星数据上行
公开(公告)号：US07583225B2
公开(公告)日：2009-09-01
申请号：US11749652
申请日：2007-05-16
申请人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
发明人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
IPC分类号： G01S5/14 , H04B7/19
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。

7. 发明授权

US07554481B2 Localized jamming of navigation signals 有权
标题翻译：导航信号的本地化干扰
公开(公告)号：US07554481B2
公开(公告)日：2009-06-30
申请号：US11749667
申请日：2007-05-16
申请人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
发明人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
IPC分类号： H04K3/00 , H04B1/66 , G01S3/00
CPC分类号： G01S19/31 , G01S19/015 , G01S19/02 , G01S19/03 , G01S19/07 , G01S19/11 , G01S19/12 , G01S19/21 , G01S19/47 , H04K3/28 , H04K3/42 , H04K3/43 , H04K3/90
摘要： Various approaches to localized jamming of navigation signals are provided. In one embodiment, a navigation signal comprises at least a portion of a low earth orbit (LEO) signal provided by a LEO satellite. A noise source is filtered to provide a plurality of filtered noise signals in a plurality of frequency bands. The navigation signal is spread over a plurality of channels of the LEO signal. The channels are distributed over the frequency bands and a plurality of time slots. A pseudo random noise (PRN) sequence is generated. The filtered noise signals are modulated using the PRN sequence to provide a plurality of modulated noise signals. The modulated noise signals are broadcast over an area of operations to provide a plurality of jamming bursts corresponding to the navigation signal. The jamming bursts are configured to substantially mask the navigation signal in the area of operations.
摘要翻译：提供了导航信号局部干扰的各种方法。在一个实施例中，导航信号包括由LEO卫星提供的低地球轨道（LEO）信号的至少一部分。噪声源被滤波以在多个频带中提供多个滤波的噪声信号。导航信号分散在LEO信号的多个通道上。信道分布在频带和多个时隙上。产生伪随机噪声（PRN）序列。使用PRN序列调制滤波后的噪声信号以提供多个调制噪声信号。调制的噪声信号在操作区域上广播以提供对应于导航信号的多个干扰突发。干扰突发被配置为基本上掩盖操作区域中的导航信号。

8. 发明授权

US07579987B2 Low earth orbit satellite providing navigation signals 有权
标题翻译：低地球轨道卫星提供导航信号
公开(公告)号：US07579987B2
公开(公告)日：2009-08-25
申请号：US11749627
申请日：2007-05-16
申请人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
发明人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
IPC分类号： G01S1/00
CPC分类号： G01S19/31 , G01S19/07 , G01S19/11 , G01S19/12
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）测距覆盖。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。

9. 发明申请

US20080169958A1 LOCALIZED JAMMING OF NAVIGATION SIGNALS 有权
标题翻译：导航信号的本地化JAMMING
公开(公告)号：US20080169958A1
公开(公告)日：2008-07-17
申请号：US11749667
申请日：2007-05-16
申请人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
发明人： Clark E. Cohen , David A. Whelan , Robert W. Brumley , Gregory M. Gutt , Barton G. Ferrell
IPC分类号： G01S7/38
CPC分类号： G01S19/31 , G01S19/015 , G01S19/02 , G01S19/03 , G01S19/07 , G01S19/11 , G01S19/12 , G01S19/21 , G01S19/47 , H04K3/28 , H04K3/42 , H04K3/43 , H04K3/90
摘要： Various approaches to localized jamming of navigation signals are provided. In one embodiment, a navigation signal comprises at least a portion of a low earth orbit (LEO) signal provided by a LEO satellite. A noise source is filtered to provide a plurality of filtered noise signals in a plurality of frequency bands. The navigation signal is spread over a plurality of channels of the LEO signal. The channels are distributed over the frequency bands and a plurality of time slots. A pseudo random noise (PRN) sequence is generated. The filtered noise signals are modulated using the PRN sequence to provide a plurality of modulated noise signals. The modulated noise signals are broadcast over an area of operations to provide a plurality of jamming bursts corresponding to the navigation signal. The jamming bursts are configured to substantially mask the navigation signal in the area of operations.
摘要翻译：提供了导航信号局部干扰的各种方法。在一个实施例中，导航信号包括由LEO卫星提供的低地球轨道（LEO）信号的至少一部分。噪声源被滤波以在多个频带中提供多个滤波的噪声信号。导航信号分散在LEO信号的多个通道上。信道分布在频带和多个时隙上。产生伪随机噪声（PRN）序列。使用PRN序列调制滤波后的噪声信号以提供多个调制噪声信号。调制的噪声信号在操作区域上广播以提供对应于导航信号的多个干扰突发。干扰突发被配置为基本上掩盖操作区域中的导航信号。

10. 发明授权

US07372400B2 Methods and apparatus for a navigation system with reduced susceptibility to interference and jamming 有权
标题翻译：导航系统的干扰和干扰敏感性降低的方法和装置
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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