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1. 发明申请

US20080001818A1 LOW EARTH ORBIT SATELLITE PROVIDING NAVIGATION SIGNALS 有权
标题翻译：低地球卫星提供导航信号
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
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）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。

2. 发明申请

US20050156782A1 LEO-based positioning system for indoor and stand-alone navigation 有权
标题翻译：用于室内和独立导航的基于LEO的定位系统
公开(公告)号：US20050156782A1
公开(公告)日：2005-07-21
申请号：US10879256
申请日：2004-06-29
申请人： David Whelan , Clark Cohen , Greg Gutt , Barton Ferrell
发明人： David Whelan , Clark Cohen , Greg Gutt , Barton Ferrell
IPC分类号： G01S19/11 , G01S5/02 , G01S5/14 , H04B7/185
CPC分类号： G01S19/26 , G01S5/0263 , G01S19/423
摘要： A method for estimating a precise position of a user device from signals from a low earth orbit (LEO) satellite includes receiving at least one carrier signal at a user device, each carrier signal being transmitted a distinct LEO satellite. The user device processes the carrier signals to obtain a first carrier phase information. The user device recalls an inertial position fix derived at an inertial reference unit. The user device derives a position of the user device based on the inertial position fix and the first carrier phase information.
摘要翻译：一种用于根据来自低地球轨道（LEO）卫星的信号估计用户设备的精确位置的方法包括：在用户设备处接收至少一个载波信号，每个载波信号被传输不同的LEO卫星。用户设备处理载波信号以获得第一载波相位信息。用户设备回收在惯性参考单元处导出的惯性定位。用户设备基于惯性定位和第一载波相位信息导出用户设备的位置。

3. 发明申请

US20080059059A1 GENERALIZED HIGH PERFORMANCE NAVIGATION SYSTEM 有权
标题翻译：通用的高性能导航系统
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
IPC分类号： G01C21/00 , G01C21/20 , H04B7/185
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。

4. 发明申请

US20050004758A1 GPS access system and method 有权
标题翻译： GPS接入系统和方法
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
IPC分类号： G01C21/26 , G01S1/00 , G01S5/14 , G01S19/05 , G01S19/11 , G01S19/21 , G01S19/29 , G01S19/46
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。

5. 发明申请

US20080001819A1 LOW EARTH ORBIT SATELLITE DATA UPLINK 有权
标题翻译：低地球卫星数据上网
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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