公开(公告)号：US09618625B2

公开(公告)日：2017-04-11

申请号：US14244828

申请日：2014-04-03

申请人： Apple Inc.

发明人： Isaac T. Miller ,  William J. Bencze ,  Robert W. Brumley ,  Brent M. Ledvina ,  Mark L. Psiaki ,  Thomas J. Holmes ,  Clark E. Cohen

IPC分类号： G01S19/13 ,  G01S19/29

CPC分类号： G01S19/29

摘要： A system and method of continuous carrier wave reconstruction includes a radio navigation receiver that includes one or more processors, memory coupled to the one or more processors, and an input for receiving a signal from a transmitter. The signal has a phase. The one or more processors are configured to obtain phase lock on the received signal, extract first phase information from the received signal, detect a loss in phase lock on the received signal, and extrapolate second phase information while phase lock is lost using a model of the phase. In some embodiments, the one or more processors are further configured to reconstruct the carrier signal based on the first and second phase information. In some embodiments, the one or more processors are further configured to scale the first and second phase information from a first nominal frequency of the received signal to a different second nominal frequency.

公开(公告)号：US20160313449A1

公开(公告)日：2016-10-27

申请号：US15174957

申请日：2016-06-06

申请人： Apple Inc.

发明人： Isaac T. Miller ,  Clark E. Cohen ,  Robert W. Brumley ,  William J. Bencze ,  Brent M. Ledvina ,  Thomas J. Holmes ,  Mark L. Psiaki

IPC分类号： G01S19/25 ,  G01S19/26

CPC分类号： G01S19/256 ,  G01S19/13 ,  G01S19/26 ,  G01S19/43 ,  G01S19/46

摘要： Position, navigation and/or timing (PNT) solutions may be provided with levels of precision that have previously and conventionally been associated with carrier phase differential GPS (CDGPS) techniques that employ a fixed terrestrial reference station or with GPS PPP techniques that employ fixed terrestrial stations and corrections distribution networks of generally limited terrestrial coverage. Using techniques described herein, high-precision PNT solutions may be provided without resort to a generally proximate, terrestrial ground station having a fixed and precisely known position. Instead, techniques described herein utilize a carrier phase model and measurements from plural satellites (typically 4 or more) wherein at least one is a low earth orbiting (LEO) satellite. For an Iridium LEO solution, particular techniques are described that allow extraction of an Iridium carrier phase observables, notwithstanding TDMA gaps and random phase rotations and biases inherent in the transmitted signals.

摘要翻译： 位置，导航和/或定时（PNT）解决方案可以具有以前和传统上与使用固定地面参考站的载波相位差GPS（CDGPS）技术或采用固定地面的GPS PPP技术相关联的精度水平 车站和修正分布网络的普遍有限的地面覆盖。 使用本文描述的技术，可以提供高精度PNT解决方案，而不需要借助于具有固定和精确已知位置的基本接近的地面站。 相反，本文描述的技术利用来自多个卫星（通常为4个或更多个）的载波相位模型和测量，其中至少一个是低地球轨道（LEO）卫星。 对于铱星LEO解决方案，描述了允许提取铱载体相可观察的特定技术，尽管TDMA间隙和随机相位旋转以及传输信号中固有的偏置。

公开(公告)号：US09360557B1

公开(公告)日：2016-06-07

申请号：US13935885

申请日：2013-07-05

申请人： Apple Inc.

发明人： Isaac T. Miller ,  Clark E. Cohen ,  Robert W. Brumley ,  William J. Bencze ,  Brent M. Ledvina ,  Thomas J. Holmes ,  Mark L. Psiaki

IPC分类号： G01S19/13

CPC分类号： G01S19/256 ,  G01S19/13 ,  G01S19/26 ,  G01S19/43 ,  G01S19/46

摘要： Position, navigation and/or timing (PNT) solutions may be provided with levels of precision that have previously and conventionally been associated with carrier phase differential GPS (CDGPS) techniques that employ a fixed terrestrial reference station or with GPS PPP techniques that employ fixed terrestrial stations and corrections distribution networks of generally limited terrestrial coverage. Using techniques described herein, high-precision PNT solutions may be provided without resort to a generally proximate, terrestrial ground station having a fixed and precisely known position. Instead, techniques described herein utilize a carrier phase model and measurements from plural satellites (typically 4 or more) wherein at least one is a low earth orbiting (LEO) satellite. For an Iridium LEO solution, particular techniques are described that allow extraction of an Iridium carrier phase observables, notwithstanding TDMA gaps and random phase rotations and biases inherent in the transmitted signals.

摘要翻译： 位置，导航和/或定时（PNT）解决方案可以具有以前和传统上与使用固定地面参考站的载波相位差GPS（CDGPS）技术或采用固定地面的GPS PPP技术相关联的精度水平 车站和修正分布网络的普遍有限的地面覆盖。 使用本文描述的技术，可以提供高精度PNT解决方案，而不需要借助于具有固定和精确已知位置的基本接近的地面站。 相反，本文描述的技术利用来自多个卫星（通常为4个或更多个）的载波相位模型和测量，其中至少一个是低地球轨道（LEO）卫星。 对于铱星LEO解决方案，描述了允许提取铱载体相可观察的特定技术，尽管TDMA间隙和随机相位旋转以及传输信号中固有的偏置。