公开(公告)号：US20170359680A1

公开(公告)日：2017-12-14

申请号：US15272394

申请日：2016-09-21

Applicant: Apple Inc.

Inventor： Brent M. Ledvina ,  Robert W. Mayor ,  Lukas M. Marti ,  David R. Stites ,  Jahshan A. Bhatti ,  Kevin Duffy

IPC: H04W4/02 ,  H04W8/00 ,  H04W24/08 ,  H04B17/318 ,  G06F17/30

CPC classification number: H04W4/02 ,  G06F17/3087 ,  H04B17/318 ,  H04W4/023 ,  H04W8/005 ,  H04W24/08

Abstract: A method for identifying a location of a mobile device is disclosed. The method includes during each of a plurality of instances of time: measuring one or more signal properties of one or more other devices across a time interval; obtaining an identifier from each of the one or more other devices; creating a data point to include the one or more signal properties; and storing the data point in a database. The method further includes analyzing the plurality data points in the database to determine clusters of data points; detecting an event at an input device of the mobile device; measuring one or more new signal properties of one or more of the plurality of other devices at one or more new times; creating a new data point from the one or more new signal properties; and identifying a first cluster corresponding to the new data point.

公开(公告)号：US20170090037A1

公开(公告)日：2017-03-30

申请号：US14871891

申请日：2015-09-30

Applicant: APPLE INC.

Inventor： Brent M. Ledvina ,  Isaac Thomas Miller

IPC: G01S19/29 ,  G01S19/21 ,  H04W88/02

Abstract: Systems, methods and computer program products for determining extended coherent integration intervals based on information about user activity, dynamics and clock stability. Dynamically extending the coherent integration interval increases the signal-to-noise ratio during signal acquisition and tracking, thereby providing a benefit when antenna gain is poor, in weak signal conditions, and when being jammed, or when power needs to be conserved, compared to extending the coherent integration interval for a fixed amount of time.

公开(公告)号：US20160313449A1

公开(公告)日：2016-10-27

申请号：US15174957

申请日：2016-06-06

Applicant: Apple Inc.

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

IPC: G01S19/25 ,  G01S19/26

CPC classification number: G01S19/256 ,  G01S19/13 ,  G01S19/26 ,  G01S19/43 ,  G01S19/46

Abstract: 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.

Abstract translation: 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

Applicant: Apple Inc.

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

IPC: G01S19/13

CPC classification number: G01S19/256 ,  G01S19/13 ,  G01S19/26 ,  G01S19/43 ,  G01S19/46

Abstract: 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.

Abstract translation: 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。