公开(公告)号：US09733361B2

公开(公告)日：2017-08-15

申请号：US14480396

申请日：2014-09-08

Applicant: QUALCOMM Incorporated

Inventor： Dominic Gerard Farmer ,  William James Morrison ,  Jie Wu ,  Krishnaranjan Rao ,  Tong Lin

IPC: G01S19/34 ,  G01S19/06 ,  G01S19/24

CPC classification number: G01S19/34 ,  G01S19/06 ,  G01S19/24

Abstract: Techniques for managing power consumption of a Global Navigation Satellite System (GNSS) receiver of a mobile device are provided. These techniques include a method that includes deriving a GNSS search window for the GNSS receiver based on a position uncertainty (PUNC) and a time uncertainty (TUNC), selecting a GNSS search mode based on the GNSS search window and resources available for searching for signals from GNSS satellite vehicles (SVs), wherein an estimated power consumption associated with execution of a GNSS search associated with the GNSS search mode does not exceed a power consumption limit specified for the GNSS receiver conducting the GNSS search using the GNSS search mode, and estimating a position of the mobile device.

公开(公告)号：US10330793B2

公开(公告)日：2019-06-25

申请号：US15477370

申请日：2017-04-03

Applicant: QUALCOMM Incorporated

Inventor： Tong Lin

IPC: G01S19/33

Abstract: Techniques are provided to quickly estimate a temporal shift of a GPS signal based on an analysis of a GLONASS signal. The shift can be a result of applied leap-second adjustments affecting GLONASS signals but not GPS signals. By identifying this shift, GPS and GLONASS signals can be considered together in order to estimate locations. The temporal shift can be determined, e.g., by estimating a separation between a GPS-signal frame feature (e.g., frame onset) and a GLONASS-signal frame feature (e.g., frame onset), or identifying coinciding frame features (e.g., a GPS-signal subframe coinciding with a GLONASS-signal string number). The techniques allow the temporal shift to be estimated based on an analysis of just a portion of the GPS-signal and GLONASS-signal frames, such that a speed of location estimations can be improved.

公开(公告)号：US20170205511A1

公开(公告)日：2017-07-20

申请号：US15477370

申请日：2017-04-03

Applicant: QUALCOMM Incorporated

Inventor： Tong Lin

IPC: G01S19/33

CPC classification number: G01S19/33

Abstract: Techniques are provided to quickly estimate a temporal shift of a GPS signal based on an analysis of a GLONASS signal. The shift can be a result of applied leap-second adjustments affecting GLONASS signals but not GPS signals. By identifying this shift, GPS and GLONASS signals can be considered together in order to estimate locations. The temporal shift can be determined, e.g., by estimating a separation between a GPS-signal frame feature (e.g., frame onset) and a GLONASS-signal frame feature (e.g., frame onset), or identifying coinciding frame features (e.g., a GPS-signal subframe coinciding with a GLONASS-signal string number). The techniques allow the temporal shift to be estimated based on an analysis of just a portion of the GPS-signal and GLONASS-signal frames, such that a speed of location estimations can be improved.

公开(公告)号：US10149261B2

公开(公告)日：2018-12-04

申请号：US14503233

申请日：2014-09-30

Applicant: QUALCOMM Incorporated

Inventor： Dominic Gerard Farmer ,  Jie Wu ,  William James Morrison ,  Tong Lin ,  Krishnaranjan S. Rao

IPC: H04L7/00 ,  H04W56/00 ,  H04J3/06 ,  H04W52/02

Abstract: Disclosed are methods, systems and/or devices to calibrate a network time by acquisition of satellite positioning system (SPS) signals and different instances of time, and time-tagging SPS times according to the network time. In particular, the network time may be calibrated based, at least in part, on a first difference between first and second SPS times obtained at two SPS position fixes and a second difference between corresponding first and second time stamps.

公开(公告)号：US20150123844A1

公开(公告)日：2015-05-07

申请号：US14503185

申请日：2014-09-30

Applicant: QUALCOMM Incorporated

Inventor： Dominic Gerard Farmer ,  Jie Wu ,  William James Morrison ,  Tong Lin ,  Krishnaranjan S. Rao

IPC: G01S19/13 ,  G06F17/30 ,  G01P15/00

CPC classification number: G01S19/256 ,  G01P15/00 ,  G01S19/235 ,  H04W56/0035 ,  H04W56/005 ,  H04W56/0055 ,  H04W56/0065

Abstract: Disclosed are methods, systems and/or devices to calibrate a network time by acquisition of satellite positioning system (SPS) signals and different instances of time, and time-tagging SPS times according to the network time. In particular, the network time may be calibrated based, at least in part, on a first difference between first and second SPS times obtained at two SPS position fixes and a second difference between corresponding first and second time stamps.

Abstract translation: 公开了通过采集卫星定位系统（SPS）信号和不同的时间实例来校准网络时间的方法，系统和/或设备，以及根据网络时间的时间标签SPS时间。 特别地，可以至少部分地基于在两个SPS位置固定处获得的第一和第二SPS时间之间的第一差异和相应的第一和第二时间戳之间的第二差异来校准网络时间。