公开(公告)号：US11668840B2

公开(公告)日：2023-06-06

申请号：US16998612

申请日：2020-08-20

Applicant: QUALCOMM Incorporated

Inventor： Min Wang ,  Mangesh Chansarkar ,  Ning Luo ,  Gengsheng Zhang ,  David Tuck ,  Bo Zheng ,  Yinghua Yang ,  Han Zhang

IPC: G01S19/41 ,  G01S19/07 ,  G01S19/44

CPC classification number: G01S19/41 ,  G01S19/071 ,  G01S19/072 ,  G01S19/44

Abstract: A Real-Time Kinematic (RTK) solution is provided to mobile devices having multi-constellation, multi-frequency (MCMF) functionality, in which a single base station may have a baseline much farther than traditional base station. To enable this, embodiments account for differences in atmospheric effects between the rover station and base station when determining a GNSS position fix for a mobile device (rover station), allowing for a separate tropospheric delay error for a base station to be determined. Embodiments may use additional satellite measurements for which no RTK correction is available, and may further use orbital clock correction for these additional satellite measurements.

公开(公告)号：US20230082416A1

公开(公告)日：2023-03-16

申请号：US17476308

申请日：2021-09-15

Applicant: QUALCOMM Incorporated

Inventor： David Tuck

IPC: H04W64/00 ,  H04W52/28 ,  H04W4/021

Abstract: A mobile device may be configured to build a power mode database for positioning based on the mobile device's location and associate power mode information, including the operating mode that is requested for positioning and the operating mode that is used for positioning at the location. Additional factors may be associated with the location including contextual information, such as user context, environmental context, and temporal context. The power mode database may be a local database on the mobile device or a remote database, such as a crowdsourced database, accessible via a server. The mobile device may access the power mode database based on a current location and requested operating mode, as well as contextual information, to obtain the actual operating mode to be used for positioning at the location.

公开(公告)号：US11563538B2

公开(公告)日：2023-01-24

申请号：US17098890

申请日：2020-11-16

Applicant: QUALCOMM Incorporated

Inventor： Guttorm Ringstad Opshaug ,  Mangesh Chansarkar ,  David Tuck ,  Jordan Cookman

IPC: H04L5/00 ,  H04W72/00 ,  H04W72/04 ,  H04L27/26

Abstract: Embodiments herein provide for a Low-Frequency (LF) broadcast system that improves on the LORAN-C system to help optimize the use of available spectrum while modernizing the signal structure of broadcast signals. In particular, embodiments can utilize an Orthogonal Frequency Division Multiplexing (OFDM) signal structure to broadcast timing and data signals in successive symbols of an OFDM resource block. Signals can include, for example, comb-1, comb-2, or comb-3 signal structures. Other signal aspects such as muting schemes, modulation, frequency offsets, and the like may vary, depending on desired functionality.