公开(公告)号：US20240094414A1

公开(公告)日：2024-03-21

申请号：US17947099

申请日：2022-09-17

Applicant: QUALCOMM Incorporated

Inventor： Min WANG ,  Chandrasekhar JAYARAM ,  Satya Swaroop YADATI

IPC: G01S19/44

CPC classification number: G01S19/44

Abstract: An integer ambiguity resolution method includes: receiving SPS signals; determining, for the SPS signals, candidate float ambiguity values indicative of float numbers of carrier signal wavelengths of the SPS signals between respective satellite sources, of the SPS signals, and the mobile device; and performing, in response to failure of an integer ambiguity resolution validation check based on at least a first subset of the candidate float ambiguity values, an integer ambiguity search using at least a second subset of the candidate float ambiguity values; wherein each candidate float ambiguity value of the at least second subset of the candidate float ambiguity values corresponds to a second indication of candidate float ambiguity accuracy that is higher than a first indication of candidate float ambiguity accuracy, if any, corresponding to the at least first subset of the candidate float ambiguity values.

公开(公告)号：US20240337755A1

公开(公告)日：2024-10-10

申请号：US18293347

申请日：2022-04-07

Applicant: QUALCOMM Incorporated

Inventor： Min WANG ,  Ning LUO ,  Yinghua YANG ,  James STEPHEN ,  Han ZHANG ,  Yuxiang PENG ,  Satya Swaroop YADATI ,  Anupam KUMAR

IPC: G01S19/07

CPC classification number: G01S19/07

Abstract: A Precise Positioning Engine (PPE) may use correction information to perform highly accurate Global Navigation Satellite Systems (GNSS) positioning. Transitioning between, or “swapping,” of a first correction information source (e.g., Real-Time Kinematic (RTK) base station) with a second correction information source may be handled using correction information from the first correction information source to update a first state of the PPE. The updated PPE can then be modified by initializing at least ambiguity values of the PPE state. Correction information from the second base can be used to further update the PPE to a second state without a time update at the PPE. By employing this process, embodiments can reduce sudden changes in position estimation due to correction information source swapping, which can often result in resetting of the PPE and a reduced user experience quality.