ULTRA WIDE-LANE (UWL) AMBIGUITY TO IDENTIFY PRECISE POSITIONING ENGINE (PPE) CORRECTION EXCEPTIONS

    公开(公告)号:US20250093526A1

    公开(公告)日:2025-03-20

    申请号:US18467000

    申请日:2023-09-14

    Inventor: Min WANG

    Abstract: A global navigation satellite system (GNSS) device may receive GNSS correction data from a correction data source and obtain a first carrier-phase measurement of a first GNSS signal having a first carrier frequency, and a second carrier-phase measurement of a second GNSS signal having a second carrier frequency. The GNSS device may apply the GNSS correction data to the first carrier-phase measurement, the second carrier-phase measurement, or both. The GNSS device may, subsequent to applying the GNSS correction data, perform a wide-lane (WL) combination of the first carrier-phase measurement and the second carrier-phase measurement and determine whether the GNSS correction data includes an error based at least in part on whether a difference between a float ambiguity value for the WL combination and a closest integer exceeds a threshold value.

    DGNSS/RTK BASE STATION POSITION BIAS DETECTION AND CALCULATION

    公开(公告)号:US20230204796A1

    公开(公告)日:2023-06-29

    申请号:US18001056

    申请日:2020-08-20

    CPC classification number: G01S19/41 G01S19/071

    Abstract: Global Navigation Satellite System (GNSS) receivers can provide more accurate positioning when augmented using Real-Time Kinematic (RTK) or Differential GNSS (DGNSS) corrections. Techniques described herein leverage multi-constellation, multi-frequency (MCMF) measurements taken at a base station at first and second times to generate correction information that can be used to detect and correct a bias (or offset) in the location of the base station. This bias may be detected by a rover station, or by the base station itself.

    PRECISE POINT POSITIONING (PPP)-BASED REAL TIME KINEMATIC (RTK) CORRECTION

    公开(公告)号:US20230152472A1

    公开(公告)日:2023-05-18

    申请号:US17455630

    申请日:2021-11-18

    Inventor: Min WANG

    CPC classification number: G01S19/40 G01S19/43

    Abstract: A device may use Precise Point Positioning (PPP) correction information to generate Real Time Kinematic (RTK) correction information that can be sent to other devices for RTK-based positioning. In particular, according to some embodiments, the first device having access to PPP correction information may obtain the PPP correction information and generate RTK correction information by determining a virtual RTK base station location and generating, based on the PPP correction information, a virtual Multi-Constellation Multi-Frequency (MCMF) measurement corresponding to the determined virtual RTK base station location. This virtual MCMF measurement (and/or data derived therefrom) can then be sent to other devices as RTK correction information.

    Ionosphere Grid History and Compression for GNSS Positioning

    公开(公告)号:US20230017707A1

    公开(公告)日:2023-01-19

    申请号:US17377255

    申请日:2021-07-15

    Abstract: Described are methods, systems, and devices for correcting ionospheric error. In some aspects, a mobile device equipped with a Global Navigation Satellite System (GNSS) receiver is configured to determine a positioning measurement of a GNSS signal. The mobile device is further configured to receive augmentation data from an augmentation system. When augmentation data for a current measurement period is unavailable, the mobile device can obtain augmentation data associated with Total Electron Content (TEC) values (e.g., vertical TEC values) during one or more prior measurement periods. Based on the augmentation data associated with TEC values during one or more prior measurement periods and a pierce point of the received GNSS signal, an ionospheric error in the positioning measurement of the GNSS signal can be determined and corrected.

    VOICE FALLBACK IN 5G NR
    10.
    发明申请

    公开(公告)号:US20210136636A1

    公开(公告)日:2021-05-06

    申请号:US17248099

    申请日:2021-01-08

    Abstract: This disclosure provides systems, methods, apparatuses and computer-readable medium for wireless communication. In some aspects, a user equipment (UE) may receive, from a first base station (BS) associated with a fifth generation New Radio (5G NR) radio access technology (RAT), a command of mobility from the 5G NR RAT to a second RAT. The UE may determine that the command of mobility is for voice fallback. The UE may transmit, to a second BS associated with the second RAT and based at least in part on determining that the command of mobility is for voice fallback, a radio resource control (RRC) connection request communication for attempting to communicatively connect with the second BS for voice fallback.

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