Error and integrity evaluation via motion prediction

    公开(公告)号:US12111403B2

    公开(公告)日:2024-10-08

    申请号:US17620543

    申请日:2020-06-17

    摘要: Error and integrity evaluation during a position determination, includes: recording position values (P−N, P−2, P−1) and calculating clock errors of a receiver via time-discrete runtime measurements by a satellite navigation system; recording a first pseudo-distance at a later time via time-discrete runtime measurement by the satellite navigation system; extrapolating a position value (P′0) of the receiver at the later time and extrapolating a clock error of the receiver at the later time; establishing a distance (r′0) between the extrapolated position value (P′0) of the receiver and the position of a satellite (S0) of the satellite navigation system at the later time, wherein a quality measure for the usability of the position determination with the satellite is obtained by forming a second pseudo-distance based on the sum of the established distance (r′0) and the extrapolated clock error at the later time and comparing the second pseudo-distance with the first pseudo-distance.

    CROWD SOURCED BEACON ALTITUDES FOR 3D POSITIONING

    公开(公告)号:US20240288528A1

    公开(公告)日:2024-08-29

    申请号:US18628496

    申请日:2024-04-05

    摘要: In various embodiments, crowd sourcing techniques are provided to determine beacon altitudes that may then be used in 3D positioning of UE. Some techniques may crowd source beacon altitudes based on global navigation satellite system (GNSS) position fixes obtained by UE. Other techniques may crowd source beacon altitudes based on uncalibrated pressure measurements obtained by UE. Still other techniques may combine beacon altitude crowd-sourcing and pressure sensor calibration on UE. Such techniques may make inferences based on line of sight (LOS) between UE and beacons, determined using signal strength, connection status, and/or timing measurement. The techniques may be implemented separately, or as part of a combined system that determines beacon altitudes in diverse manners. Once beacon altitudes are known, that may be used to determine 3D positions of the UE (e.g., by trilateration, multilateration or other positioning techniques).

    Geolocation-based beamforming for drone communication

    公开(公告)号:US11962375B2

    公开(公告)日:2024-04-16

    申请号:US16416642

    申请日:2019-05-20

    申请人: Yan Li

    发明人: Yan Li

    IPC分类号: H04B7/06 B64C39/02 G01S19/45

    摘要: System and method of wireless communication in UAV systems that uses geolocation-based beamforming. The antenna array on the transmit device is first calibrated to compensate the random phase errors of the antenna. During operation, the geolocations of the UAV and its remote control and the rotational position of the transmit device are used to determine a beamforming direction. A beamforming vector is selected based on the beamforming direction. The beamformer on the transmit device then beam forms the antenna array such that data or other information can be transmitted to the receive device in the beamforming direction.

    System for selecting the tracking technique for tracking a user device based on user device proximity to location beacons

    公开(公告)号:US11835635B2

    公开(公告)日:2023-12-05

    申请号:US17511941

    申请日:2021-10-27

    申请人: Intrex

    发明人: Ted Tzirimis

    IPC分类号: G01S19/48 G01S19/46 G01S19/45

    CPC分类号: G01S19/48 G01S19/46 G01S19/45

    摘要: A computer-implemented method includes: selecting between a first location tracking technique and a second location tracking technique used to track a user device. The selecting includes: receiving a communications signal emitted from the user device via one or more network devices; selecting the first tracking location technique based on receiving the communications signal; determining that the user device is outside communications range of the one or more network devices; and selecting the second tracking location technique based on the determining that the user device is outside communications range of the one or more network devices. The method further includes monitoring location information of the user device based on the selecting between the first location tracking technique and the second location tracking technique; and storing or outputting the location information.