公开(公告)号：US11733393B2

公开(公告)日：2023-08-22

申请号：US17167936

申请日：2021-02-04

Applicant: Albora Technologies Limited

Inventor： Miquel Ribot ,  Adrià Gusi ,  Pau Closas

IPC: G01S19/30 ,  G01S19/24 ,  G01S19/52 ,  G01S19/44 ,  G01S19/35

CPC classification number: G01S19/30 ,  G01S19/243 ,  G01S19/35 ,  G01S19/44 ,  G01S19/52

Abstract: Embodiments of the present invention provide a method, system and computer program product for bit transition enhanced direct position estimation (DPE) from global navigation satellite system (GNSS) signals and includes the reception in a GNSS receiver of signals from multiple, different satellites in multiple satellite constellations adapted for use with the GNSS. The method estimates the GNSS receiver parameters position, velocity, clock bias, clock drift, and optionally and if unknown, the receiver time. The method generates a model of the received GNSS signals that depends on the receiver parameters. Uniquely, the method includes the synchronization of both a primary code and also a secondary code in the received GNSS signal model, in addition to time delays, Doppler shifts, and other relevant parameters for positioning. Finally, if the secondary code of a particular signal is unknown, the method determines the combination of bit transitions that maximizes the optimization problem.

公开(公告)号：US20220244404A1

公开(公告)日：2022-08-04

申请号：US17167936

申请日：2021-02-04

Applicant: Albora Technologies Limited

Inventor： Miquel Ribot ,  Adrià Gusi ,  Pau Closas

IPC: G01S19/30 ,  G01S19/24 ,  G01S19/35 ,  G01S19/44 ,  G01S19/52

Abstract: Embodiments of the present invention provide a method, system and computer program product for bit transition enhanced direct position estimation (DPE) from global navigation satellite system (GNSS) signals and includes the reception in a GNSS receiver of signals from multiple, different satellites in multiple satellite constellations adapted for use with the GNSS. The method estimates the GNSS receiver parameters position, velocity, clock bias, clock drift, and optionally and if unknown, the receiver time. The method generates a model of the received GNSS signals that depends on the receiver parameters. Uniquely, the method includes the synchronization of both a primary code and also a secondary code in the received GNSS signal model, in addition to time delays, Doppler shifts, and other relevant parameters for positioning. Finally, if the secondary code of a particular signal is unknown, the method determines the combination of bit transitions that maximizes the optimization problem.

公开(公告)号：US20220196850A1

公开(公告)日：2022-06-23

申请号：US17127803

申请日：2020-12-18

Applicant: Albora Technologies Limited

Inventor： Miquel Ribot ,  Adrià Gusi ,  Xiao Liu ,  Pau Closas

IPC: G01S19/44 ,  G01S19/09 ,  G01S19/04 ,  G01S19/24

Abstract: A time-free position determination of a roving receiver includes acquiring from a snapshot receiver in a cloud executing process, a snapshot position of the snapshot receiver received by the snapshot receiver for a single epoch from a constellation of global positioning satellites, the snapshot position including a multiplicity of time-free observables. The method additionally includes retrieving into the cloud executing process baseline position data for a fixed receiver received from the constellation and comprising time-referenced observables. Finally, the method includes compositing in the cloud executing process the time-free observables of the snapshot position with the time referenced observables of the baseline position data to produce time and position data for the snapshot receiver.