Abstract:
An assisted satellite positioning system based on detecting signals from a number of satellites includes: (a) a mobile receiver and (b) a base station communicating with the receiver over a low-power wireless communication network, the base station providing ephemeris data of a selected number of the satellites, but not all, using a compressed data format. The ephemeris data may include data concerning doppler frequency variations or elevation variations of the selected satellites over a predetermined time interval. The doppler frequency variations and the elevation variations may be represented in the compressed format by coefficients of a polynomial function of time. The polynomial function may be weighted to have lesser relative errors in larger doppler frequencies than lesser doppler frequencies, or to have lesser relative errors in lesser elevations than larger elevations. In one implementation, the low-power wireless communication network -- such as a LoRa network -- that has a range of at least 10 miles.
Abstract:
Die Erfindung betrifft ein Verfahren zur satellitengestützten Ermittlung einer Position eines Fahrzeugs (1), aufweisend die folgenden Schritte: a) Erkennen einer Mehrzahl von Satelliten (2), die zur Positionsermittlung verwendbar sein können, b) Empfangen von Daten, die bewegbare Empfangshindernisse (3) in der Umgebung des Fahrzeugs (1) charakterisieren, c) Ermitteln einer reduzierten Auswahl von Satelliten (2) aus der Mehrzahl von Satelliten (2) anhand der in Schritt b) empfangenen Daten, d) Bestimmen einer Position des Fahrzeugs (1) unter Verwendung von Signalen (4), die von der reduzierten Auswahl von Satelliten (2) ausgesendet wurden.
Abstract:
Some demonstrative embodiments include apparatuses, devices, systems and methods of a Global Navigation Satellite System (GNSS) measurement. For example, an apparatus may include a GNSS receiver including circuitry to receive GNSS signals; and at least one GNSS processor component configured to determine a plurality of configuration hypotheses including different combinations of one of a plurality of different Space Vehicle (SV) sets and one of a plurality of different duty cycle profiles, the GNSS processor component configured to select from the plurality of configuration hypotheses a selected measurement configuration including a selected SV set and a selected duty cycle profile, based at least on an estimated power consumption corresponding to the selected measurement configuration and an estimated position error corresponding to the selected measurement configuration, the GNSS processor component to configure a GNSS measurement by the GNSS receiver using the selected SV set and according to the selected duty cycle.
Abstract:
Die vorliegende Erfindung betrifft ein Navigationsverfahren mit den Schritten: Empfangen (41) eines Satellitennavigationssignals von einem Satellitennavigationssystem; Ermitteln (42) einer Position, basierend auf dem empfangenen Satellitennavigationssignal; Erhalten (45) von Gütedaten, die eine Satellitennavigationssignalgüte in Abhängigkeit einer Ortsinformation angeben; und Korrigieren (46) der ermittelten Position, basierend auf der Satellitennavigationssignalgüte.
Abstract:
An optimum measurement subset with a specified number of elements is generated from a set of input global navigation satellite system (GNSS) measurements. A design matrix and a weight matrix are generated. Values of a set of coefficients corresponding to the set of input GNSS measurements are calculated. The value of a specific coefficient is calculated as the ratio of the change in value of the at least one target parameter resulting from the change in value of the specific input GNSS measurement to the change in value of the sum of squared residuals resulting from the change in value of the specific input GNSS measurement. The optimum measurement subset is selected based at least in part on the values of the set of coefficients.
Abstract:
An apparatus for calculating the location of a receiver in a satellite navigation system, the apparatus being arranged to calculate a location of the receiver by means of an algorithm that utilises an estimate of receiver location and/or an estimate of absolute time, the apparatus being arranged to perform the calculation in such a way as to extend a convergence zone within which the algorithm is capable of generating the correct location for the receiver despite an error in the estimate(s).
Abstract:
An apparatus for calculating the location of a receiver in a satellite navigation system, the apparatus being arranged to calculate a location of the receiver by means of an algorithm that utilises an estimate of receiver location and/or an estimate of absolute time, the apparatus being arranged to perform the calculation in such a way as to extend a convergence zone within which the algorithm is capable of generating the correct location for the receiver despite an error in the estimate(s).
Abstract:
The invention, in some embodiments, relates to the field of global navigation satellite systems, and more particularly to the field of methods and devices for improving accuracy of position determination by receivers of global navigation satellite systems. Some embodiments of the invention relate to methods for generating a three-dimensional (3-D) representation of an urban area by a receiver of a global navigation satellite system using blocked lines of sight to satellites of the system. Additional embodiments of the invention relate to methods for transmitting a three-dimensional (3-D) representation of an urban area by a receiver of a global navigation satellite system for improving calculation of location by the global navigation satellite system receiver.