Positioning system for a motor vehicle, motor vehicle and method

Abstract

The invention relates to a positioning system for a motor vehicle (12) for determining whether the motor vehicle is in an area (14, 24) covered by a roof element of a building, said positioning system comprising: a receiving unit ( 13), the receiving unit is designed to receive navigation signals (Sig1, Sig2, Sig3, Sig4) of multiple satellites (Sat1, Sat2, Sat3, Sat4) of one or more global satellite navigation systems and obtain corresponding The temporal variation of the signal strength of the navigation signal. An evaluation unit (15) is provided, which is designed to determine the line of sight (LoS1, LoS2, LoS3, LoS4) from the motor vehicle to the corresponding satellite whose navigation signal is received, based on the correspondingly determined line of sight pair The temporal variation of the signal strength of the corresponding navigation signal is evaluated, and by associating the driving movement (x) of the motor vehicle with the corresponding line of sight, it is determined that the motor vehicle has entered the covered area. Furthermore, the invention relates to a motor vehicle (12) having such a positioning system. Furthermore, the invention relates to a corresponding method.

Description

technical field [0001] The invention relates to a motor vehicle locating system for determining whether a motor vehicle is in an area covered by a roof element of a building. Furthermore, the invention relates to a motor vehicle with such a positioning system. Furthermore, the invention relates to a method for determining whether a motor vehicle is located in an area covered by a roof element of a building. Background technique [0002] So far, Global Navigation Satellite System (GNSS) is mainly used for navigation and positioning. In principle, such a system is based on the transit time measurements of different satellites. At least four satellites must be visible at any one time to reliably unambiguously locate. Here, the receiver can determine its own position from the positions of the satellites and the signal propagation times. [0003] To detect roofs, ie roofs, distance-sensing sensors are usually used which are oriented upwards and can thus directly determine whe...

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Problems solved by technology

[0008] However, this method has the disadvantage that it relies on existing road network database correlations and is only suitable for correspondingly extended buildings, such as tunnels, in which the disconnection of the GPS signal and the associated, predetermined signal quality The low (as described in DE 10 2007 020 434 A1) is very suitable for reliable identification of entering tunnels

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