DEVICE AND METHOD FOR DETERMINING A GROSS COMPONENT OF A LATITUDE OR LONGITUDE POSITION OF A MOBILE DEVICE

摘要

The invention relates to a device (2) and a method for determining a coarse component of a position in latitude or longitude of a mobile machine. Said position is reconstituted cyclically by combining said coarse component with a corresponding thin component. The device determines the sign of the difference between the fine component for a given acquisition cycle and the fine component for a previous acquisition cycle. The device then calculates the coarse component corresponding to said given acquisition cycle of the thin component, as a function of said sign of said difference and of the sign and the value of the speed of the vehicle. The device and the corresponding method thus make it possible to extrapolate a coarse uncorrected component as a function of the evolution of the fine component and the speed sign of the mobile machine in order to reduce the error associated with the calculation of the position. latitude or longitude.