FIELD: physics, navigation.
SUBSTANCE: invention relates to position finding systems and particularly to systems for approximating position of a device using the signal level of an external medium or external signals. The said result is achieved due to that, variations in the perceived level of radio signals in different positions is used to determine position of a device. In one version an inference procedure is used to process external commercial broadcast signals, evaluate position or probability distribution of positions of the device or training modes and logical inference are used, which are applied to the ranging vector for signal level vectors. Switching to such ranking leads to systems which do not consider absolute signal levels when calculating positions. The invention does not require considerable number of available levels of external signals, thereby providing useful logical inference of position.
EFFECT: accuracy of determining position and reduced requirements for computational resources and data storage requirements.
33 cl, 25 dwg
