based on paging device and method for calibrating a position determination device

Device for calibrating a device for determining position (10) with the following features: a device (51; 61) for comparing a signal model received radio with a plurality of models of radio signal reference, is formed to choose a selected subset from a plurality of signal patterns reference radius by a degree of coincidence between the model radio signal received and a signal model of reference radius respectively of a plurality of models radio signal reference; a device (56; 67) for determining differences in signal strength between the signal model received radio signal and a model reference radio respectively selected subset; and a device (58; 68) for determining a calibration value based on differences in signal strength, and for making available to the calibration value to the device position determination, characterized in that the model radio signal received comprises at least one of an identification of emission of a radio transmitter that can be received and a signal strength of a radio signal received, and that the device (51; 61) for comparison is further made to correlate intensities signal relating to different identifications emission within a model of radio signal received with relative intensities corresponding signal within a model reference radio signal, and thereby to draw conclusions about the degree of matching.