Position detecting device, method, and program

Position detecting device in advance a plurality of positions received feature amount associated with the position and the acquired reception feature amount using the radio at a known location and reception feature quantity obtained by using the mounting radios in mobile comparing the door to determine the weight that represents the similarity between the received feature quantity of a plurality of positions reception feature quantity for each, and a plurality of position reception feature quantity and the weight, and detects the position of the mounting radios in mobile , a plurality of position reception feature quantity, and the weight, and a position detection result, and outputs seeking index representing the degree of variations of weight.