Patent ID: 8456363

Claim:
A position detection device which detects a position of a moving body in a predetermined environment, comprising: a reception feature quantity generation unit which obtains, from a base station which is disposed in said predetermined environment and receives identification information for identifying a mobile station and a reference station transmitted by radio communication from a mobile station attached to said moving body and a reference station disposed in each area defined in advance in said predetermined environment, said identification information and a reception intensity indicative of an intensity of radio wave as of the reception of said identification information to generate a reception feature quantity represented by a feature vector whose component is said reception intensity which correlates said reception intensity related to each of said mobile station and said reference station with said base station; a position reception feature quantity generation unit which generates a reception feature quantity of each area from the reception feature quantity related to said reference station taking into consideration a difference between reception feature quantities related to said mobile station and said reference station which are generated by said reception feature quantity generation unit; a position reception feature quantity learning unit which learns a reception feature quantity of each area generated by said position reception feature quantity generation unit and records the quantity into a position reception feature quantity storage unit together with position identification information set up in advance for identifying the area; and a position determination unit which searches said position reception feature quantity storage unit for a reception feature quantity most proximate to the reception feature quantity related to the mobile station which is generated by said reception feature quantity generation unit and outputs corresponding position identification information as a position detection result.