TRAIN POSITION DETECTION DEVICE

摘要

A position detection unit (130) calculates relative positions of multiple antennas (110a, 110b) of a mobile radio device (100) to a stationary radio device (200) on the basis of the ratio of Doppler frequencies calculated from multiple reception signals output by a reception unit (120). A train position detection unit (140) calculates a position of a train from the calculated relative positions, the position where the stationary radio device (200) is disposed, and the positions where the multiple antennas (110a, 110b) are disposed on the train.