Train-position detection device

A train-position detection device that detects a position of a train by using a reception signal which, when a ground-based wireless communication apparatus installed on a ground emits a transmission signal as a radio wave including information on an installation position, is extracted by an in-vehicle wireless communication apparatus mounted on the train from the radio wave that has been received by the in-vehicle wireless communication apparatus, the train-position detection device comprising:

• angle-of-arrival calculation circuitry configured to calculate an angle of arrival of a radio wave on a basis of the reception signal;
• position acquisition circuitry, for the ground-based wireless communication apparatus, configured to acquire information on the installation position of the ground-based wireless communication apparatus, from the reception signal;
• train-position calculation circuitry configured to calculate a train position based on a movement distance of the train;
• correction-amount-to-train-position calculation circuitry configured to calculate a train-position correction amount for correcting the train position calculated by the train-position calculation circuitry, by using the acquired information regarding the installation position, and a plurality of combinations of the angle of arrival of the radio wave and the train position related to a same ground-based wireless communication apparatus, the plurality of combinations calculated at a plurality of times corresponding to when the train runs through a plurality of points on a track road;
• and
• train-position correcting circuitry configured to correct the train position calculated by the train-position calculation circuitry, by using the train-position correction amount calculated by the correction-amount-to-train-position calculation circuitry.