Vehicle Positioning Method of Modern Tram Based on TETRA Communication System

Vehicle positioning system is an important component of traffic dispatch and intelligent control of modern tram. The selection of vehicle positioning scheme and wireless communication scheme decided the performance of the system. According to the characteristics and the requirements of modern tram vehicle positioning, the paper proposed the positioning method of modern tram vehicle by utilizing combined positioning method with satellite positioning and inertial navigation, and the communication scheme between various terminal is realized by Terrestrial Trunked Radio (TETRA) wireless communication system of rail transit, The proposed vehicle positioning scheme can save the cost of the whole project, ensure the precision of the system. Moreover, the vehicle positioning system have the merits of continuity, reliability and maintainability.