Research on the Next Generation Train Autonomous Positioning System Based on Combined Positioning

The current application status and limitations of CBTC (Communication-Based Train Control) train positioning system are introduced, then the train positioning system based on GNSS-INS and the train auxiliary positioning system based on HDMAP and image recognition are analyzed, on the foundation of which a combined positioning system is proposed. This combined positioning system has more active positioning mode, higher redundancy and positioning accuracy.