Infrastructure-less and Robust Localization for Railways
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Real-time train localization with onboard mounted sensors is a basis for future railway applications. In contrast to infrastructure-based train localization with way-side sensors, the onboard train localization uses only train-side sensors and a digital map of the railway tracks. This allows for a significant reduction of cost in installation and maintenance of current signaling technologies. Localization solutions for railways must however provide stringent requirements of accuracy, integrity and availability to ensure its market acceptance. 


In order to meet such requirements, the Institute of Communication and Navigation of DLR works on multisensor localization approaches based on innovative sensor technologies and their suitable design to guarantee robust, accurate and track selective localization in a track map. Such technologies include GNSS, INS, magnetic signature-based localization and the use of digital maps. The solutions under research consider important aspects such the redundancy and resilience of the algorithms that allows the quantification of the achievable tolerable hazard rate (THR), even in challenging scenarios.