Communication Based Train Control is the trend of the Automatic Train Control technology. For the problem of train positioning, Study the technology of train positioning Based on the Radio Spread Spectrum ,and proposed the method of obtaining transport delay by calculatiing the Error Rate, further ,model and simulate the positioning system.
Background:
The Global Navigation Satellite System (GNSS) has great potentials in next generation railway train control systems. Considering the fail-safe characteristics of train control, the threat from GNSS interference may result in an increasing likelihood of outages of train positioning or even safety risks to the railway system.
Objective:
The interference protection solutions are investigated and demonstrated for achieving the resilient train positioning using GNSS.
Methods:
This paper describes the main types of GNSS interference and investigates the impact on Location Determination Unit (LDU) in the GNSS-based train control system. Specific architectures and solutions for interference detection and protection in both the position domain and measurement domain are presented.
Results:
Interference injection simulations are performed with both the GNSS spoofing and jamming signals, which evaluate the effects of interferences and demonstrate the protection performance of the presented solutions under GNSS attack scenarios.
Conclusion:
The interference protection solutions within both the position domain and measurement domain are effective and significant to mitigate the effects from the GNSS interference, which enables resilient train positioning to achieve the safe train operation.
Simplified GNSS Fusion-based Train Positioning System and its Diagnosis
