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Accurate and reliable positioning of vehicles is a decisive factor for many Intelligent Transportation System (ITS) applications. Under the cooperative environment, the eco-driving at specific scenarios, like intersections, requires vehicle motion state information, which can be provided by Global Navigation Satellite System (GNSS) with an integrity monitoring capability. In order to provide effective...
This paper focuses on GNSS and Inertial Navigation System (INS) integration system based on the loosely coupled (LC) and tightly coupled (TC) schemes. This paper describes the system architechture of two systems and presents the mathematical derivation. In order to evaluate the system performance of the two schemes, a real field experiment was carried in the campus of Beijing Jiaotong University....
At the design stage of GPS (Global Positioning System), there is no provision of real-time integrity information for the standard positioning service (SPS). Meanwhile the precise positioning service (PPS) provides signal in space (SIS) integrity as “lower than 1 × 10−5 probability per hour”. Because PPS access to WAGE (Wide Area GPS Enhancements) rapid ephemeris updates and corrections. But only SPS...
Accurate and safe train position determination is of great importance for railway systems. Additionally, it has become one of the biggest challenges for the Safety-of-Life (SoL) services in railway transport systems using GNSS techniques. The critical performance requirements of these services promote the users to develop safe Train Positioning Systems (TPSs), in which integrity has to be highly concerned...
The future of Intelligent Transportation Systems (ITS) relies on a properly constructed Control Transportation System (CTS) based on a dynamically accurate localisation system. In urban scenarios applications for lane detection, as part of intelligent highways, Global Navigation Satellite Systems (GNSS) receivers provide tangential and perpendicular locations for localisation systems, by means of...
Safe train localization is the key element to provide reliable Position, Velocity and Timing (PVT) information for Automatic Train Operation (ATO), and will enable future applications such as moving block, real-time safety margin estimation for adjacent trains, and many more. The safety-assured train localization under many repeated tests along the test railway line providing acceptable performance...
The usage of filter techniques for position estimation for safety-relevant purposes is an extensive field of research. Depending on the needed application for the Global Navigation Satellite System (GNSS) the state estimation can be achieved by several techniques. State estimation by means of Kalman Filter (KF), as well as Extended Kalman Filter (EKF) and Particle Filter (PF) have been developed and...
In the frame of the development of artificial intelligent (AI) based validation tool for Global Navigation Satellite Systems (GNSS) localisation systems MATLAB Simulink models for all the developed AI-based methodologies have been created. The combination of Artificial Neural Network (ANN) based validation tools with the Mahalanobis Ellipses Filter (MEF) methodology for accuracy-based data evaluation...
Global Navigation Satellite Systems (GNSS) are now widely used in road transportation systems for vehicle navigation, fleet management, satellite-based road traffic monitoring and others, which cover 38% of all the GNSS applications. GNSS can also be used to leverage precise and safe locations in situations with potential harm to humans or damage to a system or environment, which is called safety-related...
The cooperative vehicle localization using DSRC (Dedicated Short Range Communication) is of great significance in many future transportation applications. An overlay function of DSRC has been explored with vehicular communication and it is with great potentials to achieve accurate and reliable vehicle cooperative localization with assistance from the GNSS (Global Navigation Satellite System) receivers...
Global Navigation Satellite Systems (GNSS) are applicable to deliver train locations in real time. This train localization function should comply with railway functional safety standards; thus, the GNSS performance needs to be evaluated in consistent with railway EN 50126 standard [Reliability, Availability, Maintainability, and Safety (RAMS)]. This paper demonstrates the performance of the GNSS receiver...
Global Navigation Satellite Systems (GNSS) are ready for various railway applications, especially the safety-related applications such as train detection and train localisation for the purpose of train control. Every safety-related application for railway should comply with a wide range of railway standards. In order to integrate GNSS into train localisation, a stand-alone satellite-based localisation...
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