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The automotive industry is changing from conventional driving into connected and later on autonomous driving. The key enablers for this conversion are the interaction between the highly precise detection of traffic objects, the accurate localization and communication. The paper on hand conducts this issue through an investigation of the involved sensor systems. Using Vehicle-to-Vehicle communication...
The automotive industry is changing from conventional driving into connected and later on autonomous driving. The fundamental principle of this alteration is communication and exchange of data between vehicles and other kind of traffic objects, for example traffic lights. The knowing about basic conditions from all traffic objects within a close proximity can ensure a more precise reaction of Advanced...
In recent years, wireless sensor networks became popular for a wide range of mainstream applications. Closely related with this evolution, a problem for consumer market use emerged: How to initialize and setup the infrastructure automatically. This paper presents an approach to solve this problem. We present a novel approach how to build infrastructure maps only with anchor-mobile range measurements...
In today's Intelligent Transportation Systems (ITS) accurate positioning information plays an increasing role. The automated registration and counting of passengers in public transportation and ticketing systems are based on the localization of passengers. Techniques leant on wireless sensor networks (WSNs) are an increasingly popular approach for estimating positions in a wide area of applications...
Localization methods play an increasing role in many of today's Intelligent Transportation Systems (ITS). In the context of this work we concentrate on improving the localization accuracy of passengers in public transport vehicles, e.g. as part of automated registration, counting or ticketing systems. In these applications each passenger's ticket could be designed as a mobile wireless sensor node,...
Civil aviation is considering the use of wireless transmission technology for safety-related on-board machine-to-machine communications. The crucial factor is the availability of a globally harmonized radio frequency band with predictable characteristics in terms of signal propagation and interference induced by other users of that frequency band. Currently the International Telecommunication Union...
One of the important aspects in wireless sensor networks is an energy efficient communication protocol to allow battery powered devices with a lifetime of several of years. The most important step therefor is to maximize the time the network nodes staying in power down modes. The possibility to measure distances with an easy-to-use and low cost phase difference of arrival method between network nodes...
In this work we use wireless sensor networks (WSNs) to estimate positions for automated passenger registration with the purpose of an electronic ticketing application in public transport systems. The network is capable of measuring distances between the network's sensor nodes by phase-of-arrival (POA) ranging. In our application, the requirements regarding position accuracy are very demanding, due...
In recent years, indoor positioning has become more and more important for industrial and commercial usage. Advanced approaches using leaky coaxial cables (LCX) not only for radio coverage have been developed. This paper deals with the application of LCXs for indoor localization in a public transport test scenario, run by the Fraunhofer Institute for Transportation and Infrastructure Systems IVI Dresden...
Frequent necessary stops at red traffic signals and related braking and acceleration processes significantly affect the fuel consumption and emission rates of a vehicle. The efficiency-increasing potential (fuel saving potential) of a predictive driver assistance system proposing an intelligent vehicle speed adaption well in advance the intersection is examined by a traffic flow model-based simulation...
We consider problems of wireless sensor network (WSN) — based localisation as a promising technology for highly accurate positioning solutions. Hence, this paper provides an overview on the results of synthetic data testing of an iterative positioning approach. Position estimation in WSNs is based on distance measuring by means of time-of-flight (TOF) ranging techniques. To employ radio frequency...
Phase measurement based time-of-flight ranging techniques are a valid approach for radio-frequency distance measurements using a small relative bandwidth. Step-frequency radar enhances this approach for application on multiple frequencies. In case of presence of narrowband interference, distance calculations are possibly affected depending on the number of frequencies measured and the type of the...
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