Summary
This article provides an overview of the current status of wireless communication systems for intelligent transport systems (ITS) and gives an introduction to the IEEE 802.11p standard. We present results from channel sounding experiments between two vehicles and from the vehicle to the infrastructure. Specifically, the non-stationary properties of the fading process in vehicular communication channels are explained. Additionally, we also present numerical simulation results of iterative channel estimation algorithms for the vehicular communication channel. Transmission experiments carried out on Austrians motorways exemplify the challenges faced by the IEEE 802.11p standard. Based on these insights we give an outlook on the future development potential of the IEEE 802.11p standard, such that dependable communication can be guaranteed for ITS systems of the next generation.
Zusammenfassung
Dieser Beitrag gibt einen Überblick zur Funkkommunikation in intelligenten Verkehrssystemen (intelligent transport systems, ITS) und bietet einen Einblick in den IEEE 802.11p Standard. Die Ergebnisse umfangreicher Funkkanalmessungen von Fahrzeug zu Fahrzeug und von Fahrzeug zur Infrastruktur werden vorgestellt und die speziellen nicht stationären Eigenschaften des Schwundprozesses in der Fahrzeugkommunikation erklärt. Neben den Messungen werden numerische Simulationsergebnisse iterativer Kanalschätzmethoden für den Fahrzeugfunkkanal vorgestellt. Zusätzlich durchgeführte Übertragungsexperimente auf Österreichs Autobahnen zeigen den aktuellen Entwicklungsstand des IEEE 802.11p Standards. Basierend auf diesen Erkenntnissen gibt der Beitrag einen Ausblick auf mögliche Weiterentwicklungen des IEEE 802.11p Standards, um eine verlässliche Kommunikation in zukünftigen ITS zu gewährleisten.
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Zemen, T., Czink, N., Bernadó, L. et al. Funkkommunikation für intelligente Verkehrssysteme – Status und Ausblick. Elektrotech. Inftech. 128, 276–281 (2011). https://doi.org/10.1007/s00502-011-0016-6
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DOI: https://doi.org/10.1007/s00502-011-0016-6
Keywords
- Vehicular channel measurements and characterization
- IEEE 802.11p
- Time-variant channel estimation
- Transmission experiments