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Vehicular channel characterization and its implications for wireless system design and performance

På svenska

Author

  • Christoph Mecklenbräuker
  • Andreas Molisch
  • Johan Kåredal
  • Fredrik Tufvesson
  • Alexander Paier
  • Laura Bernadó
  • Thomas Zemen
  • Oliver Klemp
  • Nicolai Czink

Summary, in English

To make transportation safer, more efficient, and less harmful to the environment, traffic telematics services are currently being intensely investigated and developed. Such services require dependable wireless vehicle-to-infrastructure and vehicle-to-vehicle communications providing robust connectivity at moderate data rates. The development of such dependable vehicular communication systems and standards requires accurate models for the propagation channel in all relevant environments and scenarios. Key characteristics of vehicular channels are shadowing by other vehicles, high Doppler shifts, and inherent non-stationarity, which have major impact on the data packet transmission reliability and latency. This paper provides an overview of the existing vehicular channel measurements in a variety of important environments, and the observed channel characteristics (such as delay spreads and Doppler spreads) therein.We briefly discuss the available vehicular channel models and their respective merits and deficiencies. Finally, we discuss the implications for wireless system design with a strong focus on IEEE 802.11p. On the road towards a dependable vehicular network, room for improvements in coverage, reliability, scalability, and delay are highlighted which require evolutionary improvements in the IEEE 802.11p standard. Multiple antennas

at the on-board units and road-side units are recommended to exploit spatial diversity for increased diversity and reliability. Evolutionary improvements in the PHY and MAC are required to yield dependable systems. Extensive references are provided.

Publishing year

2011

Language

English

Pages

1189-1212

Publication/Series

Proceedings of the IEEE

Volume

99

Issue

7

Document type

Journal article

Publisher

IEEE Press

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • radio channel characterization
  • vehicular communications
  • IEEE 802.11p
  • OFDM
  • MIMO
  • intelligent transportsystems

Status

Published

Research group

  • Radio Systems

ISBN/ISSN/Other

  • ISSN: 0018-9219