Channel Impairments for V2V Communications in ITS Scenarios

This chapter describes different propagation scenarios in V2V communications based on practical Intelligent Transportation System applications. The intention is the study of propagation impairments for modeling purposes. It is important to consider the environmental characteristics of the scenario in order to choose the proper model to evaluate performance. The intention of this chapter is to explore how well current models fit the scenarios and to identify areas of opportunity for new model design. Many devices including sensors, transponders, and communication radios of different kinds co-exist in a typical urban scene. Interference among these devices and electromagnetic coupling with external waves is possible. Therefore, integration of the various technologies is imperative, and conditions for physical interaction of the radio waves needs to be provided. This is critical for the correct function of automatic systems that control safety sensible information. Very strict standard electromagnetic compatibility restrictions and regulations are applied to vehicles. These emissions and immunity tests need to be reengineered in the near future in order to consider new radio devices for communication among vehicles through sensors and transponders.