Introduction of Vehicular Communications

Since the end of the last century, the vehicular communication, which is an important technology of the next generation intelligent transportation system (ITS), has received extensive attention. With the help of vehicular communications, many potential advanced applications associated with future vehicles, such as autonomous vehicles as well as intelligent vehicles, can be facilitated and promoted. In this chapter, the overview of vehicular communications is first presented, including introductions of vehicular ad hoc network (VANET) together with cellular vehicle-to-everything (C-V2X). Then, four physical features of actual vehicular communication scenarios are given, and unique vehicular channel characteristics are elaborated. Next, existing vehicular channel models are properly classified according to the modeling methods. Finally, the organization of the monograph is discussed.