The effect ofthe vehicle size on the V2V radio channel

Vehicle to vehicle (V2V) communication plays a key role in the safety of autonomous vehicles. Therefore, practical tests in many environments are essential. Due to the relatively low altitude of antennas on connected vehicles, any change in the environment is expected to affect the performance of wireless systems from vehicle to vehicle (V2V). This study presents measurements of the impact of vehicle size on the Doppler spreads in V2V radio channel at 5.9 GHz. The measurements were conducted at an irregular three-way intersection where one side includes buildings and the other two sides consist of large open areas surrounded by a row of trees and a metal fence. Vehicles were classified into three groups: small passenger cars (Group A), medium vehicles (Group B), and larger vehicles (Group C). The results demonstrate that the size of the vehicle and the distance between transmitter and receiver are important factors in determining the impact on the V2V link.