Realistic Analysis of RIS-Enhanced V2V Communication in the Presence of Environmental Effects and Vehicle Mobility

In this paper, we present a comprehensive analysis of Vehicle-to-Vehicle (V2V) communication systems enhanced by Reconfigurable Intelligent Surfaces (RIS) under realistic rural environments. Using a millimeter-wave (28 GHz) communication model, we focus on the effects of environmental factors such as rain and fog, along with vehicle mobility, on the channel characteristics of V2V communication systems. We specifically analyze the Power Delay Profile (PDP), Channel Impulse Response (CIR), and Frequency Correlation Function (FCF). Simulation results indicate that incorporating RIS into the V2V system enhances signal reception by mitigating signal attenuation and boosting signal strength, especially in the presence of environmental disruptions. However, the analysis also highlights that harsh weather conditions lead to quicker signal attenuation and increased frequency selectivity, particularly at higher frequencies like 28 GHz. Moreover, high vehicle speeds contribute to greater frequency selectivity, causing the FCF to decay more rapidly. These results offer valuable insights into the potential advantages and challenges of deploying RIS in practical V 2 V communication systems.