On the Performance of Terahertz Communications for Vehicular Wireless Networks

Terahertz band appears as a solution to the spectrum scarcity for wireless communications. But, it presents beam pointing error, multipath interference, and atmospheric hurdle challenges. In this paper, we analyse the impacts of these constraints on the communication link in the THz band based on the mobile speeds of an end users in vehicles. We use a generic approach to assess the performance in terms of link failure probability. To that end we use the Mellin transform theorem approach to derive the joint pdf of the channel coefficient h and derive their joint probability density function that would be useful to assess the performance of the mobile vehicular communication link. The performance as a function of speeds is analyzed for pointing error, joint pointing and multipath error, and joint pointing, multi-path, and atmospheric error. The simulated results show severe and rapid degradation at higher speeds of the THz link when the SNIR is below a certain threshold. We then infer the performance with Doppler effects.