Intervehicular communication systems under co-channel interference and outdated channel estimates

In this paper, we study the influence of interference in a inter-vehicular communication system. The interfering links are modeled using the multiple scattering radio channel, which fits quite well with experimental data for mobile-to-mobile communications. For this scenario, we derive the signal-to-interference ratio statistics of a single input single output system. Moreover, the analytical results are generalized by taking into account a diversity reception scenario with two well-known schemes, namely selection diversity and maximal ratio combining. In addition, we analytically study the realistic scenario of outdated (imperfect) channel estimates at the receiver side. The outage probability (OP) is considered as the performance metric for all scenarios considered. Based on the numerical evaluation of the derived analytical expressions for the OP, we depict the impact of interference, diversity schemes and outdated estimates on the system's quality of service. Simulation results are also included to validate the analytical results.