Air-To-Air Channel Model For UAVs In Dense Urban Environments

In this paper, a new model for the Air-to-Air (A2A) channel between Unmanned Air Vehicles (UAVs) is derived. It is proposed to cover the line of sight (LOS) and the non-line of sight (NLOS) conditions. Therefore, a new probability of the LOS model for A2A is proposed to consider the effect of the variable height of the transmitting and receiving UAVs in different environments. The model terms are derived based on the 2 Rays reflection model and the Knife-edge diffraction theory. Using the ray-tracing technique, simulationis performed for the A2A channel considering LOS and NLOS scenarios. Then, the model is validated using standard error and confidence interval validation methods. Finally, a comparison between the proposed model and the other A2A models is presented. The proposed model shows better results than the other A2A model by considering the antenna and NLOS excess losses.