Efficient Deployment With Geometric Analysis for mmWave UAV Communications

Unmanned aerial vehicle (UAV) communications with mmWave band is a promising candidate for future communication systems due to its high reliability, excellent flexibility and large bandwidth availability. Nevertheless, the high frequency makes the mmWave UAV communications vulnerable to blockage, which hinders the application of mmWave UAV communications. In this letter, we propose an efficient user scheduling method for mmWave multi-UAVs communications with blockage. First, we explore the angle space channel transmission of mmWave multi-UAVs communications. Then, we propose a geometric analysis method to detect the blockage in the multi-UAVs communication system. Next, we formulate the user scheduling of multi-UAVs communication systems as an optimization problem and propose a greedy user scheduling algorithm to decrease the probability of the blockage and enhance the spectral efficiency of the multi-UAVs communications. Numerical simulation results are provided to verify the effectiveness of the proposed method.