Air-to-Ground Channel Characterization for Low-Height UAVs in Realistic Network Deployments

Due to the decrease in cost, size and weight, \acp{UAV} are becoming more popular for general-purpose civil commercial applications. Provision of communication services both user data control messaging by using off-the-shelf terrestrial cellular deployments introduces several technical challenges. In this paper, an approach air-to-ground channel characterization low-height based on extensive measurement campaign is proposed, giving special attention comparison results when a typical directional antenna network used quasi-omnidirectional one considered. Channel characteristics like path loss, shadow fading, root mean square delay Doppler frequency spreads K-factor statistically characterized different suburban scenarios.