Wang Jiaxing's paper "Coordinated beamforming for UAV-aided millimeter-wave communications using GPML-based channel estimation" was published in IEEE Transactions on Cognitive Communications and Networking (IF=4.341, Chinese Academy of Sciences District 2). The link is as follows:

        Coordinated Beamforming for UAV-Aided Millimeter-Wave Communications Using GPML-Based Channel Estimation | IEEE Journals & Magazine | IEEE Xplore (https://ieeexplore.ieee.org/document/9311842)