Fundamentals of UAV Communications. Overview / Qingqing Wu, Yong Zeng, Rui Zhang -- A Survey of Air-to-Ground Propagation Channel Modeling for Unmanned Aerial Vehicles / Wahab Khawaja, Ismail Guvenc, David W Matolak, Uwe-Carsten Fiebig, Nicolas Schneckenberger -- UAV Detection and Identification / Martins Ezuma, Fatih Erden, Chethan Kumar Anjinappa, Ozgur Ozdemir, Ismail Guvenc, David Matolak -- Cellular-Connected UAV Communications. Performance Analysis for Cellular-Connected UAVs / M Mahdi Azari, Fernando Rosas, Sofie Pollin -- Performance Enhancements for LTE-Connected UAVs: Experiments and Simulations / Rafhael Medeiros de Amorim, Jeroen Wigard, Istvn Z Kovcs, Troels B Srensen -- 3GPP Standardization for Cellular-Supported UAVs / Helka-Liina Mnen -- Enhanced Cellular Support for UAVs with Massive MIMO / Giovanni Geraci, Adrian Garcia-Rodriguez, Lorenzo Galati Giordano, David Lopez-Perez -- High-Capacity Millimeter Wave UAV Communications / Nuria Gonzalez-Prelcic, Robert W Heath, Cristian Rusu, Aldebaro Klautau -- UAV-Assisted Wireless Communications. Stochastic Geometry-Based Performance Analysis of Drone Cellular Networks / Morteza Banagar, Vishnu V Chetlur, Harpreet S Dhillon -- UAV Placement and Aerial-Ground Interference Coordination / Abhaykumar Kumbhar, Ismail Guvenc -- Joint Trajectory and Resource Optimization / Yong Zeng, Qingqing Wu, Rui Zhang -- Energy-Efficient UAV Communications / Yong Zeng, Rui Zhang -- Fundamental Trade-Offs for UAV Communications / Qingqing Wu, Liang Liu, Yong Zeng, Rui Zhang -- UAV-Cellular Spectrum Sharing / Chiya Zhang, Wei Zhang -- Other Advanced Technologies for UAV Communications. Non-Orthogonal Multiple Access for UAV Communications / Tianwei Hou, Yuanwei Liu, Xin Sun -- Physical Layer Security for UAV Communications / Nadisanka Rupasinghe, Yavuz Yapici, Ismail Guvenc, Huaiyu Dai, Arupjyoti Bhuyan -- UAV-Enabled Wireless Power Transfer / Jie Xu, Yong Zeng, Rui Zhang -- Ad-Hoc Networks in the Sky / Kamesh Namuduri -- Index