Two-Level Spatial Multiplexing using Hybrid Beamforming Antenna Arrays for mmWave Communications. - Xiaohang Song; Nithin Babu; Wolfgang Rave; Sudhan Majhi; Gerhard P. Fettweis (CoRR, 2016)

Two-Level Spatial Multiplexing Using Hybrid Beamforming for Millimeter-Wave Backhaul. - Xiaohang Song; Wolfgang Rave; Nithin Babu; Sudhan Majhi; Gerhard P. Fettweis (IEEE Trans. Wirel. Commun., 2018)

Energy Efficient Altitude Optimization of an Aerial Access Point. - Nithin Babu; Konstantinos Ntougias; Constantinos B. Papadias; Petar Popovski (PIMRC, 2020)

mmWave Massive MIMO Channel Measurements for Fixed Wireless and Smart City Applications. - Muhammad Haroon Tariq; Ioannis Chondroulis; Panagiotis Skartsilas; Nithin Babu; Constantinos B. Papadias (PIMRC, 2020)

Energy-Efficient 3-D Deployment of Aerial Access Points in a UAV Communication System. - Nithin Babu; Constantinos B. Papadias; Petar Popovski (IEEE Commun. Lett., 2020)

Energy-Efficient Deployment of a Non-Orthogonal Multiple Access Unmanned Aerial System. - Nithin Babu; Constantinos B. Papadias; Petar Popovski (ICC Workshops, 2021)

Federated Learning With a Drone Orchestrator: Path Planning for Minimized Staleness. - Igor Donevski; Nithin Babu; Jimmy Jessen Nielsen; Petar Popovski; Walid Saad (IEEE Open J. Commun. Soc., 2021)

Cost- and Energy-Efficient Aerial Communication Networks With Interleaved Hovering and Flying. - Nithin Babu; Marco Virgili; Constantinos B. Papadias; Petar Popovski; Andrew J. Forsyth (IEEE Trans. Veh. Technol., 2021)

60 GHz Outdoor to Indoor (O2I) Propagation Measurements in a University Campus. - Nikolaos Ntetsikas; Nithin Babu; Muhammad Haroon Tariq; Constantinos B. Papadias; Jinfeng Du; Dmitry Chizhik; Reinaldo A. Valenzuela; Mauricio Rodríguez; Rodolfo Feick (SPAWC, 2022)

Cost-Efficient Deployment of a Reliable Multi-UAV Unmanned Aerial System. - Nithin Babu; Petar Popovski; Constantinos B. Papadias (VTC Fall, 2022)

Fairness Based Energy-Efficient 3D Path Planning of a Portable Access Point: A Deep Reinforcement Learning Approach. - Nithin Babu; Igor Donevski; Alvaro Valcarce; Petar Popovski; Jimmy Jessen Nielsen; Constantinos B. Papadias (CoRR, 2022)

Fairness-Based Energy-Efficient 3-D Path Planning of a Portable Access Point: A Deep Reinforcement Learning Approach. - Nithin Babu; Igor Donevski; Alvaro Valcarce; Petar Popovski; Jimmy Jessen Nielsen; Constantinos B. Papadias (IEEE Open J. Commun. Soc., 2022)

Cost-Efficient Design of an Energy-Neutral UAV-Based Mobile Network. - Marco Virgili; Nithin Babu; Mahshid Javidsharifi; Iman Valiulahi; Christos Masouros; Andrew J. Forsyth; Tamas Kerekes; Constantinos B. Papadias (IEEE Trans. Commun., 2022)

Multi-Cell Coordinated Joint Sensing and Communications. - Nithin Babu; Christos Masouros (ACSSC, 2023)

Energy-Efficient UAV Trajectories: Simulation vs Emulation. - Nithin Babu; Kimon Karathanasopoulos; George Vardoulias; Constantinos B. Papadias (ICASSP Workshops, 2023)

Energy-Efficient Trajectory Design of a Multi-IRS Assisted Portable Access Point. - Nithin Babu; Marco Virgili; Mohammad Ahmad Al-Jarrah; Xiaoye Jing; Emad Alsusa; Petar Popovski; Andrew J. Forsyth; Christos Masouros; Constantinos B. Papadias (IEEE Trans. Veh. Technol., 2023)

Sustainable Wireless Services With UAV Swarms Tailored to Renewable Energy Sources. - Igor Donevski; Marco Virgili; Nithin Babu; Jimmy Jessen Nielsen; Andrew J. Forsyth; Constantinos B. Papadias; Petar Popovski (IEEE Trans. Smart Grid, 2023)

Symbol-Level Precoding for Multi-Cell ISAC. - Nithin Babu; Christos Masouros (JC&S, 2024)

Symbol-Level Precoding for Near-Field ISAC. - Nithin Babu; Alva Kosasih; Christos Masouros; Emil Björnson (IEEE Commun. Lett., 2024)

Precoding for Multi-Cell ISAC: From Coordinated Beamforming to Coordinated Multipoint and Bi-Static Sensing. - Nithin Babu; Christos Masouros; Constantinos B. Papadias; Yonina C. Eldar (IEEE Trans. Wirel. Commun., 2024)