TY - JOUR TI - Deep Reinforcement Learning for Energy-Efficient Multi-Channel Transmissions in 5G Cognitive HetNets: Centralized, Decentralized and Transfer Learning Based Solutions AU - Anastasios Giannopoulos AU - Sotirios Spantideas AU - Nikolaos Kapsalis AU - Panagiotis Karkazis AU - Panagiotis Trakadas JO - IEEE Access PY - 2021 VL - 9 TODO - null SP - 129358--129374 PB - Institute of Electrical and Electronics EngineersĀ (IEEE) SN - 2169-3536 TODO - 10.1109/access.2021.3113501 TODO - null TODO - null ER -