His research interests lie in the fields of Communication Theory, Optimization Theory, and Signal Processing for Wireless Communications, with main focus on wireless powered communications, resource allocation, spectrum sharing, multi-antenna communication systems, cooperative communications, hybrid analog-digital transceivers, and caching.

List of Publications

Ntougias, I. Krikidis, G. K. Papageorgiou, and M. Sellathurai, “Hybrid Precoding for MISO Broadcasting SWIPT Systems: A Stochastic Optimization Approach,” IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2020 (to appear).

K. Papageorgiou et al., “Advanced Dynamic Spectrum 5G Mobile Networks Employing Licensed Shared Access,” IEEE Communications Magazine, vol. 58, no. 7, pp. 21-27, 2020.

Hasslinger, K.Ntougias, F. Hasslinger, and O. Hohlfeld, “General Knapsack Bounds of Web Caching Performance Regarding the Properties of each Cacheable Object,” IFIP Networking Conference (Networking), PP. 821-826, 2020.

Ntougias, C. B. Papadias, G. K. Papageorgiou, G. Hasslinger, and T. B. Sorensen, “Coordinated caching and QoS-aware resource allocation for spectrum sharing,” Springer Wireless Personal Communications, 2020.

B. Papadias, K.Ntougias, and G. K. Papageorgiou, “The role of antenna arrays in spectrum sharing,” in Spectrum Sharing: The Next Frontier in Wireless Networks, pp. 229-256, John Wiley & Sons, 2020.

K. Papageorgiou, M. Sellathurai, K.Ntougias, and C. B. Papadias, “A Stochastic Optimization Approach to Hybrid Processing in Massive MIMO Systems,” IEEE Wireless Communications Letters, vol. 9, no. 6, pp. 770-773, 2020.

Ntougias, C. B. Papadias, G. K. Papageorgiou, and G. Hasslinger, “Spectral coexistence of 5G networks and satellite communication systems enabled by coordinated caching and QoS-aware resource allocation,” 27th European Signal Processing Conference (EUSIPCO), 2019.

Hasslinger, K.Ntougias, F. Hasslinger, and O. Hohlfeld, “Fast and Efficient Web Caching Methods Regarding the Size and Performance Measures per Data Object,” IEEE 24th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD), 2019.

Ntougias, D. Ntaikos, C. B. Papadias, and G. K. Papageorgiou, “Coordinated hybrid precoding and QoS-aware power allocation for underlay spectrum sharing with load-controlled antenna arrays,” IEEE 20th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 2019.

Ntougias, D. Ntaikos, C. B. Papadias, and G. K. Papageorgiou, “Simple cooperative transmission schemes for underlay spectrum sharing using symbol-level precoding and load-controlled arrays,” IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp. 7854-7858, 2019.

Hasslinger, K.Ntougias, F. Hasslinger, and O. Hohlfeld, “Comparing web cache implementations for fast O(1) updates based on LRU, LFU and score gated strategies,” IEEE 23rd International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD), 2018.

Artiga et al., “Shared access satellite-terrestrial reconfigurable backhaul network enabled by smart antennas at mm-wave band,” IEEE Network, vol. 32, no. 5, pp. 46-53, 2018.

Hasslinger, J. Heikkinen, K.Ntougias, F. Hasslinger, and O. Hohlfeld, “Optimum caching versus LRU and LFU: Comparison and combined limited look-ahead strategies,” 16th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt), 2018.

Ntougias, D. Ntaikos, and C. B. Papadias, “Channel-Dependent Precoding for Multiuser Access with Load-Controlled Parasitic Antenna Arrays,” in New directions in wireless communications systems: From mobile to 5G, CRC Press, 2017.

Artiga et al., “Spectrum sharing in hybrid terrestrial-satellite backhaul networks in the Ka band,” European Conference on Networks and Communications (EuCNC), 2017.

Hasslinger, K.Ntougias, F. Hasslinger, and O. Hohlfeld, “Performance evaluation for new web caching strategies combining LRU with score based object selection,” Elsevier Computer Networks, vol. 125, pp. 172-186, 2017.

Ntougias, D. Ntaikos, and C. B. Papadias, “Single-and multiple-RF load controlled parasitic antenna arrays operating at cm-wave frequencies: Design and applications for 5G wireless access/backhaul,” 56th FITCE Congress, pp. 28-34, 2017.

Ntougias, D. Ntaikos, B. Gizas, G. K. Papageorgiou, and C. B. Papadias, “Large load-controlled multiple-active multiple-passive antenna arrays: Transmit beamforming and multi-user precoding,” 25th European Signal Processing Conference (EUSIPCO), pp. 1224-1228, 2017.

Artuso et al., “Enhancing LTE with cloud-RAN and load-controlled parasitic antenna arrays,” IEEE Communications Magazine, vol. 54, no. 12, pp. 183-191, 2016.

Ntougias, D. Ntaikos, and C. B. Papadias, “Coordinated MIMO with single-fed load-controlled parasitic antenna arrays,” IEEE 17th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 2016.

Hasslinger, K.Ntougias, and F. Hasslinger, “Performance and precision of web caching simulations including a random generator for Zipf request pattern,” International GI/ITG Conference on Measurement, Modelling, and Evaluation of Computing Systems and Dependability and Fault Tolerance (MMB/DFT), pp. 60-76, 2016.

Ntaikos, K.Ntougias, B. Gizas, F. Verdou, and C. B. Papadias, “Low-complexity air-interface-agnostic cooperative parasitic multi-antenna spectrum sharing system,” IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN), 2015.

Morgado et al., “Dynamic LSA for 5G networks: The ADEL perspective,” European Conference on Networks and Communications (EuCNC), pp. 190-194, 2015.

Ntougias, N. Taramas, and C. B. Papadias, “Low-feedback cooperative opportunistic transmission for dynamic licensed shared access,” 23rd European Signal Processing Conference (EUSIPCO), pp. 1222-1226, 2015.

Hasslinger, K.Ntougias, and F. Hasslinger, “A new class of web caching strategies for content delivery,” 16th International Telecommunications Network Strategy and Planning Symposium (Networks), 2014.

Hasslinger and K.Ntougias, “Evaluation of caching strategies based on access statistics of past requests,” International GI/ITG Conference on Measurement, Modelling, and Evaluation of Computing Systems and Dependability and Fault Tolerance (MMB/DFT), pp. 120-135, 2014.