Telecommunications and New Technologies Laboratory

The aim of the Informatics Laboratory is to develop and promote research at the Department of Computer, Informatics and Telecommunications Engineering and the International Hellenic University on issues related to local and regional development, research and innovation, production improvement, design of innovative products, evaluation and solution of technological problems, as well as modernization of production processes through design,  the development and application of modern and advanced technological methods. For this purpose, the Laboratory undertakes the implementation of funded research programs in partnership with public and private bodies. It aims to develop innovative products, tools, systems and software in the field of the subjects it treats. At the same time, it promotes the cooperation of the members of its Scientific Staff with other research and technology bodies with the aim of creating stable research nuclei, as well as the gathering of experience and know-how within the framework of teams of researchers. Indirectly, through its activities, it supports the qualitative upgrading of the education provided to the Department and the University.

The Informatics Laboratory serves research and educational activities in the fields of Informatics with emphasis on the development of algorithms, software and digital technologies as well as the evaluation, utilization and learning of relevant technologies and products. Specifically, the main cognitive and non-restrictive subjects included in the activities of the Laboratory are:

• The design and development of modern information systems.
• Research and development of parallel algorithms in problems of high spatial and temporal complexity.
• Research and development of digital signal and image processing, pattern recognition and artificial intelligence and their application in other cognitive fields such as bioinformatics, biomedicine, industrial applications, decision making systems, three-dimensional digitization and poetry modeling, etc.
• The management of large amounts of data and the discovery of hidden patterns of rules and correlations (data analytics) e.g. market trends, business intelligence, website user behavior, etc.
• The Laboratory also aims to enhance the education provided by organizing undergraduate or postgraduate courses in cutting-edge technological products that help certify trainees by their production companies.

Members

• Anastasios Papatsoris, Professor, Laboratory Director
• Hristos Anastassiu, Professor
• Stylianos Tsitsos, Professor
• Dimitrios Efstathiou, Associate Professor
• Dimitrios Manos, Laboratory Associate

PhD Candidates

• Kyriakos Gavouchidis, “Physical-Layer Security Techniques for Distributed Wireless Networks. Attacks and defense techniques for IoT devices in Distributed Wireless Networks”, 2021
• Panagiotis Kyriazidis, “Development of new electronic beam-steering techniques in phased array antennas for applications in 5G mobile communication, satellite communication and radar systems”, 2022
• Eftychios Vlachou, “Security in Internet of Things (IoT): Smart Object Networks”, 2022
• Katerina Giantsidou, “Characterization of the propagating medium and estimation of rain attenuation in millimetre wavelengths in Greece”, 2023

Educational workshops under the responsibility of the Laboratory

• Telecommunications (Optical) Laboratory link 1 link 2
• Mobile Communications Laboratory link
• Laboratory of Telecommunication Systems link
• Microwave Technology Laboratory link

Undergraduate courses under the responsibility of the Laboratory

• Signals and Systems
• Digital Signal Processing
• Teaching and Presentation Techniques
• Telecommunication Systems I
• Optical Communications
• Telecommunication Systems II
• Microwave Communications Engineering
• Mobile Communications
• Wireless Communications
• Telecommunications Policy and Regulatory Environment
• Satellite Communications
• Telecommunication Devices
• Broadband Networks
• Computational Electromagnetics

MSc courses under the responsibility of the Laboratory

• Theory and Technology of Digital Telecommunications
• Internet of Things
• Telecommunications & Networks Lab I
• Broadband Networks and Communication Protocols
• Optical Communications

Education and training actions

• As part of the continuous training of students in the rapidly evolving field of Mobile Communications and Technologies, the Laboratory conducts educational activities for students at the premises of mobile telephony companies (operational centres of Northern Greece Wind, COSMOTE).
• The Laboratory has established a close educational cooperation with the COSMOTE Academy and recently carried out an activity on modern wired and wireless transmission networks. The following link presents the recent educational activity of final year students at COSMOTE Academy.

Current Collaborations of the Laboratory

• With COSMOTE’s Transmission Networks Division (optical and microwave backbone and access networks).
• With Lunar Cargo PC on space communications and technology.
• Memorandum of cooperation with the Union of Radio Amateurs of the Prefecture of Serres for the promotion of emergency communications.

Research Experiments in immediate start

• Installation of millimeter wavelength links at 18GHz and 80GHz and an integrated meteorological station for the assessment of atmospheric factors in radio wave propagation.
• Installation, configuration and transmission of DVB-T2 broadcast signal (the first such broadcast in our country) to assess and evaluate the durability of different combinations of configurations, storage intervals and other COFDM parameters in changing conditions and environments.

Patents

1. Title: Digital Matched Filtering for Signal Estimation in Digital Receiver, (US 6504867), January 7, 2003 | Inventor: Dimitrios Efstathiou, Greensboro, North Carolina, USA | Patent Licensing Company: Analog Devices, Inc. Norwood, MA (USA).
2. Title: Universal Signal Modulators, (US 7180384), February 20th, 2007 | Inventors: Dimitrios Efstathiou, Geensboro, North Carolina, USA and Ken Gentile, Bahama, North Carolina, USA | Patent Licensing Company: Analog Devices, Inc. Norwood, MA (USA).
3. Title: A Digital Re-configurable Core for Multi-mode base-band Transmitter, (US 7248646), July 24, 2007 |Inventor: Dimitrios Efstathiou, Greensboro, North Carolina, USA | Patent Licensing Company: Analog Devices, Inc. Norwood, MA (USA).
4. Title: Microwave transmitter/power synthesizer of dual frequency band, very small size, filed for registration with the Hellenic Industrial Property Organization (O.B.I.) in Oct. 2023.

Selected publications by members of the Laboratory

Books

• A. D. Papatsoris, Telecommunications – A practical approach, Giola Publishing House (forthcoming).
• Atmospheric Modelling and Millimetre Wave Propagation, by G Brussaard and P A Watson with major contributions from L Leyten and A D Papatsoris, Chapman & Hall, ISBN 0-412-56230-8, 1995.
• T. Anastassiu (ed.), Numerical and Analytical Methods in Electromagnetics, Printed Edition of the Special Issue Published in Applied Science, MDPI, Basel, Switzerland, 2021.

Selected Technical Reports

• A. D. Papatsoris, V. Xiromerisiou, A. Politis kai D. Manos, «Study for the television coverage of the Municipalities of the Prefecture of Serres. Phase 2 – Determination of technical parameters of digital TV network, technical specifications of antenna park and equipment costs», Communications Laboratory, Information Technology & Communications Sector, Serres Research and Technology Centre, April 2008.

Selected publications in international peer-reviewed journals during the last decade

• Tsitsos, A. D. Papatsoris, H. Anastassiu, D. Eftstathiou, P. Kyriazidis and A. M. Pashalidou, “Miniturisation of an enhanced performance dual-band microwave power divider”, Far East Journal of Electronics and Communications, Vol. 16, No. 1, pp. 167-188, 2016.
• Papatsoris, A.D. and Varsamis, D., “Utilization of the MF band for Providing Digital Radio Service in Greece”, Journal of Engineering Science and Technology Review, Vol. 9, No. 5, pp.68-71, 2016.
• Efstathiou, K. Gavouchidis, “Overview of Medium Access Control (MAC) Layer Standards for Wireless Body Area Network (WBAN)”, Far East Journal of Electronics and Communications” Vol. 18, Number 4, 2018, Pages 547-568.
• Efstathiou, “Enhancing Physical Layer Security of OFDM Systems”, Far East Journal of Electronics and Communications”, Vol. 18, Number 2, 2018, Pages 317-336
• Efstathiou, “A Collaborative Physical Layer Security Scheme for IoT”, International Journal of Electrical and Computer Engineering (IJECE)”, Vol. 9, No. 3, June 2019, pp. 1924-1934.
• Gavouchidis, D. Efstathiou «A survey on jamming andfriendly jamming techniques”, Far East Journal of Electronics and Communications, Pushpa Publishing House,Prayagraj, India, Volume 25, 2022, Pages 1-36 P-ISSN: 0973-7006, http://dx.doi.org/10.17654/0973700622001.
• Stelios P. Tsitsos, Panayotis Kyriazidis, and Andrew A. P. Gibson, «Efficient Computer-Aided Design of Ceramic Block Duplexers» International Journal of Electronics (δημοσιεύθηκε on-line την 20/3/2013), vol. 101, no. 1, pp. 50-60, 2014.
• I. Kosmanis, I. T. Rekanos, S. P. Tsitsos, «Optimal design of PCS ceramic microwave filters using the differential evolution algorithm», Vol. 31, No. 4, pp. 361-365, Applied Computational Electromagnetics Society (ACES) Journal , 2016.
• Tsitsos, “Advances on microwave ceramic filters for wireless communications” (review paper), International Journal of Electrical and Computer Engineering (IJECE), Vol. 8, No. 5, October 2018, pp. 2762-2772.
• T. Anastassiu, S. Vougioukas, T. Fronimos, C. Regen, L. Petrou, M. Zude and J. Käthner, “A computational model for path loss in wireless sensor networks in orchard environments”, Sensors, 14, doi: 10.3390/s140305118, March 11, 2014, pp. 5118-5135.
• Fromentin-Denozière, J. Simon, A. Tzoulis, F. Weinmann, H. T. Anastassiu, D. Escot Bocanegra, D. Poyatos Martínez, R. Fernández Recio and Adam Zdunek, “Comparative study of miscellaneous methods applied to a benchmark, inlet scattering problem”, IET Radar, Sonar & Navigation, doi: 10.1049/iet-rsn.2014.0200, pp. 1-13.
• C. Politis and H. T. Anastassiu,“Performance Analysis of Resource Sharing During Downlink Multi-User Transmissions in CSMA/ECA Full Duplex WLANs”, Transport and Telecommunication, 2020, volume 21, no. 1, pp. 61–68, DOI 10.2478/ttj-2020-0005, Published Online: 2020-02-27.
• G. Iatropoulos, M.-T. Anastasiadou and H. T. Anastassiu,“Electromagnetic Scattering from Surfaces with Curved Wedges Using the Method of Auxiliary Sources (MAS)”, Appl. Sci. 2020, 10(7), 2309; doi:10.3390/app10072309, 27 March 2020.
• Sotiropoulos, S. Koulouridis, A. Masouras, V. Kostopoulos and H. T. Anastassiu, “Carbon nanotubes films in glass fiber polymer matrix forming structures with high absorption and shielding performance in X-Band”, Composites Part B, 217 (2021) 108896.
• Papachristou and H. T. Anastassiu, “Application of 3D Virtual Prototyping Technology to the Integration of Wearable Antennas into Fashion Garments”, Technologies, 10, 62, https://doi.org/10.3390/technologies10030062 , 17 May 2022.
• Mastorakis, P. J. Papakanellos, H. T. Anastassiu and N. L. Tsitsas, “Analysis of Electromagnetic Scattering from Large Arrays of Cylinders via a Hybrid of the Method of Auxiliary Sources (MAS) with the Fast Multipole Method (FMM)”, Mathematics, 10, 3211, https://doi.org/10.3390/math10173211, 5 Sept. 2022.

Selected papers in peer-reviewed conferences over the last decade

• Papatsoris and D. Varsamis, «Utilization of the MF band for Providing Digital Radio Services in Greece», 3^rd Panhellenic Conference on Electronics & Telecommunications, 8-9 May, Ioannina, Greece, 2015.
• D. Papadopoulos, D. Tsipouridou, D. Efstathiou, Fotini-Niovi Pavlidou «Enhancing Transmission Security for Multimedia Applications«, Proceedings of Panhellenic Conference on Informatics, PCI’2015, pp. 150-155, Athens, Greece, October 1-3, 2015.
• Efstathiou, G. Papadopoulos, D. Tsipouridou, F.N. Pavlidou, «Enhancement of Transmission Security for OFDM Based Systems«, IEEE Symposium on Computers and Communications, 3-6 July 2017, Heraklio, Kriti, Greece, 2017.
• Efstathiou, “IoT Physical Layer Security Enhancement”, Proceedings of GIIS 2018, October 23-25, 2018 Thessaloniki, Greece, 2018.
• Tsitsos, D. Efstathiou, P. Kyriazidis, and A. A. P. Gibson, “Design of an ultra wide-band power divider with harmonics suppression”, 6th International Conference ‘From Scientific Computing to Computational Engineering’, 6th IC-SCCE, Athens, Greece, 9-12 July, 2014.
• Tsitsos, H. T. Anastassiu and A. Papatsoris, “3-Way Wide-Band Planar Power Divider”, 22nd Telecommunications Forum, TELFOR 2014, Belgrade, Serbia, November 25-27, 2014.
• G. Iatropoulos, M.T. Anastasiadou and H. T. Anastassiu,‘Application of the Method of Auxiliary Sources (MAS) to the Analysis of Electromagnetic Scattering from Dielectric Surfaces with Curved Wedges’, 13th International Conference on Communications, Electromagnetics and Medical Applications (CEMA’18), Sofia, Bulgaria, October 18 -20, 2018, pp. 12-16.
• J. Mastorakis, P. J. Papakanellos, H. T. Anastassiu, and N. L. Tsitsas, “Hybridization of the Method of Auxiliary Sources (MAS) with the Fast Multipole Method (FMM) for Scattering from Large Arrays of Cylinders”, 41st PIERS (PhotonIcs & Electromagnetics Research Symposium) 2019, Rome, Italy, June 17–20, 2019 (second place award in student contest)
• C. Politis, C. S. Hilas and H. T. Anastassiu,“On the Performance of DCF in Full Duplex WLANs with Hidden Terminals”, 2022 IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom), Sofia, Bulgaria, 6-9 June 2022.
• Hatzitolios and H. T. Anastassiu, “A Simple, yet Efficient Computational Model for Electromagnetic Propagation among Sensors in Corn Fields”, International Conference on Electronics, Engineering Physics and Earth Science (EEPES 2023), Kavala, Greece, June 21-23, 2023 (best paper award)
• C. Politis, H. T. Anastassiu and C. S. Hilas, “A Game Theoretic Approach to Enhance DCF Performance in Full Duplex Ad-hoc WLANs”, International Conference on Modern Circuits and Systems Technologies (MOCAST) on Electronics and Communications, Athens, Greece, 28 – 30 June 2023.

Invited Speeches and Public Interventions

• A. D. Papatsoris, «Digital Television and Regional Stations», 1^st Panhellenic Conference of Regional TV Stations, 1^st Panhellenic Conference of Regional TV Stations, EPEK (Greek Association of Regional Channels) and TEP (Hellenic Regional Television), Divani CARAVEL Hotel, 6 July 2010.
• A. D. Papatsoris, «Digital Dividend and Spectrum Management», at the Workshop entitled Digital Terrestrial Television: regulations and malfunctions, Audiovisual Media Institute (ΙΟΜ), Press Centre of the General Secretariat of Communications, 30 November 2010.
• A. D. Papatsoris, «Green communications in 5th generation mobile networks», at the Workshop entitled Go GREEN, Department of Environment of the Municipality of Serres and the Built Environment Research Laboratory (Be Lab), Serres Campus, International Hellenic University, 5 June 2019.

Selected diploma theses

• Efthymiadou Argyro, Hollow core optical fiber applications in 5G networks, MSc in Communication and Information Systems, March 2022.
• Evangelidou Giouli, Development of Radio Frequency Assignment Criteria for the Land-based Fixed Service in the 12,75GHz-13,25GHz band, Four-year undergraduate program, May 2016.
• Anastasiadou Minodora-Tatiani and Iatropoulos Vissarion, Application of the Method of Auxiliary Sources-MAS in the Analysis of Electromagnetic Scattering from Dielectric, Locally Non-Smooth Surfaces, TEI of Central Macedonia/Serres, 2017.
• Plousiou Anastasia and Apatsidis Aimilios, Software development for the solution of integral equations by the Method of Potentials–MoM, TEI of Central Macedonia/Serres, 2018.
• Agourzenidou Eleni, Polygyrinou Maria and Poultidou Valentina, Electromagnetic Scattering from a Pair of Metallic Circular Cylinders, TEI of Central Macedonia/Serres, 2018.
• Amanatidis Dimitrios, Mathematical models and simulation of arms competition, International Hellenic University, 2021.
• Giannas Georgios, Analysis of electromagnetic radiation from an antenna mounted on the body of a racing car, International Hellenic University, 2022.