Publications

A Coupled Multi-Stage Hybrid Framework for BER Prediction and Beam Angle Optimization in Massive MIMO Systems: Combining Classical Regression with Coupled Deep Learning Approaches

Ioannou, I.; Georgiades, M.; Nagaradjane, P.; Khalifeh, A.; Christophorou, C.; Raspopoulos, M.; Vassiliou, V · in Network 2026, 6,35

Wi-Fi FTM Versus UWB for 3D Indoor Positioning

M. Raspopoulos, I.Ioannou and N.Paspallis · IEEE Computers, Software, and Applications Conference (COMPSAC 2026), Madrid, Spain, July 7-10, 2026, [Accepted - To be presented]

VRadioSim: A GPU-Based Ray Tracing Simulator for Real-Time Wireless Propagation Visualisation in Virtual Reality

L. Nisiotis and M. Raspopoulos · IEEE Computers, Software, and Applications Conference (COMPSAC 2026), Madrid, Spain, July 7-10, 2026, [Accepted - To be presented]

Seamless Indoor Navigation: Leveraging AI Computer Vision and GPS Spoofing for UGV Autonomy

S. Ioannou, M. Raspopoulos and S. Peng · The 12th 2026 International Conference on Control, Decision and Information Technologies (CoDIT 2026), Bari, Italy, July 13-16, 2026, [Accepted - To be presented]

DRL-based Position-Aided Beam-Management\\in RIS-Enabled Indoor Environments

I. Ioannou, M. Raspopoulos, M. Georgiades, C. Christophorou, A. Khalifeh and V. Vassiliou · International Workshop on Intelligent Systems for the Internet of Things in The 22nd Annual International Conference on Distributed Computing in Smart Systems and the Internet of Things (DCOSS-IoT 2026), Reykjavik, Iceland, June 22-24, 2026, [Accepted - To be presented]

Adaptive active-defense hardening of ML-based NIDS against RL-driven adversaries: A comparative analysis with static defenses

I. Ioannou, C. Christophorou, A. Andreou, M. Raspopoulos, C. Mavromoustakis, V. Vassiliou, F. Granelli · in Journal of Information Security and Applications, Volume 100,2026,104496,ISSN 2214-2126

The Development of a Virtual-Reality Wireless Signal Propagation Simulator in Unreal Engine: A Device and Performance Testing

L. Nisiotis, A. Anikina and M. Raspopoulos · in IT Professional, vol. 28, no. 1, pp. 44-50, Jan.-Feb. 2026

Adaptive Multi-Stage Hybrid Localization for RIS-Aided 6G Indoor Positioning Systems: Combining Fingerprinting and Geometric Methods with Condition-Aware Fusion

Ioannou, I.; Vassiliou, V.; Raspopoulos, M · Sensors 2026, 26, 1084

Topology-Aware Deep Reinforcement Learning for RIS Beamforming: A GNN-PPO and Risk-Sensitive Evaluation

I. Ioannou, P. Nagaradjane, M. Raspopoulos, V. Papadopoulou-Lesta, C. Christophorou, Ala' Khalifeh, and V. Vassiliou · 2025 Asian Conference on Communication and Networks (ASIANComNet 2025), [Presented - To be published]

A Deep Q-Network (DQN) Framework for Joint Optimization of EV Charging Station Placement and Vehicle Routing

I. Ioannou, C. Christophorou, C. Politi, S. Denazis, M. Raspopoulos and V. Vassiliou · 2025 IEEE International Smart Cities Conference (ISC2), Patras, Greece, 2025, pp. 1-6

Access Point Selection and Localization for Cluster-Based Realization of a Device-to-Device Cell-Free 6G Communications Network

I. Ioannou, M. Raspopoulos, P. Nagaradjane; C. Christophorou, A. Gregoriades, V. Vassiliou · IET Communications 19, no. 1 (2025): e70096

mmWave-based Crowd Sensing for Metaverse Applications

M. Raspopoulos, I. Ioannou, L. Nisiotis · 2025 IEEE International Symposium on Emerging Metaverse (ISEMV), Honolulu, HI, USA, 2025, pp. 46-54

Enhancing Digital Heritage Experiences: Evaluating Fine-Tuned LLM Integration within a Cyber-Physical-Social Virtual Museum System

L. Nisiotis, N. Markov, C. Nikolaou, A. Hadjiliasi, M. Raspopoulos · 2025 IEEE International Symposium on Emerging Metaverse (ISEMV), Honolulu, HI, USA, 2025, pp. 17-26

3D millimeter-Wave Multi-Target Sensing

M. Raspopoulos, A. Sesyuk, and I. Ioannou · 2025 International Conference on Indoor Positioning and Indoor Navigation (IPIN), Tampere, Finland, 2025, pp. 1-6

Implementing a Cell-Free 6G Distributed AI Network With the Use of Deep ML Under a Traditional Multi-Cell Mobile Network

I. Ioannou, A. Gregoriades, C. Christophorou, M. Raspopoulos and V. Vassiliou · 2025 5th IEEE Middle East and North Africa Communications Conference (MENACOMM), Byblos, Lebanon, 2025, pp. 1-8

Optimization of the D2D Topology Formation Using a Novel Two-Stage Deep ML Approach for 6G Mobile Networks

I. Ioannou, M. Raspopoulos, P. Nagaradjane, C. Christophorou, A. Khalifeh and V. Vassiliou · 2024 Asian Conference on Communication and Networks (ASIANComNet), Bangkok, Thailand, 2024, pp. 1-9

3D millimeter-Wave Sensing vs Ultra-Wideband Positioning

A. Sesyuk, S. Ioannou and M. Raspopoulos · 2024 14th International Conference on Indoor Positioning and Indoor Navigation (IPIN), Kowloon, Hong Kong, 2024, pp. 1-6

Exploring Gaming Technologies, Digital Twins, and VR to Visualise Wireless Propagation Simulations

L. Nisiotis, A. Anikina and M. Raspopoulos · 2024 IEEE 48th Annual Computers, Software, and Applications Conference (COMPSAC), Osaka, Japan, 2024, pp. 656-661

Revolutionising IoT Network Security By Assessing ML Localisation Techniques Against Jamming Attacks

I. Ioannou, M. Savva, M. Raspopoulos, C. Christophorou and V. Vassiliou · 2024 22nd Mediterranean Communication and Computer Networking Conference (MedComNet), Nice, France, 2024, pp. 1-10

DeepRISBeam: Deep Learning-based RIS Beam Management for Radio Channel Optimization

I. Ioannou; M. Raspopoulos; P. Nagaradjane; C. Christophorou,W. A. Aziz, V. Vasiliou, A. Pistillides · in IEEE Access, vol. 12, pp. 81646-81681, 2024

Radar-Based Millimeter-Wave Sensing for Accurate 3-D Indoor Positioning: Potentials and Challenges

A. Sesyuk, S. Ioannou and M. Raspopoulos · in IEEE Journal of Indoor and Seamless Positioning and Navigation, vol. 2, pp. 61-75, 2024

3D millimeter-Wave Indoor Localization

A. Sesyuk, S. Ioannou and M. Raspopoulos · 2023 13th International Conference on Indoor Positioning and Indoor Navigation (IPIN), Nuremberg, Germany, 2023, pp. 1-7

CNN based Real-time Forest Fire Detection System for Low-power Embedded Devices

J. Ye, S. Ioannou, P. Nikolaou and M. Raspopoulos · 2023 31st Mediterranean Conference on Control and Automation (MED), Limassol, Cyprus, 2023, pp. 137-143

Privacy-Preserving Presence Tracing for Pandemics Via Machine-to-Machine Exposure Notifications

C. Laoudias, M. Raspopoulos, S. Christoforou and A. Kamilaris · 2022 23rd IEEE International Conference on Mobile Data Management (MDM), Paphos, Cyprus, 2022, pp. 355-360

A Survey of 3D Indoor Localization Systems and Technologies

Sesyuk, A.; Ioannou, S.; Raspopoulos, M · Sensors 2022, 22, 9380

Modulation Processes and Mathematical Models of the TCR

S. Ioannou, M. C. Argyrou, P. Christodoulides, M. Raspopoulos, M. Darwish and C. C. Marouchos · 2021 International Conference on Electrical, Computer, Communications and Mechatronics Engineering (ICECCME), Mauritius, Mauritius, 2021, pp. 1-5

Load Shedding Schemes For Islanding Distribution Network Operation

Hirodontis, S.; Ioannou, S.; Raspopoulos, M.: · IET Conference Proceedings, , p. 97-102, IET Digital Library

An Adaptive Load Shedding Method For Blackout Prevention In Active Distribution Networks

Hirodontis, S.; Ioannou, S.; Raspopoulos, M.: · IET Conference Proceedings, , p. 441-446, IET Digital Library

PINSPOT: An oPen platform for INtelligent context-baSed Indoor POsiTioning

Raspopoulos, M., Paspallis, N. & Kaimakis, P. (2019) · In A. Siarheyeva, C. Barry, M. Lang, H. Linger, & C. Schneider (Eds.), Information Systems Development: Information Systems Beyond 2020 (ISD2019 Proceedings). Toulon, France: ISEN Yncréa Méditerranée

An experience report on the effectiveness of five themed workshops at inspiring high school students to learn coding

Nearchos Paspallis, Irene Polycarpou, Panayiotis Andreou, Josephina Antoniou, Paris Kaimakis, Marios Raspopoulos, and Maria Terzi. 2018 · In Proceedings of the 23rd Annual ACM Conference on Innovation and Technology in Computer Science Education (ITiCSE 2018). Association for Computing Machinery, New York, NY, USA, 105–110

Multidevice Map-Constrained Fingerprint-Based Indoor Positioning Using 3-D Ray Tracing

M. Raspopoulos · in IEEE Transactions on Instrumentation and Measurement, vol. 67, no. 2, pp. 466-476, Feb. 2018

An Open Platform for Studying and Testing Context-Aware Indoor Positioning Algorithms

Paspallis, N., Raspopoulos, M. (2017) · In: Goluchowski, J., Pankowska, M., Linger, H., Barry, C., Lang, M., Schneider, C. (eds) Complexity in Information Systems Development. Lecture Notes in Information Systems and Organisation, vol 22. Springer, Cham

Active Life Coach: Towards a Framework for Holistic Care of Citizens as They Age

Andreou, P. and Raspopoulos, M · (2016). MCIS 2016 Proceedings. 42

Optimizing route prior knowledge for map-aided fingerprint-based positioning systems

A. Kokkinis, L. Kanaris, M. Raspopoulos, A. Liotta and S. Stavrou · The 8th European Conference on Antennas and Propagation (EuCAP 2014), The Hague, Netherlands, 2014, pp. 2141-2144

Improving RSS fingerprint-based localization using directional antennas

L. Kanaris, A. Kokkinis, M. Raspopoulos, A. Liotta and S. Stavrou · The 8th European Conference on Antennas and Propagation (EuCAP 2014), The Hague, Netherlands, 2014, pp. 1593-1597

Map-aided fingerprint-based indoor positioning

A. Kokkinis, M. Raspopoulos, L. Kanaris, A. Liotta and S. Stavrou · 2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), London, UK, 2013, pp. 270-274

A binomial distribution approach for the evaluation of indoor positioning systems

L. Kanaris, A. Kokkinis, A. Liotta, M. Raspopoulos and S. Stavrou · ICT 2013, Casablanca, Morocco, 2013, pp. 1-4

Anchor-less Self-Positioning in Rectangular Room Based on Sectorized Narrowband Antennas

I. Arambasic, J. Casajus Quiros, I. Raos, M. Raspopoulos and S. Stavrou · European Wireless 2013; 19th European Wireless Conference, Guildford, UK, 2013, pp. 1-6

Ray tracing-based radio propagation modeling for indoor localization purposes

M. Laaraiedh, B. Uguen, J. Stephan, Y. Corre, Y. Lostanlen, M. Raspopoulos, S. Stavrou · 2012 IEEE 17th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD), Barcelona, Spain, 2012, pp. 276-280

Self-positioning and mapping of rectangular rooms with sectorized narrowband antennas

I. Arambasic, M. Raspopoulos, J. C. Quiros, I. Raos and S. Stavrou · SoftCOM 2012, 20th International Conference on Software, Telecommunications and Computer Networks, Split, Croatia, 2012, pp. 1-5

Cross device fingerprint-based positioning using 3D Ray Tracing

M. Raspopoulos, C. Laoudias, L. Kanaris, A. Kokkinis, C. G. Panayiotou and S. Stavrou · 2012 8th International Wireless Communications and Mobile Computing Conference (IWCMC), Limassol, Cyprus, 2012, pp. 147-152

Location-dependent information extraction for positioning

M. Raspopoulos et al · 2012 International Conference on Localization and GNSS, Starnberg, Germany, 2012, pp. 1-6, keywords: {Estimation;Accuracy;Magnetic sensors;Databases;Sensor fusion;Electronic mail}

3D Ray Tracing for device-independent fingerprint-based positioning in WLANs

M. Raspopoulos, C. Laoudias, L. Kanaris, A. Kokkinis, C. G. Panayiotou and S. Stavrou · 2012 9th Workshop on Positioning, Navigation and Communication, Dresden, Germany, 2012, pp. 109-113

Mobility Concepts for IMT-Advanced

J. Bastos, V. Monteiro, J.Rodriguez, R. Agüero, D. Gómez, Y. Fernández, M. Peña, F. Bader, C. Verikoukis, J. Herrero, B. Cendón, M. Raspopoulos, S. Stavrou, M. Cabañas, J. Sainz, M. R Santos. (2012) · In: Rodriguez, J., Tafazolli, R., Verikoukis, C. (eds) Mobile Multimedia Communications. MobiMedia 2010. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 77. Springer, Berlin, Heidelberg

Capacity Assessment in Distributed MIMO in Outdoor Environments Using Deterministic Channel Modeling

Raspopoulos, M., Stavrou, S. (2012) · In: Rodriguez, J., Tafazolli, R., Verikoukis, C. (eds) Mobile Multimedia Communications. MobiMedia 2010. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 77. Springer, Berlin, Heidelberg

Frequency Selective Buildings Through Frequency Selective Surfaces

M. Raspopoulos and S. Stavrou · in IEEE Transactions on Antennas and Propagation, vol. 59, no. 8, pp. 2998-3005, Aug. 2011

Cognitive radio and cooperative strategies for power saving in multi-standard wireless devices

J., Paulo Marques, A. Radwan, K. Moessner, R. Tafazolli, M. Raspopoulos, S. Stavrou, P. Trapps, D. Noquet, K. Sithamparanathan, Á. Gomes, R. Piesiewicz, H. Mokrani, A. Foglar, C. Verikoukis · 2010 Future Network & Mobile Summit, Florence, Italy, 2010, pp. 1-8

'Capacity of MIMO systems in FSS environments'

Raspopoulos, M.; King, P.; Stavrou, S · Electronics Letters, 2008, 44, (4), p. 304-306, IET Digital Library

'Frequency selective surfaces on building materials – air gap impact'

Raspopoulos, M.; Stavrou, S · Electronics Letters, 2007, 43, (13), p. 700-702, , IET Digital Library

Radio propagation in frequency selective buildings

Raspopoulos, M., Chaudhry, F.A. and Stavrou, S. (2006) · Eur. Trans. Telecomm., 17: 407-413. [)

Effect of Frequency Selective Surfaces on radio wave propagation in indoor environments

F. A. Chaudhry, M. Raspopoulos and S. Stavrou · 11th European Wireless Conference 2005 - Next Generation wireless and Mobile Communications and Services, Nicosia, Cyprus, 2006, pp. 1-5