376 citations · 583 across the 22 of their papers we have counts for
23 papers
Physics-Informed Uncertainty-Aware Beamforming for HAPS Massive MIMO under Imperfect CSI
Akram Y. Sarhan, Osamah A. Abdullah, Khalid T. Musri +1
High-altitude platform station (HAPS) massive multiple-input multiple-output (MIMO) systems are expected to support wide-area, low-latency, and energy-efficient connectivity in fut…
Elevation-Aware Supplementary Uplink for Direct Satellite-to-Device Communications
Rajan Shrestha, Hayder Al-Hraishawi
Direct satellite-to-device (DS2D) communication enables standard mobile devices to connect directly to low Earth orbit (LEO) satellites, providing global coverage without reliance…
Adaptive Pinching Antenna Optimization via Meta-Learning for Physical-Layer Security in Dynamic Wireless Networks
Khalid T. Musri, Akram Y. Sarhan, Osamah A. Abdullah +1
This paper develops a gradient-based meta-learning framework for real-time control of waveguided pinching-antenna systems under user-location uncertainty and physical-layer securit…
In-Lab Carrier Aggregation Testbed for Satellite Communication Systems
Jorge L. Gonzalez-Rios, Eva Lagunas, Hayder Al-Hraishawi +2
Carrier Aggregation (CA) is a technique used in 5G and previous cellular generations to temporarily increase the data rate of a specific user during peak demand periods or to reduc…
Pinching Antenna Systems versus Reconfigurable Intelligent Surfaces in mmWave
Mostafa Samy, Hayder Al-Hraishawi, Madyan Alsenwi +3
Flexible and intelligent antenna designs, such as pinching antenna systems and reconfigurable intelligent surfaces (RIS), have gained extensive research attention due to their pote…
Low-Complexity Channel Estimation Protocol for Non-Diagonal RIS-Assisted Communications
Mostafa Samy, Hayder Al-Hraishawi, Abuzar B. M. Adam +3
Non-diagonal reconfigurable intelligent surfaces (RISs) offer enhanced wireless signal manipulation over conventional RIS by enabling the incident signal on any of its elements…
Beyond Diagonal RIS-Aided Networks: Performance Analysis and Sectorization Tradeoff
Mostafa Samy, Hayder Al-Hraishawi, Abuzar B. M. Adam +3
Reconfigurable intelligent surfaces (RISs) have emerged as a spectrum- and energy-efficient technology to enhance the coverage of wireless communications within the upcoming 6G net…
Edge AI Empowered Physical Layer Security for 6G NTN: Potential Threats and Future Opportunities
Hong-fu Chou, Sourabh Solanki, Vu Nguyen Ha +5
Due to the enormous potential for economic profit offered by artificial intelligence (AI) servers, the field of cybersecurity has the potential to emerge as a prominent arena for c…
Satellite-based Quantum Network: Security and Challenges over Atmospheric Channel
Hong-fu Chou, Vu Nguyen Ha, Hayder Al-Hraishawi +4
The ultra-secure quantum network leverages quantum cryptography to deliver unsurpassed data transfer security. In principle, the well-known quantum key distribution (QKD) achieves…
Performance of Joint Symbol Level Precoding and RIS Phase Shift Design in the Finite Block Length Regime with Constellation Rotation
Progress Zivuku, Steven Kisseleff, Wallace A. Martins +3
In this paper, we tackle the problem of joint symbol level precoding (SLP) and reconfigurable intelligent surface (RIS) phase shift design with constellation rotation in the finite…
Digital Twin for Non-Terrestrial Networks: Vision, Challenges, and Enabling Technologies
Hayder Al-Hraishawi, Madyan Alsenwi, Junaid ur Rehman +2
This paper investigates the transformative potential of digital twin (DT) technology for non-terrestrial networks (NTNs). NTNs, comprising airborne and space-borne elements, face u…
Artificial Intelligence for Satellite Communication and Non-Terrestrial Networks: A Survey
G. Fontanesi, F. Ortíz, E. Lagunas +18
This paper surveys the application and development of Artificial Intelligence (AI) in Satellite Communication (SatCom) and Non-Terrestrial Networks (NTN). We first present a compre…
Characterizing and Utilizing the Interplay between Quantum Technologies and Non-Terrestrial Networks
Hayder Al-Hraishawi, Junaid ur Rehman, Mohsen Razavi +1
Quantum technologies are increasingly recognized as groundbreaking advancements set to redefine the landscape of computing, communications, and sensing by leveraging quantum phenom…
An Overview of Channel Models for NGSO Satellites
Victor Monzon Baeza, Eva Lagunas, Hayder Al-Hraishawi +1
Satellite communications industry is currently going through a rapid and profound transformation to adapt to the recent innovations and developments in the realm of non-geostationa…
Joint Beam Hopping and Carrier Aggregation in High Throughput Multi-Beam Satellite Systems
Mirza Golam Kibria, Hayder Al-Hraishawi, Eva Lagunas +2
Beam hopping (BH) and carrier aggregation (CA) are two promising technologies for the next generation satellite communication systems to achieve several orders of magnitude increas…
Improved Gaussian-Bernoulli Restricted Boltzmann Machines for UAV-Ground Communication Systems
Osamah A. Abdullah, Michael C. Batistatos, Hayder Al-Hraishawi
Unmanned aerial vehicle (UAV) is steadily growing as a promising technology for next-generation communication systems due to their appealing features such as wide coverage with hig…
Deep Learning-Based Device-Free Localization in Wireless Sensor Networks
Osamah A. Abdullah, Hayder Al-Hraishawi, Symeon Chatzinotas
Location-based services (LBS) are witnessing a rise in popularity owing to their key features of delivering powerful and personalized digital experiences. The recent developments i…
Multi-layer Space Information Networks: Access Design and Softwarization
Hayder Al-Hraishawi, Mario Minardi, Houcine Chougrani +3
In this paper, we propose an approach for constructing a multi-layer multi-orbit space information network (SIN) to provide high-speed continuous broadband connectivity for space m…
A Survey on Non-Geostationary Satellite Systems: The Communication Perspective
Hayder Al-Hraishawi, Houcine Chougrani, Steven Kisseleff +2
The next phase of satellite technology is being characterized by a new evolution in non-geostationary orbit (NGSO) satellites, which conveys exciting new communication capabilities…
Broadband Non-Geostationary Satellite Communication Systems: Research Challenges and Key Opportunities
Hayder Al-Hraishawi, Symeon Chatzinotas, Björn Ottersten
Besides conventional geostationary (GSO) satellite broadband communication services, non-geostationary (NGSO) satellites are envisioned to support various new communication use cas…
Reconfigurable Intelligent Surfaces for Smart Cities: Research Challenges and Opportunities
Steven Kisseleff, Wallace A. Martins, Hayder Al-Hraishawi +2
The concept of Smart Cities has been introduced as a way to benefit from the digitization of various ecosystems at a city level. To support this concept, future communication netwo…
Traffic Simulator for Multibeam Satellite Communication Systems
Hayder Al-Hraishawi, Eva Lagunas, Symeon Chatzinotas
Assume that a multibeam satellite communication system is designed from scratch to serve a particular area with maximal resource utilization and to satisfactorily accommodate the e…
Carrier Aggregation in Multi-Beam High Throughput Satellite Systems
Mirza Golam Kibria, Eva Lagunas, Nicola Maturo +3
Carrier Aggregation (CA) is an integral part of current terrestrial networks. Its ability to enhance the peak data rate, to efficiently utilize the limited available spectrum resou…