376 citations · 528 across the 84 of their papers we have counts for
17 papers · 1 filter
Space-Terrestrial Cooperation Over Spatially Correlated Channels Relying on Imperfect Channel Estimates: Uplink Performance Analysis and Optimization
Trinh Van Chien, Eva Lagunas, Tiep M. Hoang +3
A whole suite of innovative technologies and architectures have emerged in response to the rapid growth of wireless traffic. This paper studies an integrated network design that bo…
Efficient Hamiltonian Reduction for Quantum Annealing on SatCom Beam Placement Problem
Thinh Q. Dinh, Son Hoang Dau, Eva Lagunas +1
Beam Placement (BP) is a well-known problem in Low-Earth Orbit (LEO) satellite communication (SatCom) systems, which can be modelled as an NP-hard clique cover problem. Recently, q…
Intelligent and Secure Radio Environments for 6G Vehicular Aided HetNets: Key Opportunities and Challenges
Wali Ullah Khan, Muhammad Awais Javed, Sherali Zeadally +2
Reconfigurable meta-surfaces are emerging as a novel and revolutionizing technology to enable intelligent wireless environments. Due to the low cost, improved efficiency, and passi…
Opportunities for Intelligent Reflecting Surfaces in 6G-Empowered V2X Communications
Wali Ullah Khan, Asad Mahmood, Arash Bozorgchenani +7
This paper first describes the introduction of 6G-empowered V2X communications and IRS technology. Then it discusses different use case scenarios of IRS enabled V2X communications…
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…
Power Allocation for Space-Terrestrial Cooperation Systems with Statistical CSI
Trinh Van Chien, Eva Lagunas, Tiep M. Hoang +3
This paper studies an integrated network design that boosts system capacity through cooperation between wireless access points (APs) and a satellite. By coherently combing the sign…
Learning to Optimize: Balancing Two Conflict Metrics in MB-HTS Networks
Van-Phuc Bui, Trinh Van Chien, Eva Lagunas +3
For multi-beam high throughput (MB-HTS) geostationary (GEO) satellite networks, the congestion appears when user's demands cannot be fully satisfied. This paper boosts the system p…
GEO Payload Power Minimization: Joint Precoding and Beam Hopping Design
Vu Nguyen Ha, Ti Ti Nguyen, Eva Lagunas +2
This paper aims to jointly determine linear precoding (LP) vectors, beam hopping (BH), and discrete DVB-S2X transmission rates for the GEO satellite communication systems to minimi…
Rate Splitting Multiple Access for Cognitive Radio GEO-LEO Co-Existing Satellite Networks
Wali Ullah Khan, Zain Ali, Eva Lagunas +2
LEO satellite communication has drawn particular attention recently due to its high data rate services and low round-trip latency. It is low-cost to launch and can provide global c…
Rate Splitting Multiple Access for Next Generation Cognitive Radio Enabled LEO Satellite Networks
ali Ullah Khan, Zain Ali, Eva Lagunas +6
This paper proposes a cognitive radio enabled LEO SatCom using RSMA radio access technique with the coexistence of GEO SatCom network. In particular, this work aims to maximize the…
Joint Beam Placement and Load Balancing Optimization for Non-Geostationary Satellite Systems
Van Phuc Bui, Trinh Van Chien, Eva Lagunas +3
Non-geostationary (Non-GSO) satellite constellations have emerged as a promising solution to enable ubiquitous high-speed low-latency broadband services by generating multiple spot…
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…
Integration of NOMA with Reflecting Intelligent Surfaces: A Multi-cell Optimization with SIC Decoding Errors
Wali Ullah Khan, Eva Lagunas, Asad Mahmood +3
Reflecting intelligent surfaces (RIS) has gained significant attention due to its high energy and spectral efficiency in next-generation wireless networks. By using low-cost passiv…
Opportunities for Physical Layer Security in UAV Communication Enhanced with Intelligent Reflective Surfaces
Wali Ullah Khan, Eva Lagunas, Zain Ali +5
Unmanned Aerial Vehicles (UAVs) are an important component of next-generation wireless networks that can assist in high data rate communications and provide enhanced coverage.Their…
Energy Efficiency Optimization for Backscatter Enhanced NOMA Cooperative V2X Communications under Imperfect CSI
Wali Ullah Khan, Muhammad Ali Jamshed, Eva Lagunas +3
Automotive-Industry 5.0 will use beyond fifth-generation (B5G) technologies to provide robust, computationally intelligent, and energy-efficient data sharing among various onboard…
Backscatter-Aided NOMA V2X Communication under Channel Estimation Errors
Wali Ullah Khan, Muhammad Ali Jamshed, Asad Mahmood +3
Backscatter communications (BC) has emerged as a promising technology for providing low-powered transmissions in nextG (i.e., beyond 5G) wireless networks. The fundamental idea of…
When RIS Meets GEO Satellite Communications: A New Sustainable Optimization Framework in 6G
Wali Ullah Khan, Eva Lagunas, Asad Mahmood +2
Reflecting intelligent surfaces (RIS) is a low-cost and energy-efficient solution to achieve high spectral efficiency in sixth-generation (6G) networks. The basic idea of RIS is to…