424 citations · 3.5k across the 177 of their papers we have counts for
26 papers · 1 filter
Wireless Powered Communications with Non-Orthogonal Multiple Access
Panagiotis D. Diamantoulakis, Koralia N. Pappi, Zhiguo Ding +1
We study a wireless-powered uplink communication system with non-orthogonal multiple access (NOMA), consisting of one base station and multiple energy harvesting users. More specif…
Spectrum Sensing Under Hardware Constraints
Alexandros-Apostolos A. Boulogeorgos, Nestor D. Chatzidiamantis, George K. Karagiannidis
Direct-conversion radio (DCR) receivers can offer highly integrated low-cost hardware solutions for spectrum sensing in cognitive radio systems. However, DCR receivers are suscepti…
Performance Analysis of Energy Detection over Mixture Gamma based Fading Channels with Diversity Reception
Omar Alhussein, Ahmed Al Hammadi, Paschalis C. Sofotasios +4
The present paper is devoted to the evaluation of energy detection based spectrum sensing over different multipath fading and shadowing conditions. This is realized by means of a u…
Wireless Powered Communications: Performance Analysis and Optimization
Caijun Zhong, Xiaoming Chen, Zhaoyang Zhang +1
This paper investigates the average throughput of a wireless powered communications system, where an energy constrained source, powered by a dedicated power beacon (PB), communicat…
Securing the MIMO Wiretap Channel with Polar Codes and Encryption
Dimitrios S. Karas, Alexandros-Apostolos A. Boulogeorgos, Sotirios K. Mihos +2
Polar codes have been proven to be capacity achieving for any binary-input discrete memoryless channel, while at the same time they can reassure secure and reliable transmission ov…
Dynamic Spectrum Sensing Through Accelerated Particle Swarm Optimization
Alexandros E. Paschos, Vasileios M. Kapinas, Georgia D. Ntouni +2
In this paper, a novel optimization algorithm, called the acceleration-aided particle swarm optimization (AAPSO), is proposed for reliable dynamic spectrum sensing in cognitive rad…
Error Rate and Power Allocation Analysis of Regenerative Networks under Generalized Fading Conditions
Mulugeta K. Fikadu, Paschalis C. Sofotasios, Mikko Valkama +3
Cooperative communication has been shown to provide significant increase of transmission reliability and network capacity while expanding coverage in cellular networks. The present…
Entropy and Channel Capacity under Optimum Power and Rate Adaptation over Generalized Fading Conditions
Paschalis C. Sofotasios, Sami Muhaidat, Mikko Valkama +2
Accurate fading characterization and channel capacity determination are of paramount importance in both conventional and emerging communication systems. The present work addresses…
I/Q-Imbalance Self-Interference Coordination
Alexandros-Apostolos A. Boulogeorgos, Vasileios M. Kapinas, George K. Karagiannidis +1
In this paper, we present a novel low-complexity scheme, which improves the performance of single-antenna multi-carrier communication systems, suffering from in-phase and quadratur…
Exact Error Analysis and Energy-Efficiency Optimization of Regenerative Relay Systems with Spatial Correlation
Mulugeta K. Fikadu, Paschalis C. Sofotasios, Qimei Cui +2
Energy efficiency and its optimization constitute critical tasks in the design of low-power wireless networks. The present work is devoted to the error rate analysis and energy-eff…
A Minorization-Maximization Method for Optimizing Sum Rate in Non-Orthogonal Multiple Access Systems
Muhammad Fainan Hanif, Zhiguo Ding, Tharmalingam Ratnarajah +1
Non-orthogonal multiple access (NOMA) systems have the potential to deliver higher system throughput, compared to contemporary orthogonal multiple access techniques. For a linearly…
Energy Detection of Unknown Signals over Cascaded Fading Channels
Paschalis C. Sofotasios, Lina Mohjazi, Sami Muhaidat +2
Energy detection is a favorable mechanism in several applications relating to the identification of deterministic unknown signals such as in radar systems and cognitive radio commu…
Solutions to Integrals Involving the Marcum Q-Function and Applications
Paschalis C. Sofotasios, Sami Muhaidat, George K. Karagiannidis +1
Novel analytic solutions are derived for integrals that involve the generalized Marcum Q-function, exponential functions and arbitrary powers. Simple closed-form expressions are al…
Analytic solutions to a Marcum Q-function-based integral and application in energy detection of unknown signals over multipath fading channels
Paschalis C. Sofotasios, Mikko Valkama, Theodoros A. Tsiftsis +3
This work presents analytic solutions for a useful integral in wireless communications, which involves the Marcum function in combination with an exponential function and arb…
The Area Under a Receiver Operating Characteristic Curve Over Enriched Multipath Fading Conditions
Paschalis C. Sofotasios, Mulugeta K. Fikadu, Khuong Ho-Van +2
This work is devoted to the analysis of the performance of energy detection based spectrum sensing in the presence of enriched fading conditions which are distinct for the large nu…
Optimum Wirelessly Powered Relaying
Caijun Zhong, Gan Zheng, Zhaoyang Zhang +1
This paper maximizes the achievable throughput of a relay-assisted wirelessly powered communications system, where an energy constrained source, helped by an energy constrained rel…
Another look in the Analysis of Cooperative Spectrum Sensing over Nakagami- Fading Channels
Debasish Bera, Sant S. Pathak, Indrajit Chakrabarty +1
Modeling and analysis of cooperative spectrum sensing is an important aspect in cognitive radio systems. In this paper, the problem of energy detection (ED) of an unknown signal ov…
Big Data Analytics for Dynamic Energy Management in Smart Grids
Panagiotis D. Diamantoulakis, Vasileios M. Kapinas, George K. Karagiannidis
The smart electricity grid enables a two-way flow of power and data between suppliers and consumers in order to facilitate the power flow optimization in terms of economic efficien…
Non-Orthogonal Multiple Access for Visible Light Communications
Hanaa Marshoud, Vasileios M. Kapinas, George K. Karagiannidis +1
The main limitation of visible light communication (VLC) is the narrow modulation bandwidth, which reduces the achievable data rates. In this paper, we apply the non-orthogonal mul…
Efficient Machine Learning for Big Data: A Review
O. Y. Al-Jarrah, P. D. Yoo, S Muhaidat +2
With the emerging technologies and all associated devices, it is predicted that massive amount of data will be created in the next few years, in fact, as much as 90% of current dat…
Unified Analysis of Cooperative Spectrum Sensing over Composite and Generalized Fading Channels
Ahmed Al Hammadi, Omar Alhussein, Sami Muhaidat +3
In this paper, we investigate the performance of cooperative spectrum sensing (CSS) with multiple antenna nodes over composite and generalized fading channels. We model the probabi…
Modeling and Analysis of Wireless Channels via the Mixture of Gaussian Distribution
Bassant Selim, Omar Alhussein, Sami Muhaidat +2
Considerable efforts have been devoted to statistical modeling and the characterization of channels in a range of statistical models for fading channels. In this paper, we consider…
RF-Powered Cognitive Radio Networks: Technical Challenges and Limitations
Lina Mohjazi, Mehrdad Dianati, George K. Karagiannidis +2
The increasing demand for spectral and energy efficient communication networks has spurred a great interest in energy harvesting (EH) cognitive radio networks (CRNs). Such a revolu…
On Secrecy Performance of Antenna Selection Aided MIMO Systems Against Eavesdropping
Jia Zhu, Yulong Zou, Gongpu Wang +2
In this paper, we consider a multiple-input multiple-output (MIMO) system consisting of one source, one destination and one eavesdropper, where each node is equipped with an arbitr…