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G. Tombras · SciRah

Researcher profile · Semantic Scholar

G. Tombras

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G. Tombras — researcher profile on SciRah

h-index: 32
Works: 172
Citations: 3,519

Most-cited papers

Serial Free-Space Optical Relaying Communications Over Gamma-Gamma Atmospheric Turbulence Channels
Christos Datsikas, K. Peppas, N. Sagias, G. Tombras
2010IEEE\/OSA Journal of Optical Communications and Networking155 citations
Semantic Scholar
Capacity analysis of dual amplify-and-forward relayed free-space optical communication systems over turbulence channels with pointing errors
K. Peppas, A. Stassinakis, H. Nistazakis, G. Tombras
2013IEEE\/OSA Journal of Optical Communications and Networking101 citations
Semantic Scholar
Performance estimation of free space optical links over negative exponential atmospheric turbulence channels
H. Nistazakis, V. Assimakopoulos, G. Tombras
201179 citations
Semantic Scholar
SIMO optical wireless links with nonzero boresight pointing errors over M modeled turbulence channels
G. Varotsos, H. Nistazakis, Milica I. Petkovic, G. Djordjevic +1 more
201772 citations
Semantic Scholar
A Novel Chaotic System without Equilibrium: Dynamics, Synchronization, and Circuit Realization
A. Azar, C. Volos, N. Gerodimos, G. Tombras +5 more
2017Complex71 citations Open access
Semantic Scholar
QAM and PSK OFDM RoFSO Over M-Turbulence Induced Fading Channels
H. Nistazakis, A. Stassinakis, H. Sandalidis, G. Tombras
201561 citations Open access
Semantic Scholar
BER estimation for multi-hop RoFSO QAM or PSK OFDM communication systems over gamma gamma or exponentially modeled turbulence channels
H. Nistazakis, A. Stassinakis, S. Muhammad, G. Tombras
201461 citations
Semantic Scholar
FSO links with diversity pointing errors and temporal broadening of the pulses over weak to strong atmospheric turbulence channels
G. Varotsos, H. Nistazakis, C. Volos, G. Tombras
201654 citations
Semantic Scholar
Improving the availability of terrestrial FSO links over log normal atmospheric turbulence channels using dispersive chirped Gaussian pulses
A. Stassinakis, H. Nistazakis, K. Peppas, G. Tombras
201348 citations
Semantic Scholar
Performance Analysis of Hard-Switching Based Hybrid FSO/RF System over Turbulence Channels
H. Khalid, S. Muhammad, H. Nistazakis, G. Tombras
2019De Computis46 citations Open access
Semantic Scholar
Underwater Optical Wireless Communication Systems: A Concise Review
L. Gkoura, G. D. Roumelas, H. Nistazakis, H. Sandalidis +3 more
201740 citations Open access
Semantic Scholar
Estimation of Outage Capacity for Free Space Optical Links over I-K and K Turbulent Channels
H. Nistazakis, A. Tsigopoulos, Michalis P. Hanias, C. Psychogios +3 more
201140 citations
Semantic Scholar
An Overview of the Physical Insight and the Various Performance Metrics of Fading Channels in Wireless Communication Systems
K. Peppas, H. E. Nistazakis, G. Tombras
201137 citations Open access
Semantic Scholar
Hyperchaotic Attractor in a Novel Hyperjerk System with Two Nonlinearities
P. Daltzis, S. Vaidyanathan, V. Pham, C. Volos +2 more
2018Circuits Syst. Signal Process.36 citations
Semantic Scholar
On the BER performance of FSO links with multiple receivers and spatial jitter over gamma-gamma or exponential turbulence channels
Michalis P. Ninos, H. Nistazakis, G. Tombras
201735 citations
Semantic Scholar
Comparative performance study of one or multiple receivers schemes for FSO links over gamma–gamma turbulence channels
A. Stassinakis, H. Nistazakis, G. Tombras
201234 citations
Semantic Scholar
Probability of fade estimation for FSO links with time dispersion and turbulence modeled with the gamma-gamma or the I-K distribution
G. Varotsos, A. Stassinakis, H. Nistazakis, A. Tsigopoulos +3 more
201432 citations
Semantic Scholar
An Accurate Computational Tool for Performance Estimation of FSO Communication Links over Weak to Strong Atmospheric Turbulent Channels
Theodore D. Katsilieris, G. Latsas, H. Nistazakis, G. Tombras
2017De Computis31 citations Open access
Semantic Scholar
DF Relayed Subcarrier FSO Links over Malaga Turbulence Channels with Phase Noise and Non-Zero Boresight Pointing Errors
G. Varotsos, H. Nistazakis, W. Gappmair, H. Sandalidis +1 more
201824 citations Open access
Semantic Scholar
Higher Order Capacity Statistics of Diversity Receivers
N. Sagias, F. Lazarakis, A. Alexandridis, K. Dangakis +1 more
2011Wireless personal communications24 citations
Semantic Scholar
An Inverse Pheromone Approach in a Chaotic Mobile Robot’s Path Planning Based on a Modified Logistic Map
Eleftherios K. Petavratzis, C. Volos, L. Moysis, I. Stouboulos +3 more
2019Technologies21 citations Open access
Semantic Scholar
SIMO subcarrier PSK FSO links with phase noise and non-zero boresight pointing errors over turbulence channels
G. Varotsos, H. Nistazakis, W. Gappmair, H. Sandalidis +1 more
2019IET Communications19 citations
Semantic Scholar
Pedagogical Approaches to 21st Century Learning: A Model to Prepare Learners for 21st Century Competencies and Skills in Engineering
Ghassan Frache, G. Tombras, H. Nistazakis, N. Thompson
2019IEEE Global Engineering Education Conference17 citations
Semantic Scholar
Performance study of terrestrial multi-hop OFDM FSO communication systems with pointing errors over turbulence channels
H. Nistazakis, Michalis P. Ninos, A. Tsigopoulos, D. A. Zervos +1 more
201617 citations
Semantic Scholar
Mixed Topology of DF Relayed Terrestrial Optical Wireless Links with Generalized Pointing Errors over Turbulence Channels
GeorgeK Varotsos, H. Nistazakis, A. Stassinakis, C. Volos +2 more
2018Technologies16 citations Open access
Semantic Scholar
Analysis, Synchronization and Circuit Design of a 4D Hyperchaotic Hyperjerk System
P. Daltzis, C. Volos, H. Nistazakis, A. Tsigopoulos +1 more
2018De Computis16 citations Open access
Semantic Scholar
OFDM RoFSO Links with Relays Over Turbulence Channels and Nonzero Boresight Pointing Errors
G. Varotsos, H. Nistazakis, G. Tombras
2017Journal of Communications16 citations
Semantic Scholar
Performance of quadrature amplitude modulation orthogonal frequency division multiplexing-based free space optical links with non-linear clipping effect over gamma–gamma modelled turbulence channels
H. Nistazakis, A. Stassinakis, S. Sinanović, W. Popoola +1 more
201516 citations Open access
Semantic Scholar
Spatial diversity for QAM OFDM RoFSO links with nonzero boresight pointing errors over atmospheric turbulence channels
Michalis P. Ninos, H. Nistazakis, E. Leitgeb, G. Tombras
2018Journal of Modern Optics15 citations
Semantic Scholar
Reengineering engineering education: Developing a constructively aligned learning-by-doing pedagogical model for 21st century education
Ghassan Frache, H. Nistazakis, G. Tombras
2017IEEE Global Engineering Education Conference15 citations
Semantic Scholar
Investigating student understanding of operational-amplifier circuits
Christos Papanikolaou, G. Tombras, Kevin L. Van De Bogart, M. Stetzer
201514 citations Open access
Semantic Scholar
On the performance of optical wireless communication links impaired by time jitter, M-turbulence and pointing errors
G. D. Roumelas, H. Nistazakis, E. Leitgeb, A. Stassinakis +1 more
202013 citations
Semantic Scholar
Performance Analysis of SISO and MIMO FSO Communication Systems Over Turbulent Channels
K. Peppas, H. Nistazakis, V. Assimakopoulos, G. Tombras
201212 citations Open access
Semantic Scholar
Time Jitter, Turbulence and Chromatic Dispersion in Underwater Optical Wireless Links
G. D. Roumelas, H. Nistazakis, A. Stassinakis, G. Varotsos +2 more
2019Technologies11 citations Open access
Semantic Scholar
Block error rate performance of OOK free‐space optical links over gamma–gamma turbulence channels with generalised non‐zero boresight pointing errors
Michalis P. Ninos, H. Nistazakis, H. Sandalidis, A. Stassinakis +1 more
2018IET Optoelectronics11 citations
Semantic Scholar
Outage performance of mixed, parallel and serial DF relayed FSO links over weak turbulence channels with nonzero boresight pointing errors
G. K. Varotsos, H. Nistazakis, A. Stassinakis, G. Tombras +2 more
2018International Conference on Modern Circuits and Systems Technologies11 citations
Semantic Scholar
Experimental Model Development for the Attenuation Coefficient Estimation of Terrestrial Optical Wireless Links over the Sea
Argyris N. Stassinakis, G. A. Papavgeris, H. Nistazakis, A. Tsigopoulos +2 more
2021Telecom10 citations Open access
Semantic Scholar
Performance of SIMO FSO Links over Mixture Composite Irradiance Channels
N. A. Androutsos, H. Nistazakis, A. Stassinakis, H. Sandalidis +1 more
2019Applied Sciences10 citations Open access
Semantic Scholar
Dual-hop multi-input multi-output relay systems over spatially correlated Nakagami-m fading channels
K. Peppas, Christos Datsikas, N. Sagias, G. Tombras
2011IET Communications10 citations
Semantic Scholar
A Lab of Hands-on STEM Experiments for Primary Teachers at CERN
Tina P. Nantsou, Efstratios C. Kapotis, G. Tombras
2021IEEE Global Engineering Education Conference9 citations
Semantic Scholar
Serially DF relayed hybrid FSO/MMW links with Weibull fading, M-turbulence and pointing errors
G. D. Roumelas, H. Nistazakis, E. Leitgeb, Hristo Ivanov +2 more
20209 citations
Semantic Scholar
Adaptive Control and Synchronization of a Memristor-Based Shinriki’s System
C. Volos, S. Vaidyanathan, V. Pham, H. Nistazakis +3 more
20179 citations
Semantic Scholar
Hands-on Physics Experiments for K-6 Teachers at CERN
T. Nantsou, G. Tombras
2022IEEE Global Engineering Education Conference8 citations
Semantic Scholar
Learning-by-Doing as an Educational Method of Conducting Experiments in Electronic Physics
T. Nantsou, Ghassan Frache, E. Kapotis, H. Nistazakis +1 more
2020IEEE Global Engineering Education Conference8 citations
Semantic Scholar
CDMA RoFSO Links With Nonzero Boresight Pointing Errors Over M Turbulence Channels
Michalis P. Ninos, H. Nistazakis, H. Sandalidis, G. Tombras
2018IEEE Photonics Journal8 citations Open access
Semantic Scholar
Serial relaying communications over generalized-gamma fading channels
Christos Datsikas, K. Peppas, N. Sagias, G. Tombras
2012Wireless Communications and Mobile Computing7 citations Open access
Semantic Scholar
Estimation of capacity bounds of free space optical channels under strong turbulence conditions
H. Nistazakis, D. Marinos, M. Hanias, C. Aidinis +4 more
201018-th INTERNATIONAL CONFERENCE ON MICROWAVES, RADAR AND WIRELESS COMMUNICATIONS7 citations
Semantic Scholar
STEM Lab on Climate Change with Simple Hands-on Experiments
T. Nantsou, G. Tombras
2022IEEE Global Engineering Education Conference6 citations
Semantic Scholar
Greek MOOC of Experiments with Simple Materials for Students Generates Significant Findings for Teachers and Physics Education
Tina P. Nantsou, Efstratios C. Kapotis, G. Tombras
2021IEEE Global Engineering Education Conference6 citations
Semantic Scholar
Circuit Implementation of a Modified Chaotic System with Hyperbolic Sine Nonlinearities Using Bi-Color LED
C. Volos, L. Moysis, G. D. Roumelas, Aggelos Giakoumis +2 more
2021Technologies6 citations Open access
Semantic Scholar

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