G
Giorgos Tatsis
Researcher at University of Ioannina
Publications - 43
Citations - 381
Giorgos Tatsis is an academic researcher from University of Ioannina. The author has contributed to research in topics: Schumann resonances & Orthogonal frequency-division multiplexing. The author has an hindex of 11, co-authored 38 publications receiving 289 citations.
Papers
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Journal ArticleDOI
Pre-seismic Electromagnetic Perturbations in Two Earthquakes in Northern Greece
Kostas Florios,Kostas Florios,Ioannis Contopoulos,Vasilis Christofilakis,Giorgos Tatsis,Spyridon K. Chronopoulos,Christos Repapis,V. Tritakis +7 more
TL;DR: In this paper, a logit regression model was applied to the data to examine whether ELF perturbations could be considered as precursors of seismic activity, and a simple nonlinear statistical model supported the idea that there is some kind of physical interaction between seismic and atmospheric ELF activities.
Journal ArticleDOI
Significant ELF perturbations in the Schumann Resonance band before and during a shallow mid-magnitude seismic activity in the Greek area (Kalpaki)
Vasilis Christofilakis,Giorgos Tatsis,Constantinos I. Votis,Ioannis Contopoulos,Christos Repapis,V. Tritakis +5 more
TL;DR: In this article, strong ELF perturbations in the Schumann Resonance band (0-50 Hz) were detected in the North of Greece close to the village of Kalpaki during a shallow (17 km) mid-magnitude earthquake (5,3R) and the post-seismic sequence that followed it.
Journal ArticleDOI
A new portable ELF Schumann resonance receiver: design and detailed analysis of the antenna and the analog front-end
Constantinos I. Votis,Giorgos Tatsis,Vasilis Christofilakis,Spyridon K. Chronopoulos,Panos Kostarakis,V. Tritakis,Christos Repapis +6 more
TL;DR: The primary objective of this work was to design and implement a stand-alone, portable, and low-cost receiver able to measure as much Schumann resonance harmonics as possible, as well as detailed analysis of the efficient induction coil magnetic antenna and the low-noise amplifying-filtering chain.
Journal ArticleDOI
Preliminary BER Study of a TC - OFDM system operating under noisy conditions
Spyridon K. Chronopoulos,Electronics Telecommunications Physics Depart ment,Vasilis Christofilakis,Giorgos Tatsis,Panos Kostarakis +4 more
TL;DR: In this article, the authors simulated their enhanced OFDM platform based on Turbo Coding (TC) in the presence of a noisy channel (AWGN, Phase noise, Rician noise, ITU PA3) exhibiting excellent BER performance.
Proceedings ArticleDOI
In depth analysis of noise effects in orthogonal frequency division multiplexing systems, utilising a large number of subcarriers
Spyridon K. Chronopoulos,Constantinos I. Votis,Vasilis Raptis,Giorgos Tatsis,Panos Kostarakis +4 more
TL;DR: In this paper, the relationship between BER performance in noisy environments and the number of transmitted subcarriers was investigated. But the authors did not consider the effect of various noise types, such as complex Rayleigh fading, complex rician noise, AWGN and phase noise.