Browsing by Author "Dovelos, Konstantinos"

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  • Channel estimation and hybrid combining for wideband terahertz massive MIMO systems
    Dovelos, Konstantinos; Matthaiou, Michail; Ngo, Hien Quoc; Bellalta, Boris (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    Terahertz (THz) communication is widely considered as a key enabler for future 6G wireless systems. However, THz links are subject to high propagation losses and inter-symbol interference due to the frequency selectivity ...
  • Electromagnetic modeling of holographic intelligent reflecting surfaces at Terahertz bands
    Dovelos, Konstantinos; Assimonis, Stylianos D.; Ngo, Hien Quoc; Bellalta, Boris; Matthaiou, Michail (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    Intelligent reflecting surface (IRS)-assisted wireless communication is widely deemed a key technology for 6G systems. The main challenge in deploying an IRS-aided terahertz (THz) link, though, is the severe propagation ...
  • Intelligent reflecting surface-aided wideband THz communications: modeling and analysis
    Dovelos, Konstantinos; Assimonis, Stylianos D.; Ngo, Hien Quoc; Bellalta, Boris; Matthaiou, Michail (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    In this paper, we study the performance of wideband terahertz (THz) communications assisted by an intelligent reflecting surface (IRS). Specifically, we first introduce a generalized channel model that is suitable for ...
  • Intelligent reflecting surfaces at terahertz bands: channel modeling and analysis
    Dovelos, Konstantinos; Assimonis, Stylianos D.; Ngo, Hien Quoc; Bellalta, Boris; Matthaiou, Michail (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    An intelligent reflecting surface (IRS) at terahertz (THz) bands is expected to have a massive number of reflecting elements to compensate for the severe propagation losses. However, as the IRS size grows, the conventional ...
  • Terahertz communications: Physical layer enablers and analysis
    Dovelos, Konstantinos (Universitat Pompeu Fabra, 2021-11-05)
    Undoubtedly, spectrum scarcity constitutes the main bottleneck of current wireless networks. It is therefore imperative to move beyond the sub-6 GHz band in order to overcome this limitation. Toward this direction, terahertz ...