Channel modeling and fundamental limits of
U-MIMO THz systems

Hello! I am Viviana Centritto Arrojo, a Spanish-Venezuelan engineer. I was born and raised in Caracas, Venezuela, and have been living in Spain for the last few years.

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I completed my bachelor’s degree in Telecommunication Engineering at Universidad Católica Andrés Bello, Caracas from 2017 to 2023 and then move to Barcelona to complete my master’s degree in Advanced Telecommunication Technologies at Universitat Politécnica de Catalunya from 2024 to 2026, where my research primarily focused on the characterization of 5G and underwater optical wireless channels, signal processing and antenna design.

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During my master’s degree, I joined the Nanonetworking Center in Catalunya (N3Cat), where I conducted research on designing a 28 GHz cryo-CMOS on-chip antenna and characterizing the wireless propagation channel within a realistic quantum cryostat. Furthermore, I developed a 3D underwater wireless optical communication channel model to address the beam-pointing problem for a moving autonomous underwater vehicle subject to unknown ocean currents using a DQN reinforcement learning framework. Throughout this research experience, I collaborated on two conference papers accepted to IEEE ISCAS and IEEE EuCAP 2026. Therefore, I gained a practical understanding of research methodologies, honed my collaborative skills in multidisciplinary settings, and refined my ability to effectively communicate and present technical findings.

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As part of the TeraWireless  project, I am currently a PhD candidate at the University of Piraeus, Greece. My research focuses on formulating a statistical small-scale fading model for THz channels. To achieve this, I am integrating essential features, such as multi-mode transmission, mutual coupling, spherical waves, and atmospheric impacts, to assess the fundamental limits and performance metrics of U-MIMO THz communication frameworks. Furthermore, I will embed this channel formulation within large-scale models, validate its accuracy using simulations, and execute system-level analyses of THz communications to support the project's broader goals.

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Currently, I am working on the initial development of a small-scale fading channel model for THz. I am investigating the resolvability of THz signal paths, alongside the impact of various physical effects on U-MIMO propagation. This research aims to lay the groundwork for next-generation wireless networks that deliver fiber-optic data speeds with guaranteed reliability for advanced use cases in the telecommunications industry.

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Being part of the TeraWireless project provides a unique opportunity to collaborate across Europe within a pioneering EU industrial doctoral network. Crucially, my secondment at Ranplan Group AB in Sweden provides an invaluable chance to bridge the gap between theoretical innovation and real-world industrial application.