Browsing by Author "Geraci, Giovanni"

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  • 5G massive MIMO architectures: self-backhauled small cells versus direct access
    Bonfante, Andrea; Galati Giordano, Lorenzo; López Pérez, David; García Rodríguez, Adrián; Geraci, Giovanni; Baracca, Paolo; Butt, Majid; Marchetti, Nicola (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    In this paper, we focus on one of the key technologies for the fifth-generation wireless communication networks, massive multiple-input-multiple-output (mMIMO), by investigating two of its most relevant architectures: ...
  • An experimental study of latency for IEEE 802.11be multi-link operation
    Carrascosa Zamacois, Marc; Geraci, Giovanni; Knightly, Edward; Bellalta, Boris (Institute of Electrical and Electronics Engineers (IEEE), 2022)
    Will Multi-Link Operation (MLO) be able to improve the latency of Wi-Fi networks? MLO is one of the most disruptive MAC-layer techniques included in the IEEE 802.11be amendment. It allows a device to use multiple radios ...
  • Analysis of UAV communications in cell-free massive MIMO systems
    D’Andrea, Carmen; García Rodríguez, Adrián; Geraci, Giovanni; Galati Giordano, Lorenzo; Buzzi, Stefano (Institute of Electrical and Electronics Engineers (IEEE), 2020)
    We study support for unmanned aerial vehicle (UAV) communications through a cell-freemassive MIMO architecture, wherein a large number of access points (APs) is deployed in place of largeco-located massive MIMO arrays. We ...
  • Beamforming with artificial noise for secure MISOME cognitive radio transmissions
    Al-Nahari, Azzam; Geraci, Giovanni; Al-Jamali, Mukarram; Hossam Ahmed, Mohamed; Yang, Nan (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    In this paper, we consider multiple-input single-output multi-eavesdropper cognitive radio networks (MISOME-CRNs), where a secondary user (SU) aims to transmit confidential information to a legitimate SU receiver in the ...
  • Cell-free massive MIMO for UAV communications
    D’Andrea, Carmen; García Rodríguez, Adrián; Geraci, Giovanni; Galati Giordano, Lorenzo; Buzzi, Stefano (Institute of Electrical and Electronics Engineers, 2019)
    We study support for unmanned aerial vehicle (UAV) communications through a cell-free massive MIMO ar- chitecture. Under the general assumption that the propagation channel between the mobile stations, either UAVs or ground ...
  • Cellular UAV-to-UAV communications
    Azari, M. Mahdi; Geraci, Giovanni; García Rodríguez, Adrián; Pollin, Sofie (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    Reliable and direct communication between un-manned aerial vehicles (UAVs) could facilitate autonomous flight, collision avoidance, and cooperation in UAV swarms. In this paper, we consider UAV-to-UAV (U2U) communica-tions ...
  • Enhanced multiuser superposition transmission through structured modulation
    Fang, Dong; Huang, Yu Chih; Geraci, Giovanni; Ding, Zhiguo; Claussen, Holger (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    The fifth-generation (5G) air interface, namely, dynamic multiple access (MA) based on multiuser superposition transmission (MUST) and orthogonal MA (OMA), may require a complicated scheduling and heavy signaling overhead. ...
  • The Essential guide to realizing 5G-Connected UAVs with massive MIMO
    García Rodríguez, Adrián; Geraci, Giovanni; López Pérez, David; Galati Giordano, Lorenzo; Ding, Ming; Björnson, Emil (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    What will it take for drones—and the whole associated ecosystem—to take off? Arguably, infallible command and control (C&C) channels for safe and autonomous flying, and high-throughput links for multi-purpose live video ...
  • Interfering channel estimation in radar-cellular coexistence: how much information do we need?
    Liu, Fan; García Rodríguez, Adrián; Masouros, Christos; Geraci, Giovanni (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    In this paper, we focus on the coexistence between a MIMO radar and cellular base stations. We study the interfering channel estimation, where the radar is operated in the “search and track” mode, and the BS receives the ...
  • Lightweight UAV-based measurement system for air-to-ground channels at 28 GHz
    Semkin, Vasilii; Kang, Seongjoon; Haarla, Jaakko; Xia, William; Huhtinen, Ismo; Geraci, Giovanni; Lozano Solsona, Angel; Loianno, Giuseppe; Mezzavilla, Marco; Rangan, Sundeep (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    Wireless communication at millimeter wave frequencies is an attractive option for high-bit-rate connectivity to unmanned aerial vehicles (UAVs). However, conducting the channel measurements necessary to assess the communication ...
  • Massive MIMO unlicensed: a new approach to dynamic spectrum access
    García Rodríguez, Adrián; Geraci, Giovanni; Galati Giordano, Lorenzo; Bonfante, Andrea; Ding, Ming; López Pérez, David (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Nowadays, the demand for wireless mobile services is copious, and will continue increasing in the near future. Mobile cellular operators are therefore looking at the unlicensed spectrum as an economical supplement to ...
  • Millimeter-wave UAV coverage in urban environments
    Kang, Seongjoon; Mezzavilla, Marco; Lozano Solsona, Angel; Geraci, Giovanni; Xia, William; Rangan, Sundeep; Semkin, Vasilii; Loianno, Giuseppe (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    With growing interest in mmWave connectivity for unmanned aerial vehicles (UAVs), a basic question is whether networks intended for terrestrial service can provide sufficient aerial coverage as well. To assess this possibility ...
  • UAV-assisted attack prevention, detection, and recovery of 5G networks
    Sabri Abdalla, Aly; Powell, Keith; Geraci, Giovanni; Marojevic, Vuk (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Unmanned aerial vehicles (UAVs) are emerging as enablers for supporting many applications and services, such as precision agriculture, search and rescue, temporary network deployment or coverage extension, and security. ...
  • UAV-to-UAV communications in cellular networks
    Azari, M. Mahdi; Geraci, Giovanni; García Rodríguez, Adrián; Pollin, Sofie (Institute of Electrical and Electronics Engineers (IEEE), 2020)
    We consider a cellular network deployment where UAV-to-UAV (U2U) transmit-receive pairs share the same spectrum with the uplink (UL) of cellular ground users (GUEs). For this setup, we focus on analyzing and comparing ...
  • Understanding UAV cellular communications: from existing networks to massive MIMO
    Geraci, Giovanni; García Rodríguez, Adrián; Galati Giordano, Lorenzo; López Pérez, David; Björnson, Emil (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    The purpose of this article is to bestow the reader with a timely study of UAV cellular communications, bridging the gap between the 3GPP standardization status quo and the more forward-looking research. Special emphasis ...
  • What will the future of UAV cellular communications be? a flight from 5G to 6G
    Geraci, Giovanni; Garcia-Rodriguez, Adrian; Azari, M. Mahdi; Lozano Solsona, Angel; Mezzavilla, Marco; Chatzinotas, Symeon; Chen, Yun; Rangan, Sundeep; Renzo, Marco di (Institute of Electrical and Electronics Engineers (IEEE), 2022)
    What will the future of UAV cellular communications be? In this tutorial article, we address such a compelling yet difficult question by embarking on a journey from 5G to 6G and expounding a large number of case studies ...

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