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392 research outcomes, page 2 of 40
  • publication . Article . 2015
    Open Access English
    Authors:
    Rodolfo Oliveira; Miguel Luis; Luis Bernardo; Rui Dinis;
    Publisher: Springer
    Project: FCT | SFRH/BD/68367/2010 (SFRH/BD/68367/2010), FCT | UID/EEA/50008/2013 (147328)

    This work presents a novel Medium Access Control (MAC) algorithm for single-hop distributed wireless networks, MyopicMAC, which is designed to maximize the network throughput performance. In our scheme, all nodes adopt a common optimal contention window avoiding message...

  • publication . Article . Conference object . 2017
    Open Access English
    Authors:
    Miguel Luis; Rodolfo Oliveira; Rui Dinis; Luis Bernardo;
    Publisher: IEEE
    Project: FCT | UID/EEA/50008/2013 (147328)

    In this paper, we characterize the radio frequency spectrum opportunities available in a common global system for mobile communications (GSM) channel to support the operation of a cognitive radio network (CRN). In a first step, we describe the technical details involved...

  • publication . Article . Other literature type . 2016
    Open Access English
    Authors:
    Francisco Rosario; Francisco A. Monteiro; Antonio Rodrigues;
    Publisher: IEEE
    Project: FCT | UID/EEA/50008/2013 (147328)

    In this letter, methods and corresponding complexities for fast matrix inversion updates in the context of massive multiple-input multiple-output (MIMO) are studied. In particular, we propose an on-the-fly method to recompute the zero forcing (ZF) filter when a user is ...

  • publication . Master thesis . 2018
    Open Access Portuguese
    Authors:
    Marques, Ana Maria Peixoto Alegre;
    Project: FCT | UID/EEA/50008/2013 (147328)

    Este Relatório Final surge no âmbito do Mestrado em ensino do 1.º CEB e de Matemática e Ciências Naturais do 2.º CEB e reflete o trabalho realizado nos estágios anuais de 1.º e 2.º Ciclos do Ensino Básico. O Relatório está organizado em três componentes: a Introdução; a...

  • publication . Master thesis . 2018
    Open Access Portuguese
    Authors:
    Costa, Vasco Craveiro Vieira Teixeira da;
    Project: FCT | UID/EEA/50008/2013 (147328)

    Formations are the spatial organization of objects or entities according to some predefined pattern. They can be found in nature, in social animals such as fish schools, and insect colonies, where the spontaneous organization into emergent structures takes place. Format...

  • publication . Doctoral thesis . 2018
    Open Access English
    Authors:
    Proença, Jorge Daniel Leonardo;
    Project: FCT | UID/EEA/50008/2013 (147328)

    Tese no âmbito do doutoramento em Engenharia Electrotécnica e de Computadores, especialização em Computadores e Electrónica, apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra. The work detailed in this thesis proposes solutions to automatically...

  • publication . Conference object . 2018
    Open Access
    Authors:
    Silva, Bruno C.; Sousa, Sofia C.; Teixeira, Emanuel; Velez, Fernando;
    Publisher: IEEE
    Project: FCT | UID/EEA/50008/2013 (147328), FCT | EXCL/EEI-TEL/0067/2012 (124977)

    This work explores the viability of 5G New Radio spectrum sharing in Ultra High Frequency (UHF), Super High Frequency (SHF) and millimetre wavebands(mmWaves) in outdoor environments. In the mmWaves the linear cellular topology is considered while in the UHF/SHF bands ce...

  • publication . Preprint . Article . 2019
    Open Access English
    Authors:
    Ivan Miguel Pires; Nuno M Garcia; Nuno Pombo; Francisco Flórez-Revuelta; Susanna Spinsante; Maria Canavarro Teixeira; Eftim Zdravevski;
    Project: FCT | UID/EEA/50008/2013 (147328)

    The detection of the environment where the user is located, is of extreme use for the identification of Activities of Daily Living (ADL). ADL can be identified by use of the sensors available in many off-the-shelf mobile devices, including magnetic and motion, and the e...

  • publication . Part of book or chapter of book . 2016
    Open Access English
    Authors:
    Ali, Syed; Castanheira, Daniel; Silva, Adão; Gameiro, Atilio;
    Publisher: InTech
    Project: FCT | SFRH/BPD/95375/2013 (SFRH/BPD/95375/2013), FCT | UID/EEA/50008/2013 (147328)

    The deployment of small cells within the boundaries of a macro-cell is considered to be an effective solution to cope with the current trend of higher data rates and improved system capacity. In the current heterogeneous configuration with the mass deployment of small c...

  • publication . Article . Other literature type . Preprint . 2017
    Open Access
    Authors:
    Bournez, Olivier; Graça, Daniel; Pouly, Amaury;
    Publisher: Elsevier BV
    Project: EC | CID (731143), FCT | UID/EEA/50008/2013 (147328)

    We consider the General Purpose Analog Computer (GPAC), introduced by Claude Shannon in 1941 as a mathematical model of Differential Analysers, that is to say as a model of continuous-time analog (mechanical, and later one electronic) machines of that time. We extend th...

392 research outcomes, page 2 of 40
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