Now showing items 1-20 of 26

  • Active and reactive power strategies with peak current limitation for distributed generation inverters during unbalanced grid faults 

    Camacho Santiago, Antonio; Castilla Fernández, Miguel; Miret Tomàs, Jaume; Borrell Sanz, Angel; García de Vicuña Muñoz de la Nava, José Luis (Institute of Electrical and Electronics Engineers (IEEE), 2015-03-01)
    Article
    Open Access
    Distributed generation inverters have become a key element to improve grid efficiency and reliability, particularly during grid faults. Under these severe perturbations, inverter-based power sources should accomplish ...
  • An active power synchronization control loop for grid-connected converters 

    Remón, D.; Mir Cantarellas, Antonio; Rakhshani, Elyas; Candela García, José Ignacio; Rodríguez Cortés, Pedro (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    The increasing penetration of renewable energy sources in power systems requires new control systems that provide services similar to those of conventional generators. This paper proposes an active power controller that ...
  • An LMI approach to H_ synchronization of second-order neutral master-slave systems 

    Reza Karimi, Hamid; Zapateiro, Mauricio; Luo, Ningsu; Rossell Garriga, Josep Maria (American Automatic Control Council, 2009-06-10)
    Conference report
    Open Access
    The H_ synchronization problem of the master and slave structure of a second-order neutral master-slave systems with time-varying delays is presented in this paper. Delaydependent sufficient conditions for the design of a ...
  • Cooperative signal amplification for molecular communication in nanonetworks. 

    Abadal Cavallé, Sergi (Universitat Politècnica de Catalunya, 2011-09-19)
    Master thesis
    Open Access
    English: Nanotechnology is enabling the development of devices in a scale ranging from a few to hundreds of nanometers. Communication between these devices greatly expands the possible applications, increasing the complexity ...
  • Coordination of multi-agent Euler-Lagrange systems via energy-shaping: Networking improves robustness 

    Nuño, Emmanuel; Ortega, Romeo; Jayawardhana, Bayu; Basañez Villaluenga, Luis (2013-10-01)
    Article
    Restricted access - publisher's policy
    In this paper, the robust coordination of multi-agent systems via energy-shaping is studied. The agents are nonidentical, Euler–Lagrange systems with uncertain parameters which are regulated (with and without exchange of ...
  • Delay-induced synchronization phenomena in an array of globally coupled logistic maps 

    Martí, A. C.; Masoller Alonso, Cristina (2003-05)
    Article
    Open Access
    We study the synchronization of a linear array of globally coupled identical logistic maps. We consider a time-delayed coupling that takes into account the finite velocity of propagation of the interactions. We find globally ...
  • Delayed coupling of logistic maps 

    Masoller Alonso, Cristina; Cavalcante, Hugo; Rios Leite, José R. (2001-08)
    Article
    Open Access
    We study the synchronization of logistic maps in a one-way coupling configuration. The master system is coupled to the slave system with a delay n1, and the slave is a delayed logistic map with a delay n2. We show that ...
  • Design of highly synchronizable and robust networks 

    Estrada Roger, Ernesto; Gago Álvarez, Silvia; Caporossi, Gilles (2010-11)
    Article
    Restricted access - publisher's policy
    In this paper, the design of highly synchronizable, sparse and robust dynamical networks is addressed. Better synchronizability means faster synchronization of the oscillators, sparsity means a low ratio of links per ...
  • Digital Communication System with Multi-carrier Modulation (OFDM) for Power Line Communication 

    Ramírez Jávega, Francisco (Universitat Politècnica de Catalunya, 2008-10)
    Master thesis (pre-Bologna period)
    Open Access
    Se propone el un diseño para un receptor OFDM. El esquema de sincronismo esta dividido en cuatro partes para estimar el sincronismo de los simboles, el offset frecuencial y el canal de transmision. Se implementa un esquema ...
  • Feasibility study of geosynchronous SAR satellites 

    Guzmán Bofarull, Marc (Universitat Politècnica de Catalunya, 2014-07-11)
    Master thesis (pre-Bologna period)
    120 months embargo
    [ANGLÈS] The project is a feasibility study of a new mission concept of Earth Observation based on GEOsynchronous SAR satellites (GEOSAR). More specifically the bistatic GEOSAR is analysed, with the transmitter and receiver ...
  • Hardware-efficient implementation of a femtocell/macrocell interference-mitigation technique for high-performance LTE-based systems 

    Font Bach, Oriol; Bartzoudis, Nikolaos; Pascual Iserte, Antonio; Payaró Llisterri, Miquel (2013)
    Conference report
    Restricted access - publisher's policy
    This paper presents the FPGA design of an interference-aware digital front end tailored for heterogeneous multi-cell LTE-based systems. A resource-optimized RTL architecture has been implemented and validated under realistic ...
  • Identification of Obstructive Sleep Apnea patients from tracheal breath sound analysis during wakefulness in polysomnographic studies 

    Solà Soler, Jordi; Fiz Fernández, José Antonio; Torres Cebrián, Abel; Jané Campos, Raimon (2014)
    Conference report
    Restricted access - publisher's policy
    Obstructive Sleep Apnea (OSA) is currently diagnosed by a full nocturnal polysomnography (PSG), a very expensive and time-consuming method. In previous studies we were able to distinguish patients with OSA through formant ...
  • Maximum likelihood estimation of position in GNSS 

    Closas Gómez, Pau; Fernández Prades, Carlos; Fernández Rubio, Juan Antonio (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-05)
    Article
    Open Access
    In this letter, we obtain the Maximum Likelihood Estimator of position in the framework of Global Navigation Satellite Systems. This theoretical result is the basis of a completely different approach to the positioning ...
  • Phase-Coherence Transitions and Communication in the Gamma Range between Delay-Coupled Neuronal Populations 

    Barardi, Alessandro; Sancristóbal Alonso, Belén de; García Ojalvo, Jordi (2014-07-01)
    Article
    Open Access
    Synchronization between neuronal populations plays an important role in information transmission between brain areas. In particular, collective oscillations emerging from the synchronized activity of thousands of neurons ...
  • Precision timing in TDMA - based Wireless Sensor Network through IEEE 1588 standard 

    Toma, Daniel; Río Fernandez, Joaquín del; Manuel Lázaro, Antonio; Gomáriz Castro, Spartacus; Carreras Pons, Normandino (2013)
    Conference report
    Open Access
    This paper proposes an energy-efficient time synchronization scheme for Wireless Sensor Networks(WSNs) based on the IEEE 1588 standard. Although a number of methods have been studied for time synchronization of WSNs, some ...
  • Role of frequency mismatch in neuronal communication through coherence 

    Sancristóbal Alonso, Belén de; Vicente, Raul; García Ojalvo, Jordi (2014-02-12)
    Article
    Restricted access - publisher's policy
    Neuronal gamma oscillations have been described in local field potentials of different brain regions of multiple species. Gamma oscillations are thought to reflect rhythmic synaptic activity organized by inhibitory ...
  • Self-powered high-rate wireless sensor network for underground high voltage power lines 

    Mihai Toma, Daniel; Río Fernandez, Joaquín del; Manuel Lázaro, Antonio (IEEE, 2012)
    Conference report
    Restricted access - publisher's policy
    The use of Wireless Sensor Networks (WSNs) are a promising technology that can enhance various aspects of today’s electric power systems, including generation, delivery, and utilization, making them a vital component ...
  • Synchronization processes and synchronizer mechanisms in manual transmissions 

    Pastor bedmar, Ana (Universitat Politècnica de Catalunya, 2012)
    Master thesis (pre-Bologna period)
    Open Access
    The transmission system is one of the main parts that determines the behavior, power and fuel economy of a vehicle. Transmission performance is usually related to gear e ciency, gear noise and gear shift comfort during ...
  • Synchronization via clustering in a small delay-coupled laser network 

    Martínez González, Cristina; Masoller Alonso, Cristina; Torrent Serra, Maria del Carmen; García Ojalvo, Jordi (2007-09)
    Article
    Restricted access - publisher's policy
  • Synchronizing sampling and actuation in the absence of global time in networked control systems 

    Martí Colom, Pau; Camacho Santiago, Antonio; Velasco García, Manel; Marès Martí, Pere; Fuertes Armengol, José Mª (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
    Conference report
    Restricted access - publisher's policy
    The successful operation of Networked Control Sys- tems (NCS) requires employing appropriate approaches for dealing with network induced time delays, i.e. time intervals elapsed from consecutive sampling and actua- tion ...