Now showing items 1-20 of 143

  • Acoustic wave filters for enhanced performance 

    Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; Hueltes Escobar, Alberto; Perea Robles, Rafael; Aigner, Robert; Khlat, Nadim (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference lecture
    Restricted access - publisher's policy
    This paper presents a novel filter configuration based on acoustic wave resonators that allows to obtain filter responses unachievable with the well established ladder configuration, such as arbitrary position of transmission ...
  • Advanced interference mitigation techniques for the forward link of multi-beam broadband satellite systems 

    Devillers, Bertrand; Pérez Neira, Ana Isabel (2011)
    Conference report
    Restricted access - publisher's policy
    High throughput satellite systems are expected to rely in the user link on multi-beam architectures with small beam footprints and strong frequency reuse among beams, and will therefore operate in an interference limited ...
  • A lightweight algorithm for traffic filtering over sliding windows 

    Sanjuàs Cuxart, Josep; Barlet Ros, Pere; Solé Pareta, Josep; Andriuzzi, Gabriella (2012)
    Conference report
    Restricted access - publisher's policy
    The problem of testing whether a packet belongs to a set of filtered addresses has been traditionally addressed using Bloom filters. They have a small memory footprint and require few memory accesses per query and insertion, ...
  • Alternativas de despliegue y asignación de espectro para las redes radio de emergencia de banda ancha 

    Cerrato, Javier Alonso; Ferrús Ferré, Ramón Antonio; Sallent Roig, José Oriol (2015-07-01)
    Article
    Open Access
    La definición e implementación de una solución de banda ancha móvil que satisfaga las necesidades operativas de los cuerpos de seguridad pública y de emergencias (PPDR – Public Protection and Disaster Relief) es esencial ...
  • Ampliació i sobredimensionament d'una xarxa per a suportar serveis de banda ampla 

    Gràcia i Ferré, Marc de (Universitat Politècnica de Catalunya, 2007-01-20)
    Master thesis (pre-Bologna period)
    Open Access
    Actualmente, algunas de las redes de control y gestión de distribución de servicios básicos a los hogares (por ejemplo luz, televisión por cable, telefonía, etc.) son redes de capacidad muy limitada. Esto se debe a la ...
  • Anàlisi i implementació de tècniques de formació d'imatge i localització UWB 

    Guardiola Garcia, Marta (Universitat Politècnica de Catalunya, 2008-07-25)
    Master thesis (pre-Bologna period)
    Open Access
  • Análisis Tecno-Económico del despliegue de redes móviles de banda ancha para servicios de seguridad pública y emergencias 

    Solano Cortada, Daniel; Carretero Alfaro, Javier (Universitat Politècnica de Catalunya, 2013-09-06)
    Master thesis (pre-Bologna period)
    Open Access
    [ANGLÈS] The aim of this project is to renew the technology used by public safety agencies. The mobile broadband will let to the public safety personnel to assist the society in both quicker and more effective way. Nowadays, ...
  • Analysis of WMN-HC simulation system data using Friedman test 

    Sakamoto, Shinji; Lala, Algenti; Oda, Tetsuya; Kolici, Vladi; Barolli, Leonard; Xhafa Xhafa, Fatos (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference report
    Open Access
    With the fast development of wireless technologies, Wireless Mesh Networks (WMNs) are becoming an important networking infrastructure due to their low cost and increased high speed wireless Internet connectivity. In this ...
  • A novel SWB antenna with triple band-notches based on elliptical slot and rectangular split ring resonators 

    Zhang, Xiaobo; Ur, Saeed; Cao, Qunsheng; Gil Galí, Ignacio; khan, Muhammad Irshad (2019-02-10)
    Article
    Open Access
    In this paper, a wideband antenna was designed for super-wideband (SWB) applications. The proposed antenna was fed with a rectangular tapered microstrip feed line, which operated over a SWB frequency range (1.42 GHz to 50 ...
  • Antena impresa de banda ancha 

    Pérez, Luis Andrés; Romeu Robert, Jordi (Unión Científica Internacional de Radio (URSI), 1990)
    Conference report
    Open Access
  • Antenna reconfigurability based on a novel parasitic pixel layer 

    Rodrigo López, Daniel; Damgaci, Yasin; Unlu, M.; Cetiner, Bedri Artug; Romeu Robert, Jordi; Jofre Roca, Lluís (2011)
    Conference report
    Restricted access - publisher's policy
    A novel reconfiguration method based in the use of pixel surfaces as parasitic elements is presented. This concept can be used to provide reconfigurability to a wide variety of non-reconfigurable antennas without requiring ...
  • APD radiated transient measurements produced by electric sparks employing time-domain captures 

    Pous Solà, Marc; Silva Martínez, Fernando (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    Electric sparks phenomena produce electromagnetic radiated transient noise which is one of the main interference causes that disturb digital communication systems such as DVB-T or GSM-R. Detectors and methodologies defined ...
  • Application of WMN-SA simulation system for node placement in Wireless Mesh Networks: a case study for a realistic scenario 

    Sakamoto, Shinji; Lala, Algenti; Oda, Tetsuya; Kolici, Vladi; Barolli, Leonard; Xhafa Xhafa, Fatos (2014)
    Article
    Restricted access - publisher's policy
    One of the key advantages of Wireless Mesh Networks (WMNs) is their importance for providing cost-efficient broadband connectivity. In WMNs, there are issues for achieving the network connectivity and user coverage, which ...
  • Application of WMN-SA simulation system for WMN node placement in a realistic scenario 

    Sakamoto, Shinji; Oda, Tetsuya; Barolli, Leonard; Ikeda, Makoto; Xhafa Xhafa, Fatos; Uchida, Kazunori (2015)
    Conference report
    Open Access
    One of the key advantages of Wireless Mesh Networks (WMNs) is their importance for providing cost efficient broad band connectivity. In WMNs, there are issues for achieving the network connectivity and user coverage, which ...
  • A reliable system for JXTA-Overlay P2P platform considering number of authentic files, security and QoS parameters 

    Liu, Yi; Elmazi, Donald; Sakamoto, Shinji; Barolli, Leonard; Xhafa Xhafa, Fatos; Uchida, Kazunori (2015)
    Conference report
    Open Access
    The reliability of peers is very important for safe communication in Peer-to-Peer (P2P) systems. The reliability of a peer can be evaluated based on the reputation and interactions with other peers to provide different ...
  • Arquitecturas de transmisión inalámbrica de alta eficiencia 

    Gilabert Pinal, Pere Lluís; García, José Angel; de Mingo, Jesús; Montoro López, Gabriel; Cabria, Lorena; Marante, Reinel; García, Paloma; Sánchez, César; Bertran Albertí, Eduardo (2011)
    Conference report
    Open Access
  • Assessment of direct positioning for IR-UWB in IEEE 802.15.4a channels 

    Navarro, Mònica; Closas, Pau; Nájar Martón, Montserrat (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference report
    Restricted access - publisher's policy
    This paper assesses the problem of localization in IR-UWB under realistic channel models for Direct Position Estimation (DPE) approaches. DPE schemes have been proposed for positioning and localization for well developed ...
  • A systematic method to design broadband matching networks 

    Andújar Linares, Aurora; Anguera Pros, Jaume; Puente Baliarda, Carles (Institute of Electrical and Electronics Engineers (IEEE), 2010)
    Conference report
    Open Access
    The narrow bandwidth (BW) associated to small antennas featured by a high quality factor (Q) can be enhanced by the addition of a matching network. However, the impedance matching is a difficult and time-consuming process ...
  • ATM inverse multiplexing. Fundamentals and Markovian single-server queue analysis for performance evaluation and validation purposes 

    Aguilar Igartua, Mónica; Postigo Boix, Marcos; García Haro, Juan (2002)
    Article
    Restricted access - publisher's policy
    The growing demand of network bandwidth indicates that user access to high speed (i.e. ATM) networks is a key issue. The Inverse Multiplexing for ATM (IMA) is a technology that combines multiple T1/E1 links to support the ...
  • Bandwidth extension of narrowband speech 

    Expósito Pérez, Miquel; Salavedra Molí, Josep (Universidad Politécnica de Valencia, 2014)
    Conference report
    Open Access
    Recently, 4G mobile phone systems have been designed to process wideband speech signals whose sampling frequency is 16 kHz. However, most part of mobile and classical phone network, and current 3G mobile phones, still ...