Ara es mostren els items 13-32 de 39

    • Examen final 

      Valenzuela González, José Luis; Sánchez González, Juan (Universitat Politècnica de Catalunya, 2018-06-06)
      Examen
      Accés restringit a la comunitat UPC
    • Examen final 

      Valenzuela González, José Luis (Universitat Politècnica de Catalunya, 2019-01-17)
      Examen
      Accés restringit a la comunitat UPC
    • Examen final 

      Valenzuela González, José Luis (Universitat Politècnica de Catalunya, 2018-06-11)
      Examen
      Accés restringit a la comunitat UPC
    • Examen MQ 

      Valenzuela González, José Luis (Universitat Politècnica de Catalunya, 2018-04-11)
      Examen
      Accés restringit a la comunitat UPC
    • Examen MQ 

      Valenzuela González, José Luis (Universitat Politècnica de Catalunya, 2018-11-06)
      Examen
      Accés restringit a la comunitat UPC
    • Examen MQ 

      Valenzuela González, José Luis; Sánchez González, Juan (Universitat Politècnica de Catalunya, 2018-04-06)
      Examen
      Accés restringit a la comunitat UPC
    • Experimental study of Bluetooth, ZigBee and IEEE 802.15.4 technologies on board high-speed trains 

      Higuera, Jorge; Kartsakli, Elli; Valenzuela González, José Luis; Alonso Zárate, Luis Gonzaga; Laya Romero, Andrés Ernesto; Martínez, Raquel; Aguilar, Alicia (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper studies the feasibility of using low-power wireless technologies such as Bluetooth, IEEE 802.15.4 and ZigBee in high-speed railway scenarios that involve bidirectional ground-to-train communication. The presented ...
    • Experimental study of bluetooth, ZigBee and IEEE 802.15.4 technologies on board high-speed trains 

      Higuera Portilla, Jorge Eduardo; Kartsakli, Elli; Valenzuela González, José Luis; Alonso Zárate, Luis Gonzaga; Laya Romero, Andrés Ernesto; Martínez, Raquel; Aguilar, Alicia (2012)
      Article
      Accés restringit per política de l'editorial
      This paper studies the feasibility of using low-power wireless technologies such as Bluetooth, IEEE 802.15.4 and ZigBee in high-speed railway scenarios that involve bidirectional ground-to-train communication. The ...
    • Filtenna integration achieving ideal chebyshev return losses 

      Hueltes Escobar, Alberto; Verdú Tirado, Jorge Andrés; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; Rocas Cantenys, Eduard; Valenzuela González, José Luis (2014-04-01)
      Article
      Accés obert
      This paper demonstrates that it is possible to find an ideal filter response (Chebyshev, Butterworth,..) considering the antenna as the last resonator of a filter under certain circumstances related with the antenna ...
    • Help4Mood: a computational distributed system to support the treatment of patients with major depression 

      Pérez Díaz de Cerio, David; Valenzuela González, José Luis; Ruiz Boqué, Sílvia; García Lozano, Mario; Colomé, Josep Maria (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A closed loop approach supporting the control, communication and treatment management of patients with Major Depression is presented, based on a distributed system with three main components: a Personal Monitoring System, ...
    • La evaluación en PBL: un caso práctico 

      García Lozano, Mario; Pérez Díaz de Cerio, David; Valenzuela González, José Luis; Gelonch Bosch, Antonio José; Alonso Zárate, Luis Gonzaga; Ruiz Boqué, Sílvia (2008)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Las ventajas de estructurar una asignatura, un conjunto o incluso todo un plan de estudios mediante Aprendizaje Basado en Proyectos (PBL) han sido ampliamente expuestas de forma teórica y práctica ...
    • Low-cost test measurement setup for real IoT BLE sensor device characterization 

      Pérez Díaz de Cerio, David; Hernandez Solana, Angela; Valdovinos, Antonio; Olmos Bonafé, Juan José; Valenzuela González, José Luis (2019-03-01)
      Article
      Accés obert
      The methodology presented in this paper aims to characterize impairments shown by real devices which are usually neglected on standardized tests but that become very important in massive IoT scenarios. For instance, we ...
    • Multipolling and OFDMA Reservation Protocol for IEEE 802.11 Networks 

      Pérez Díaz de Cerio, David; Valenzuela González, José Luis; Villares Piera, Nemesio Javier (Institute of Electrical and Electronic Engineers, 2009)
      Text en actes de congrés
      Accés obert
      This paper presents an efficient multipolling scheme that improves the IEEE 802.11 MAC protocol efficiency and does not suffer from the hidden terminal problem or inefficient channel usage problems. To design an efficient ...
    • On the feasibility of Bluetooth, Zigbee and IEEE 802.15.4 technologies on board high speed trains 

      Higuera Portilla, Jorge Eduardo; Kartsakli, Elli; Valenzuela González, José Luis; Alonso Zárate, Luis Gonzaga (2011)
      Text en actes de congrés
      Accés obert
      This paper studies the feasibility of using low-power wireless technologies such as Bluetooth, IEEE 802.15.4 and ZigBee in high-speed railway scenarios that involve bidirectional land-to-train communication. The presented ...
    • On the use of sniffers for spectrum occupancy measurements of Bluetooth low energy primary channels 

      Valenzuela Pérez, Ana; García Lozano, Mario; Valenzuela González, José Luis; Pérez Díaz de Cerio, David; Hernandez Solana, Angela; Valdovinos, Antonio (Elsevier, 2022-08-01)
      Article
      Accés obert
      The methods usually employed to measure channel occupancy show limitations in the context of Bluetooth Low Energy (BLE) advertisements. We propose and analyze the use of BLE sniffers as light and portable low-cost spectrum ...
    • Opportunistic scheduling using an enhanced channel state information update scheme for WLAN systems with DQCA 

      Higuera Portilla, Jorge Eduardo; Kartsakli, Elli; Valenzuela González, José Luis; Alonso Zárate, Luis Gonzaga (Institute of Electrical and Electronics Engineers (IEEE), 2007)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      This paper studies the feasibility of using low-power wireless technologies such as Bluetooth, IEEE 802.15.4 and ZigBee in high-speed railway scenarios that involve bidirectional ground-to-train communication. The presented ...
    • Performance of adaptive bayesian equalizers in outdoor environments 

      Valenzuela González, José Luis; Casadevall Palacio, Fernando José (IEEE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, INC., 1997)
      Text en actes de congrés
      Accés obert
      Outdoor communications are affected by multipath propagation that imposes an upper limit on the system data rate and restricts possible applications. In order to overcome the degrading effect introduced by the channel, ...
    • Performance of blind equalization with higher order statistics in indoor radio environments 

      Valenzuela González, José Luis; Valdominos Bardají, Antonio; Casadevall Palacio, Fernando José (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1997-05)
      Article
      Accés obert
      This paper analyzes the performance of blind equalization using the complex cepstrum of third-order moments applied to 4-QAM time division multiple access (TDMA) indoor radio communication systems. In particular, we have ...
    • Performance of Blind Equalization with Higher Order Statistics in Indoor Radio Environments 

      Valenzuela González, José Luis; Valdominos Bardají, Antonio; Casadevall Palacio, Fernando José (1997-05)
      Article
      Accés obert
      This paper analyzes the performance of blind equalization using the complex cepstrum of third-order moments applied to 4-QAM time division multiple access (TDMA) indoor radio communication systems. In particular, we have ...
    • Principios de comunicaciones móviles 

      Sallent Roig, Oriol; Valenzuela González, José Luis; Agustí Comes, Ramon (Edicions UPC, 2003)
      Llibre
      Accés restringit als usuaris de la UB, UAB, UPC, UPF, UdG, UdL, URV, UOC, BC, UVic, UJI, URL, UIC
      En este libro se presentan los aspectos fundamentales que intervienen en los sistemas de comunicaciones móviles, al objeto de facilitar la comprensión de los principios de funcionamiento y los requerimientos tanto actuales ...