Exploració per tema "UMTS (Universal Mobile Telecommunications System)"

Ara es mostren els items 21-28 de 28

    • Measurement-based LoS/NLoS channel modeling for hot-spot urban scenarios in UMTS networks 

      Chen, Jiajing; Yin, Xuefeng; Tian, Li; Zhang, Nan; He, Yonguy; Cheng, Xiang; Duan, Weiming; Ruiz Boqué, Sílvia (2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this contribution, a measurement campaign is introduced for modeling radio channels with either Line-of-Sight (LoS) or Non-Line-of-Sight (NLoS) connection between a user equipment (UE) and a NodeB (NB) in an operating ...

    • Planning the base station layout in UMTS urban scenarios: a simulation approach to coverage and capacity estimation 

      Zola, Enrica Valeria; Barceló Arroyo, Francisco (José Neuman de Souza, Petre Dini, Pascal Lorenz, 2004)
      Article / Text en actes de congrés
      Accés obert
      This paper analyzes the performance of a base station layout for a UMTS network in a densely populated city. The study is carried out using snapshot simulations of an actual city (Barcelona, Spain) with specific traffic ...

    • Robust error detection methods for H.264/AVC videos 

      Rodríguez Rodríguez, Eva (Universitat Politècnica de Catalunya, 2008-09-23)
      Projecte Final de Màster Oficial
      Accés obert
      The 3rd generation of mobile systems is mainly focused on enabling multimedia services such as video streaming, video call and conferencing. In order to achieve this, the Universal Mobile Telecommunications System (UMTS), ...

    • RRM strategies study to background services in UMTS network 

      Pérez Cano, Antonio (Universitat Politècnica de Catalunya, 2008-04-04)
      Projecte/Treball Final de Carrera
      Accés restringit per decisió de l'autor
      The proposed PFC is in the framework of Radio Resources Management and Quality of Service (QoS) for CDMA based radio access networks (such as UMTS). One of the fundamental facts of these systems is to provide different ...

    • Smart antennas in software radio base stations 

      Pérez Neira, Ana Isabel; Mestre Pons, Francesc X.; Rodríguez Fonollosa, Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-02-28)
      Article
      Accés obert
      The application of adaptive antenna techniques to fixed-architecture base stations has been shown to offer wide-ranging benefits, including interference rejection capabilities or increased coverage and spectral ...

    • UMTS-WiFi switchable bandpass filter 

      Brito Brito, Zabdiel; Llamas Garro, Ignacio; Navarro Muñoz, Guillem; Perruisseau Carrier, Julien; Pradell i Cara, Lluís (2009)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper a reconfigurable bandpass filter able to switch between WiFi and UMTS transmit band standards is presented. The filter is designed in such a way that center frequency and bandwidth specifications are precisely ...

    • UTRAN optimisation features validation 

      Pérez Robles, Eva María (Universitat Politècnica de Catalunya, 2011-07-27)
      Projecte/Treball Final de Carrera
      Accés restringit per decisió de l'autor
      English: The scope of the project is to validate a group of features to improve the UMTS radio access network. The main objective of this validation is to ensure the correct functionality and good performance of these ...

    • Web browsing optimization over 2.5G and 3G: end-to-end mechanisms vs. usage of performance enhancing proxies 

      Gómez Montenegro, Carlos; Catalán Cid, María Luisa; Viamonte Solé, David; Paradells Aspas, Josep; Calveras Augé, Anna M. (2008-02)
      Article
      Accés obert
      2.5 Generation (2.5G) and Third Generation (3G) cellular wireless networks allow mobile Internet access withbearers specifically designed for data communications. However, Internet protocols under-utilize wireless widearea ...