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Ara es mostren els items 1-20 de 112

    • A metaheuristic-based downlink power allocation for LTE/LTE-A cellular deployments 

      González González, David; García Lozano, Mario; Ruiz Boqué, Sílvia; Lee, Dong Seop (2014-08)
      Article
      Accés restringit per política de l'editorial
      The explosive growth of cellular networks makes their deployment and maintenance more and more complex, time consuming, and expensive. Self-Organizing Networks have been recognized as a promising way to alleviate this ...

    • A novel ICIC-oriented channel state information feedback scheme for aperiodic reporting in LTE 

      González González, David; García Lozano, Mario; Ruiz Boqué, Sílvia; Olmos Bonafé, Juan José (2012)
      Text en actes de congrés
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      In moderm OFDMA-based cellular networks, intercell interference is the main issue limiting the capacity of these systems. Recently, intensive research work has been focused on intercell interference coordination as it ...

    • A novel multiobjective framework for cell switch-off in dense cellular networks 

      González González, David; Yanikomeroglu, Halim; García Lozano, Mario; Ruiz Boqué, Sílvia (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
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      The green communications paradigm has been receiving much attention in wireless networks in recent years. More specifically, in the context of cellular communications, the concept of Cell Switch Off (CSO) has been recognized ...

    • A novel multiobjective framework for cell switch-off in dense cellular networks 

      González González, David; Yanikomeroglu, Halim; García Lozano, Mario; Ruiz Boqué, Sílvia (2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The green communications paradigm has been receiving much attention in wireless networks in recent years. More specifically, in the context of cellular communications, the concept of Cell Switch Off (CSO) has been ...

    • A wireless sensor network design for the Help4Mood european project 

      Pérez Díaz de Cerio, David; Ruiz Boqué, Sílvia; Rosell Ferrer, Francisco Javier; Ramos Castro, Juan José; Castro Robles, Joan Carles (VDE Conference Publications, 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Help4Mood is a closed loop approach supporting the control, communication and treatment management of patients with Major Depression. The first out of the three main components of the Help4Mood solution is the Personal ...

    • Acte inaugural de l'acció europea COST IC1004: Cooperative Radio Communications for Green Smart Environments 

      Giró Roca, Antoni; Alsina Català, Claudi; Cardona, Narcís; Ruiz Boqué, Sílvia (2012-02-08)
      Audiovisual
      Accés obert

    • Adapting fractional frequency reuse to realistic OFDMA cellular networks 

      González González, David; García Lozano, Mario; Ruiz Boqué, Sílvia; Lema, Maria A.; Lee, Dong Seop (2013)
      Text en actes de congrés
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      Effective intercell interference (ICI) mitigation has been identified as a key challenge for emerging OFDMA cellular technologies such as Long Term Evolution (LTE). In order to address this issue, mobile operators have ...

    • Admission control in LTE uplink systems with sounding reference signals based channel state indicator 

      Lema, Maria A.; Ramon Ferran, Sergi; García Lozano, Mario; Ruiz Boqué, Sílvia; Olmos Bonafé, Juan José (2012)
      Text en actes de congrés
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      This article focuses on the investigation of the Admission Control techniques in order to assure Quality of Service (QoS) in Long Term Evolution (LTE) systems. So as to estimate the users bandwidth requirement, Sounding ...

    • An analytical view of static intercell interference coordination techniques in OFDMA networks 

      González González, David; García Lozano, Mario; Ruiz Boqué, Sílvia; Olmos Bonafé, Juan José (IEEE, 2012)
      Text en actes de congrés
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      This paper presents a novel methodology to assess the downlink performance of static intercell interference coordination techniques in the context of OFDMA-based cellular networks. In the last few years, interference ...

    • Aprendizaje basado en proyectos: cómo empezar ya 

      Ruiz Boqué, Sílvia; Valero García, Miguel (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2011-02-02)
      Comunicació de congrés
      Accés obert

    • Attitude estimation for base station antennas based on downlink channel statistics 

      Ling, Cen; He, Yonguy; Yin, Xuefeng; Zhong, Zhimeng; Duan, Weiming; Ruiz Boqué, Sílvia (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this contribution, a maximum-likelihood-based approach is proposed for estimating the attitudes of sectoring base station (BS) antennas based on the power of the received signals observed by multiple user equipments ...

    • Attitude estimation for in-service base station antenna using downlink channel fading statistics 

      Ling, Cen; Yin, Xuefeng; Yongyu, He; Ruiz Boqué, Sílvia (2015-01-01)
      Article
      Accés obert
      Amaximum-likelihood-estimation method is proposed for extracting the attitude of a sectoring base station (BS) antenna by using the received signal strengths observed by multiple user equipments (UEs) in this contribution. ...

    • Average power prediction in microcells 

      Ruiz Boqué, Sílvia; Fernández, M (Institute of Electrical and Electronics Engineers (IEEE), 1994)
      Text en actes de congrés
      Accés obert
      A propagation model to estimate the average received power in an urban microcell environment has been developed. This model can be used both in line of sight (LOS) and non line of sight (NLOS) conditions in any regular or ...

    • CA2-MN6: Final exam: spring 2019 

      Ruiz Boqué, Sílvia (Universitat Politècnica de Catalunya, 2019-06-05)
      Examen
      Accés restringit a la comunitat UPC

    • Cancelación del ruido AM en sistemas de transmisión coherentes por fibra óptica: receptor balanceado 

      Ruiz Boqué, Sílvia; Junyent Giralt, Gabriel (Institución ferial de Madrid (IFEMA), 1988)
      Text en actes de congrés
      Accés obert
      In this work the authors have studied the AM noise influence over coherent transmission systems employing heterodyne-type detection. A dual-detector optical heterodyne receiver is also studied in arder to eliminate the LO ...

    • Capacity and coverage trade-off in WCDMA environments with repeaters deployment 

      García Lozano, Mario; Alonso Zárate, Luis Gonzaga; Casadevall Palacio, Fernando José; Ruiz Boqué, Sílvia (WPMC, 2005)
      Comunicació de congrés
      Accés obert
      This work derives the analytic expression of the feasibility condition for the uplink of a WCDMA mobile communications system with repeaters deployment in a multiservice environment with a general heterogeneous layout. ...

    • Capacity and coverage tradeoff in WCDMA environments with repeaters deployment 

      García Lozano, Mario; Alonso Zárate, Luis Gonzaga; Casadevall Palacio, Fernando José; Ruiz Boqué, Sílvia (Institute of Electrical and Electronics Engineers (IEEE), 2005-09-30)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      This paper derives the analytic expression of the feasibility condition for the uplink of a WCDMA mobile communications system with repeaters in a multiservice environment with a general heterogeneous layout. In particular, ...

    • Capacity and coverage tradeoff in WCDMA environments with repeaters deployment. 

      García Lozano, Mario; Alonso Zárate, Luis Gonzaga; Casadevall Palacio, Fernando José; Ruiz Boqué, Sílvia (2007-02)
      Article
      Accés obert

    • Channel maps and stochastic models in elevation based on measurements in operating networks 

      Yu, Jiwei; Yin, Xuefeng; Chen, Jiajing; Zhang, Nan; Zhong, Zhimeng; Duan, Weiming; Ruiz Boqué, Sílvia (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this contribution, a channel measurement campaign recently carried out in the Jiading campus of Tongji University, Shanghai, China, is introduced. The downlink signals of an active Universal Mobile Telecommunications ...

    • Chip level simulation of the downlink in UTRA-FDD 

      Olmos Bonafé, Juan José; Ruiz Boqué, Sílvia (Institute of Electrical and Electronics Engineers (IEEE), 2000)
      Text en actes de congrés
      Accés obert
      The specifications of UMTS Terrestrial Radio Access (UTRA) for the physical layer of the downlink make use of orthogonal variable spreading factor (OVSF) codes to preserve the orthogonality between downlink channels of ...