Exploració per autor "Rodríguez Fonollosa, Javier"Més informacióMés informació

Ara es mostren els items 12-31 de 96

    • Balancing egoistic and altruistic transmit beamforming in femtocell networks 

      Husso, Mika; Dowhuszko, Alexis; Hamalainen, K.; Pastore, Adriano; Rodríguez Fonollosa, Javier (Institute of Electrical and Electronics Engineers (IEEE), 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper, we study the balancing of egoistic (maximum-ratio, MR) and altruistic (zero-forcing, ZF) beamforming (BF) in femtocells through simulations. To investigate the achievable gains from operating between the ...

    • Blind channel estimation and data detection using hidden Markov models theory 

      Antón Haro, Carles; Rodríguez Fonollosa, José Adrián; Rodríguez Fonollosa, Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1997-01-01)
      Article
      Accés obert
      In this correspondence, we propose applying the hidden Markov models (HMM) theory to the problem of blind channel estimation and data detection. The Baum–Welch (BW) algorithm, which is able to estimate all the parameters ...

    • Blind multiuser deconvolution in fading and dispersive channels 

      Rodríguez Fonollosa, Javier; Rodríguez Fonollosa, José Adrián; Zvonar, Z; Vidal Manzano, José (. S.N., 1995)
      Text en actes de congrés
      Accés obert
      An adaptive near-far resistant technique for the blind joint multiuser identification and detection in asynchronous CDMA systems is analyzed in fading and dispersive GSM channels.

    • Blind multiuser detection using hidden markov models theory 

      Antón Haro, Carles; Rodríguez Fonollosa, José Adrián; Rodríguez Fonollosa, Javier (BOB WERNER IEEE, 1996)
      Text en actes de congrés
      Accés obert
      We present an adaptive algorithm based on the theory of hidden Markov models (HMM) which is capable of jointly detecting the users in a DS-CDMA system. The proposed technique is near-far resistant and completely blind in ...

    • Blind multiuser detection with array observations 

      Rodríguez Fonollosa, Javier; Zvonar, Z; Rodríguez Fonollosa, José Adrián; Catala, J (1998-01)
      Article
      Accés obert
      Cochannel interference is usually a major limitation to the performance of mobile wireless systems. Examples of different forms of cochannel interference include multi-access interference in CDMA systems and cochannel ...

    • Blind multiuser detection with probabilistic algorithms - application to underwater communications 

      Antón Haro, Carles; Rodríguez Fonollosa, José Adrián; Zvonar, Zaran; Rodríguez Fonollosa, Javier (IEEE IEEE, 1997)
      Text en actes de congrés
      Accés obert
      In this paper, two probabilistic adaptive algorithms for jointly detecting active users in a DS-CDMA system are compared. The first one, which is based on the theory of hidden Markov models (HMM) is proposed within the ...

    • Blind multiuser identification and detection in cdma systems 

      Rodríguez Fonollosa, Javier; Rodríguez Fonollosa, José Adrián; Zvonar, Z; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 1995)
      Text en actes de congrés
      Accés obert
      Multiuser detection in code division multiple access systems usually requires either knowledge of the transmitted signature sequences and channel state information or use of a known training sequence for adaptation. We ...

    • Capacity of MIMO Channels: asymptotic evaluation under correlated fading 

      Mestre Pons, Francesc X.; Rodríguez Fonollosa, Javier; Pagès Zamora, Alba Maria (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-06-30)
      Article
      Accés obert
      This paper investigates the asymptotic uniform power allocation capacity of frequency nonselective multiple-input multiple-output channels with fading correlation at either the transmitter or the receiver. We consider ...

    • Capacity results on frequency-selective Rayleigh MIMO channels 

      Pérez Palomar, Daniel; Lagunas Hernandez, Miguel A.; Rodríguez Fonollosa, Javier (European Commission, 2000)
      Text en actes de congrés
      Accés obert

    • Comparison of different transmit diversity space-time code algorithms 

      Gaspa Maynou, Roger; Rodríguez Fonollosa, Javier (European Commission, 2000)
      Text en actes de congrés
      Accés obert
      Recently, it has been proven that employing more than one transmit antenna increases channel throughput, and different strategies have been developed in order to achieve transmit diversity advantage. Space-time codes combine ...

    • Comunicaciones II : ejercicios resueltos 

      Cabrera-Bean, Margarita; Rodríguez Fonollosa, Javier; Fernández Rubio, Juan Antonio; Riba Sagarra, Jaume (Edicions UPC, 2005)
      Llibre
      Accés restringit a la comunitat UPC
      Este material constituye una recopilación de problemas de examen, resueltos por los profesores de la asignatura Comunicaciones 2, impartida en el segundo curso de los estudios de Ingeniería Técnica Superior de Telecomunicaciones ...

    • Day-ahead bidding strategies for demand-side expected cost minimization 

      Atzeni, Italo; García Ordoñez, Luis; Scutari, Gesualdo; Palomar, D.P.; Rodríguez Fonollosa, Javier (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Day-ahead DSM techniques in the smart grid allow the supply-side to know in advance an estimation of the amount of energy to be provided to the demand-side during the upcoming day. However, a pure day-ahead optimization ...

    • Decentralized weighted sum rate maximization in MIMO-OFDMA femtocell networks 

      Agustín de Dios, Adrián; Vidal Manzano, José; Muñoz Medina, Olga; Rodríguez Fonollosa, Javier (2012)
      Text en actes de congrés
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      We propose a decentralized strategy for downlink interference management in overlaid MIMO femtocell-macrocell deployments operating in the same band under OFDMA access. The resource allocation, consisting of MIMO precoders ...

    • Demand-side management via distributed energy generation and storage optimization 

      Atzeni, Italo; García Ordoñez, Luis; Scutari, Gesualdo; Palomar, Daniel P.; Rodríguez Fonollosa, Javier (Institute of Electrical and Electronics Engineers (IEEE), 2013-06)
      Article
      Accés restringit per política de l'editorial
      Demand-side management, together with the integration of distributed energy generation and storage, are considered increasingly essential elements for implementing the smart grid concept and balancing massive energy ...

    • Desplegament de recursos en línea per a l’avaluació i l’autoaprenentage dels alumnes, i foment de l’especialització i competències transversals en el màster MERIT 

      Pradell i Cara, Lluís; Cardama Aznar, Ángel; Canal Bienzobas, Fernando; Jofre Roca, Lluís; Junyent Giralt, Gabriel; Herranz Luis, Jaime; Mallorquí Franquet, Jordi Joan; Nadeu Camprubí, Climent; Pagès Zamora, Alba Maria; Pradell i Cara, Lluís; Rius Casals, Juan Manuel; Rodríguez Fonollosa, Javier; Romeu Robert, Jordi; Coderch Collell, Marcel; Kerans, Mary Ellen; Law, Carolyn; García Hernández, Antonio; Gutiérrez Martos, David; Hernández Bonet, Antoni; Ferrer Bosch, Anna; Pérez Trufero, Javier; Torre Lara, Jordi de la; Torres Matabosch, Núria (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2010-02-11)
      Comunicació de congrés / Text en actes de congrés
      Accés obert
      El projecte es desenvolupa en el marc de la titulació oficial de màster MERIT del Departament de Teoria del Senyal i Comunicacions. El màster, orientat a la recerca i integrat dins del programa Erasmus Mundus, presenta ...

    • Diversity in mobile communications for blind detection of block-coded modulations 

      Vázquez Grau, Gregorio; Rey Micolau, Francesc; Lamarca Orozco, M. Meritxell; Rodríguez Fonollosa, Javier (Institute of Electrical and Electronics Engineers (IEEE), 1999)
      Text en actes de congrés
      Accés obert
      Spatial, temporal, and frequency diversity structures are analyzed to address the blind equalization problem in the presence of time-variant frequency selective channels. The aim of the paper is to present equalization ...

    • DMA tradeoff for the MIMO static half-duplex relay 

      García Ordoñez, Luis; Pérez Palomar, Daniel; Rodríguez Fonollosa, Javier (2011)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The diversity and multiplexing tradeoff (DMT) has been extensively applied in the literature to compare the high-SNR outage performance of relaying techniques and to propose new design guidelines. The problem with this ...

    • Downlink beamforming for cellular mobile communications 

      Goldberg, J; Rodríguez Fonollosa, Javier (IEEE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, INC., 1997)
      Text en actes de congrés
      Accés obert
      A new technique for downlink transmission beamformer design in cellular mobile communications systems using an antenna array at the base station is presented. The method is based on estimation of an underlying spatial ...

    • Downlink beamforming for spatially distributed sources in cellular mobile communications 

      Goldberg, Jason Matthew; Rodríguez Fonollosa, Javier (1998-03)
      Article
      Accés restringit per política de l'editorial
      This paper presents a new technique for downlink transmission beamformer design in cellular mobile communication systems using antenna arrays at the base station. The method is based on estimation of an underlying spatial ...

    • Downlink beamforming in cellular mobile communications 

      Rodríguez Fonollosa, Javier; Goldberg, J; Vázquez Grau, Gregorio (Institute of Electrical and Electronics Engineers (IEEE), 1997)
      Text en actes de congrés
      Accés obert
      A technique for downlink transmission beamformer design in cellular mobile communications systems using an antenna array at the base station is presented. The method is based on estimation of an underlying spatial distribution ...