Now showing items 1-20 of 40

    • A contactless capacitive angular-position sensor 

      Gasulla Forner, Manuel; Li, Xiujun; Meijer, Gerard C. M.; Van der Ham, Lucas; Spronck, Jo W. (Institute of Electrical and Electronics Engineers, 2003-10)
      Article
      Open Access
      This paper presents an absolute capacitive angular-position sensor with a contactless rotor. The sensor is mainly composed of three parts: the capacitive sensing element, a signal processor, and a microcontroller. The ...
    • A review of higher order ionospheric refraction effects on dual frequency GPS 

      Petrie, Elisabeth J.; Hernández Pajares, Manuel; Spalla, Paolo; Moore, Philip; King, Matt A. (2010-11-26)
      Article
      Restricted access - publisher's policy
      Abstract Higher order ionospheric effects are increasingly relevant as precision requirements on GPS data and products increase. The refractive index of the ionosphere is affected by its electron content and the magnetic ...
    • Average performance analysis of circular and hyperbolic geolocation 

      Urruela Planas, Andreu; Sala i Álvarez, Josep; Riba Sagarra, Jaume (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-01-31)
      Article
      Open Access
      A comparative performance analysis of four geolocation methods in terms of their theoretical root mean square positioning errors is provided. Comparison is established in two different ways: strict and average. In the ...
    • Behavioural modelling of DLLs for fast simulation and optimisation of jitter and power consumption 

      Barajas Ojeda, Enrique; Mateo Peña, Diego; González Jiménez, José Luis (IEEE Computer Society Publications, 2010)
      Conference report
      Open Access
      This paper presents a behavioural model for fast DLL simulations. The behavioural model includes a modelling of the various noise sources in the DLL that produce output jitter. The model is used to obtain the dependence ...
    • 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
      Open Access
      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 ...
    • 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
      Open Access
      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 ...
    • CFAR data fusion center with inhomogeneous receivers 

      Elias Fusté, Antoni; Broquetas Ibars, Antoni (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1992-01-02)
      Article
      Open Access
      Detection systems with distributed sensors and data fusion are increasingly used by surveillance systems. A system formed by N inhomogeneous constant false alarm rate (CFAR) detectors (cell-averaging (CA) and ordered ...
    • Classification of acoustic events using SVM-based clustering schemes 

      Temko, Andrey A.; Nadeu Camprubí, Climent (2006)
      Article
      Open Access
      Acoustic events produced in controlled environments may carry information useful for perceptually aware interfaces. In this paper we focus on the problem of classifying 16 types of meeting-room acoustic events. First of ...
    • Conditional maximum likelihood timing recovery: estimators and bounds 

      Riba Sagarra, Jaume; Sala i Álvarez, Josep; Vázquez Grau, Gregorio (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-04-30)
      Article
      Open Access
      This paper is concerned with the derivation of new estimators and performance bounds for the problem of timing estimation of (linearly) digitally modulated signals. The conditional maximum likelihood (CML) method is adopted, ...
    • Consensus for distributed EM-based clustering in WSNs 

      Silva Pereira, Silvana; Barbarossa, Sergio; Pagès Zamora, Alba Maria (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
      Conference lecture
      Open Access
      A distributed EM algorithm with consensus is proposed for density estimation and clustering using WSNs in the presence of mixtures of Gaussians. The EM algorithm is a general framework for maximum likelihood estimation in ...
    • Enhanced MDIR receiver for space-time dispersive channels 

      Vidal Manzano, José; Cabrera-Bean, Margarita; Agustín de Dios, Adrián; Lagunas Hernandez, Miguel A. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-01-31)
      Article
      Open Access
      A particular property of the matched desired impulse response receiver is introduced in this paper, namely, the fact that full exploitation of the diversity is obtained with multiple beamformers when the channel is ...
    • Estudio para la implementación de un banco de filtros-limitadores superconductor 

      Aires Casas, Francisco Manuel (Universitat Politècnica de Catalunya, 2010-03-05)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
    • Fuzzy integral based information fusion for classification of highly confusable non-speech sounds 

      Temko, Andrey A.; Macho Ciena, Dusan; Nadeu Camprubí, Climent (2008)
      Article
      Open Access
      Acoustic event classification may help to describe acoustic scenes and contribute to improve the robustness of speech technologies. In this work, fusion of different information sources with the fuzzy integral (FI), and ...
    • Harmonic balance algorithm to model nonlinear effects in HTS filters subject to CDMA signals 

      Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; O'Callaghan Castellà, Juan Manuel (Institute of Electrical and Electronics Engineers, 2003-06)
      Conference report
      Open Access
      We discuss an harmonic balance algorithm to analyze High Temperature Superconducting (HTS) circuits subject to wideband signals, such as the ones used in CDMA wireless systems. Undersampling is used to discretize and ...
    • Implementación de un modelo de canal inalámbrico para redes 802.11 bajo el simulador ns-2 

      Sánchez Lorente, Olga (Universitat Politècnica de Catalunya, 2005-09)
      Master thesis (pre-Bologna period)
      Open Access
      Las redes inalámbricas se presentan como una alternativa y a la vez como un complemento de las redes cableadas tradicionales. Para estudiar, comprender y mejorar el funcionamiento de las redes inalámbricas se utilizan ...
    • Implementación de un procesador digital de efectos mediante DSP e interfaz gráfica sobre plataforma W2000 y XP. 

      Grijota Delgado, José María (Universitat Politècnica de Catalunya, 2008-01-02)
      Master thesis (pre-Bologna period)
      Open Access
      El objetivo de nuestro proyecto será el de conseguir implementar mediante herramientas de programación de alto nivel un sistema que sea capaz de comunicar el interfaz generado por una aplicación programada en Visual C++ ...
    • Impulse response recovery of linear systems through weighted cumulant slice 

      Vidal Manzano, José; Rodríguez Fonollosa, José Adrián (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1996-10-01)
      Article
      Open Access
      Identifiability of the so-called ω-slice algorithm is proven for ARMA linear systems. Although proofs were developed in the past for the simpler cases of MA and AR models, they were not extendible to general exponential ...
    • Mesurador del tempo i de la mètrica musical 

      Folch, Marc (Universitat Politècnica de Catalunya, 2008)
      Master thesis (pre-Bologna period)
      Open Access
    • Methodologies of video quality assessment 

      Graells Moles, Joan Enric (Universitat Politècnica de Catalunya, 2008-06-11)
      Master thesis (pre-Bologna period)
      Open Access
    • ML estimator and hybrid beamformer for multipath and interference mitigation in GNSS receivers 

      Seco Granados, Gonzalo; Fernández Rubio, Juan Antonio; Fernández Prades, Carlos (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-05-31)
      Article
      Open Access
      This paper addresses the estimation of the code-phase(pseudorange) and the carrier-phase of the direct signal received from a direct-sequence spread-spectrum satellite transmitter. The signal is received by an antenna ...