Now showing items 1-20 of 725

  • 62: Una herramienta interactiva para el estudio del tratamiento de la señal 

    Mariño Acebal, José Bernardo; Vallverdú Bayés, Sisco (Universidad de las Palmas de Gran Canaria, 1994)
    Conference report
    Open Access
  • A billingual texto-to-speech system in spanish and catalan 

    Bonafonte Cávez, Antonio; Esquerra Llucià, Ignasi; Febrer Godayol, Albert; Vallverdú Bayés, Sisco (Editors: G. Kokkinakis, N. Fakotakis, E. Dermatas; Editorial: WCL, University of Patras, Grece, 1997)
    Conference report
    Open Access
    This paper summarises the text-to-speech system that has been developed during the last years in the Speech Group of the Universitat Politccnica de Catalunya (UPC). The paper emphasises the parts of the system which are ...
  • A broadcast synthesized fm modulator with a radio data system encoder 

    Berenguer Sau, Jordi; Villanueva-Fernández, A. (1996-06)
    Article
    Open Access
    The design and development of a broadcast FM modulator with a RDS (radio data system) encoder is presented. The system is fully coherent with the modulated RF frequency synthesized in the 875-108 MHz frequency band with ...
  • A channel characterization technique for HF communications 

    Delgado Penin, José Antonio (1985)
    Conference report
    Open Access
    A wideband channel sounder to characterize the HF radio channel is described. Based on a pseudorandom sequence technique it allows the measurement of the complex impulsional response of the channel with time and frequency ...
  • A combined polling and ISMA-DS/CDMA protocol to provide QoS in packet mobile communications systems 

    Pérez Romero, Jordi; Agustí Comes, Ramon; Sallent Roig, José Oriol (Institute of Electrical and Electronics Engineers (IEEE), 2000)
    Conference report
    Open Access
    This paper presents a new mechanism that combines the flexibility of an access protocol such as ISMA-DS/CDMA with the ability of a polling mechanism to provide a specific bound for the access delay. This protocol is proposed ...
  • A comparison of several recent methods of fundamental frequency and voicing decision estimation 

    Rodríguez Fonollosa, José Adrián (H. TIMOTHY BRUMMELL, WILLIAM IDSARDI CITATION DELAWARE, NEW CASTLE, DELAWARE, 1996)
    Conference report
    Open Access
    The authors are interested in the comparison of several kinds of methods for fundamental frequency estimation and GCI (glottal closure instant) detection. These methods operate in various domains (time-, frequency- or joint ...
  • A contour matching approach for accurate NOAA-AVHRR image navigation 

    Eugenio, F; Marqués Acosta, Fernando; Suarez, E; Rovaris, E (Eurasip, 2000)
    Conference report
    Open Access
    Although different methods for NOAA AVHRR image navigation have already been established, the multitemporal and multi-satellite character of most studies requires automatic and accurate methods for navigation of satellite ...
  • A contribution to video coding using layers 

    Torres Urgell, Lluís; Lecha, M (1998)
    Conference report
    Open Access
    Layered representations of video sequences, originally introduced in [1], are important in several applications. Specifically, they are very appropriate for object tracking, object manipulation, content-based scalability ...
  • A cost function for the equalization of constant amplitude signals based on statistical reference 

    Sala Álvarez, José (1996)
    Conference report
    Open Access
    The equalization of constant amplitude signals is considered in the scope of this paper. A criterion based on the probability density function (pdf) of the signal of interest is proposed. The objective is to derive a ...
  • Active control of vibrant actuators with adaptive adjustment of the reference 

    Bertran Albertí, Eduardo; Montoro López, Gabriel (Fuertes, J.M. (ed.) IEEE, 1999)
    Conference report
    Open Access
    An improved adaptive filter for eliminating periodic vibrations of unknown frequency in rotary machinery is presented. The proposed canceller is based on a usual bank of digital adaptive notch filters, each filter tuned ...
  • Active zone self-similarity of fractal sierpinski antenna verified using infra-red thermograms 

    González, J.M.; Navarro Bernal, Manuel; Puente Baliarda, Carles; Romeu Robert, Jordi; Aguasca Solé, Alberto (Institution of Electrical Engineers, 1999-08)
    Article
    Open Access
    The surface current distribution of a Sierpinski fractal antenna shows a self-similar behaviour determined by the self-similar properties of its geometry. The application of infra-red thermography to electromagnetic near ...
  • Actividades del grupo EEF en el contexto de la red europea TMR "Polarimetría radar: Teoría y aplicaciones" 

    Fabregas Canovas, Francisco Javier; López Martínez, Carlos; Broquetas Ibars, Antoni (2000)
    Conference report
    Open Access
    The activity of the EEF group in the TMR European Project Radar Polarimetry: Theory and Applications will be presented in this paper. We have developed new polarimetric-interferometric retrieval algorithms and enhancement ...
  • Adaptative supression on narrow-band vibrations 

    Bertran Albertí, Eduardo; Montoro López, Gabriel (1998)
    Conference report
    Open Access
    The aim of the paper is to develop a theoretical analysis and implementation of an active control canceller devoted to eliminate narrow-band vibrations in rotary machines. The proposed system uses a bank of digital adaptive ...
  • Adaptive algorithms for improving the throughput in an indoor mobile s-aloha ds-cdma system 

    Sallent Roig, José Oriol; Agustí Comes, Ramon (DR. F-N PAVLIDOU IEEE, 1996)
    Conference report
    Open Access
    This paper presents a novel Adaptive DSCDMA Slotted-ALOHA packet random access scheme with transmitter-based spreading codes for mobiles. It is aimed at improving the throughput and message delay delivery when traffic ...
  • Adaptive Beamforming for High Bit Rate Services in the FDD Mode of UTRA 

    Mestre Pons, Francesc X.; Nájar Martón, Montserrat; Antón Haro, Carles; Rodríguez Fonollosa, Javier (Institute of Electrical and Electronics Engineers (IEEE), 1999)
    Conference report
    Open Access
    Most time-reference beamforming algorithms suffer from severe beampattern distortion effects when applied to high bit rate services in WCDMA, causing serious performance degradation in terms of output BER, especially at ...
  • Adaptive blind equalization using weighted cumulant slices 

    Vidal Manzano, José; Rodríguez Fonollosa, José Adrián (Institute of Electrical and Electronics Engineers (IEEE), 1994)
    Conference report
    Open Access
    Many linear methods have been proposed in the literature to blindly estimate the ARMA parameters of a time series using HOS. Nevertheless, they are mainly off-line and not much has been done in the adaptive case. The method ...
  • Adaptive blind system identification using weighted cumulant slices 

    Vidal Manzano, José; Rodríguez Fonollosa, José Adrián (1996-03)
    Article
    Restricted access - publisher's policy
    Many linear methods have been proposed in the literature to blindly estimate the ARMA parameters of a time series using HOS. Nevertheless, they are mainly off-line and not much has been done in the adaptive case. The method ...
  • Adaptive filter solution for processing lidar returns: optical parameter estimation 

    Rocadenbosch Burillo, Francisco; Vázquez Grau, Gregorio; Comerón Tejero, Adolfo (1998-10)
    Article
    Restricted access - publisher's policy
    Joint estimation of extinction and backscatter simulated profiles from elastic-backscatter lidar return signals is tackled by means of an extended Kalman filter (EKF). First, we introduced the issue from a theoretical point ...
  • Adaptive s-aloha cdma as an alternative way of integrating services in mobile environments 

    Sallent Roig, José Oriol; Agustí Comes, Ramon (2000-05)
    Article
    Open Access
    Code-division multiple-access (CDMA) schemes appear to be very promising access techniques for coping with the requirements of third-generation mobile systems, mainly because of their flexibility. This paper proposes an ...
  • Adaptive schemes for packet data in a ds-cdma environment 

    Sallent Roig, José Oriol; Agustí Comes, Ramon (IEEE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, INC., 1997)
    Conference report
    Open Access
    This paper presents a novel adaptive DS-CDMA slotted-ALOHA packet random access scheme for improving the throughput of the conventional DS-CDMA slotted-ALOHA system. For this purpose a mobile-assisted algorithm is envisaged ...