Now showing items 21-40 of 1050

  • Actividades en procesado de la imagen del Grupo de Procesado de Señal 

    Marqués Acosta, Fernando; Gasull Llampallas, Antoni; Torres Urgell, Lluís (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1993)
    Article
    Open Access
  • Actividades en tratamiento de voz del Grupo de Procesado de Señal 

    Hernando Pericás, Francisco Javier (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1993)
    Article
    Open Access
  • Activitats extra-acadèmiques : carta oberta als pobladors del Campus 

    Elias Fusté, Antoni (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1993)
    Article
    Open Access
  • Actualidad espacial 

    Armengou, Ester (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1999)
    Article
    Open Access
  • 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 ...
  • Adaptive us-mrac for disturbance cancellation 

    Bertran Albertí, Eduardo; Montoro López, Gabriel (Institution of Electrical Engineers, 1995-01)
    Article
    Open Access
    A variable structure, model reference adaptive control (VS-MRAC) devoted to cancel interferences without the requirement of an auxiliary input is proposed. This method is an improved alternative to the strategies recently ...
  • Adiabatic shaping of quadratic solitons 

    Torner Sabata, Lluís; Clausen, C B; Fejer, M M (1998-06)
    Article
    Restricted access - publisher's policy
    We show the principle of operation of a setup to adiabatically shape solitons in quadratic nonlinear media to different beam profiles and widths or different fractions of energy carried by the second-harmonic wave. The ...
  • ¿Adiós al hardware? 

    Berenguer Sau, Jordi (Servei d'Informació, Imatge i Publicacions de la UPC, 2000, 2000)
    Conference lecture
    Open Access
  • A direct-sequence spread-spectrum super-regenerative receiver 

    Moncunill Geniz, Francesc Xavier; Mas Casals, Orestes Miquel; Palà Schönwälder, Pere (Institute of Electrical and Electronics Engineers (IEEE), 2000)
    Conference lecture
    Open Access
    Current applications of the super-regenerative receiver use narrowband modulations. In this paper a new architecture that allows incoherent detection of spread-spectrum signals is presented. A pseudorandom code generator ...
  • A discrete-time approach to the steady-state and stability analysis of distributed nonlinear autonomous circuits 

    Bonet Dalmau, Jordi; Palà Schönwälder, Pere; Miró Sans, Joan Maria (Institute of Electrical and Electronics Engineers (IEEE), 1998)
    Conference report
    Open Access
    We present a direct method for the steady-state and stability analysis of autonomous circuits with transmission lines and generic nonlinear elements. With the discretization of the equations that describe the circuit in ...
  • A discrete-time approach to the steady-state and stability analysis of distributed nonlinear autonomous circuits 

    Bonet Dalmau, Jordi; Palà Schönwälder, Pere (2000-02)
    Article
    Open Access
    We present a direct method for the steady-state and stability analysis of autonomous circuits with transmission lines and generic non- linear elements. With the discretization of the equations that describe the circuit ...
  • A discrete-time equivalent system approach to the periodic response of nonlinear autonomous circuits 

    Palà Schönwälder, Pere; Miró Sans, Joan Maria (1994)
    Conference report
    Open Access
    The problem of computing the steady state response of nonlinear autonomous circuits is solved making use of a discrete-time equivalent system approach. With the application of an s-plane to z-plane mapping, the circuit ...
  • ADSL : acceso indirecto al bucle de abonado 

    Lago Santin, Javier (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1999)
    Article
    Open Access