Now showing items 1-6 of 6

  • Analysis and reduction of the distortions induced by time-domain filtering techniques in network analyzers 

    Porrata-Dòria i Yagüe, Ramir de; Broquetas Ibars, Antoni; Martínez, Luís Fernando (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1998-08-31)
    Article
    Open Access
    The removal of isolation errors plays an essential role in the calibration process of radar scattering measurements. One of the most common techniques used for that purpose is time-domain filtering, also known as gating. ...
  • Auditory and nociceptive stimuli responses in the electro–encephalogram : a non-linear measures and time-frequency representation based analysis 

    Melia, Umberto Sergio Pio; Vallverdú Ferrer, Montserrat; Clarià Sancho, Francesc; Valls-Sole, Josep; Caminal Magrans, Pere (2014)
    Article
    Restricted access - publisher's policy
    Introduction: This article is part of the Focus Theme of Methods of Information in Medicine on “Biosignal Interpretation: Advanced Methods for Neural Signals and Images“. Objectives: An efficient way to investigate the ...
  • Automatic vessel monitoring with single and multidimensional SAR images in the wavelet domain 

    Tello Alonso, Mª Victoria; López Martínez, Carlos; Mallorquí Franquet, Jordi Joan (ELSEVIER SCIENCE BV, 2006-12-31)
    Article
    Open Access
    Spaceborne Synthetic Aperture Radar (SAR) techniques constitute an extremely promising alternative compared to traditional surveillance methods thanks to the all-weather and day-and-night capabilities of Radar linked with ...
  • EMI model of an AC/AC power converter 

    Espina Masramon, Jorge; Balcells Sendra, Josep; Arias Pujol, Antoni; Ortega García, Carlos; Berbel Artal, Néstor (2010)
    Conference report
    Open Access
    This paper deals with the validation of an EMI model to predict electromagnetic interferences (EMI) produced by power converters. A direct AC to AC matrix converter (MC) has been selected as experimental setup for the ...
  • Positive time-frequency distributions based on joint marginal constraints 

    Rodríguez Fonollosa, Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1996-08-01)
    Article
    Open Access
    This correspondence studies the formulation of members of the Cohen-Posch class of positive time-frequency energy distributions. Minimization of cross-entropy measures with respect to different priors and the case of ...
  • Wigner higher-order spectra: definition, properties, computation and application to transient signal analysis 

    Rodríguez Fonollosa, Javier; Nikias, Chrysostomos L. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1993-01-31)
    Article
    Open Access
    The Wigner higher order moment spectra (WHOS) are defined as extensions of the Wigner-Ville distribution (WD) to higher order moment spectra domains. A general class of time-frequency higher order moment spectra is also ...