Enviaments recents

  • Image restoration using HOS and the Radon transform 

    Sayrol Clols, Elisa; Nikias, C L; Gasull Llampallas, Antoni (IEEE IEEE PRESS, 1993)
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    The authors propose the use of higher-order statistics (HOS) to study the problem of image restoration. They consider images degraded by linear or zero phase blurring point spread functions (PSF) and additive Gaussian ...
  • Analytic performance evaluation of cumulant-based arma system identification methods 

    Rodríguez Fonollosa, José Adrián; Vidal Manzano, José (IEEE IEEE PRESS, 1993)
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    The authors perform an analytic study of some cumulant-based methods for estimating the AR parameters of ARMA processes. The analysis includes new AR identifiability results for pure AR process and the analytic performance ...
  • Self-similar current distribution on fractal Sierpinski antenna verified with infrared thermograms 

    González Arbesú, José María; Puente Baliarda, Carles; Romeu Robert, Jordi; Aguasca Solé, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 1999)
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    Experimental verification of the fractal Sierpinski antenna surface current distribution is presented. Measured data from an infrared camera agree with numerical data showing a self-similar behavior in the current density ...
  • Reduction of the model noise in non-linear reconstruction via an efficient calculation of the incident field: application to a 434 MHz Scanner 

    Geffrin, J M; Mallorquí Franquet, Jordi Joan; Joachimowicz, N; Redondo, R; Vall·Llossera, M; Vall-Llossera Ferran, Mercedes Magdalena; Franza, Joisel A; Bolomey, Jean Charles (Institute of Electrical and Electronics Engineers (IEEE), 1999)
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    Microwave tomography has been drastically boosted by the development of efficient reconstruction algorithms based on an iterative solution of the corresponding non-linear inverse problem. The accuracy of the electric field ...
  • Vectorial waveguide reflectometer for dielectric characterisation of materials under power microwaves 

    Mallorquí Franquet, Jordi Joan; Aguasca Solé, Alberto; Ribó Vedrilla, Serni (Institute of Electrical and Electronics Engineers (IEEE), 1999)
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    The temperature rise in a material modifies its physical properties, particularly its dielectric permittivity. In many applications involving relatively high levels of power the electrical behavior of the different materials ...
  • Application of the conjugate gradient method to a self-matching network for industrial microwave heating antennas 

    Mallorquí Franquet, Jordi Joan; Aguasca Solé, Alberto; Cardama Aznar, Ángel; Pages, R; Haro, J M (Institute of Electrical and Electronics Engineers (IEEE), 1999)
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    One of the main problems regarding the efficiency in a heating industrial system using high power microwaves is related with the uncontrolled changes on the load. These changes can be caused both by the different kinds of ...
  • near field to far field tranfsormation of bipolar measurements by equivalent magnetic current approach 

    Blanch Boris, Sebastián; Romeu Robert, Jordi (ieee ieee, 1996)
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    An equivalent magnetic current (EMC) approach has been proposed as an alternative method to the classical modal formulation for computing the far-field pattern of a radiating antenna from planar near-field measurements. ...
  • AIterative algorithm for microwave imaging using the cgm-fft and the pseudoinverse method 

    Mallorquí Franquet, Jordi Joan; Llorens, V (Institute of Electrical and Electronics Engineers (IEEE), 1994)
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    Within biomedical microwave tomography, a spatial iterative method for the reconstruction of the complex permittivity of inhomogeneous lossy dielectric objects with arbitrary shape from their scattered electric field is ...
  • The cgm and the fdtd for sar studies 

    Pous Andrés, Rafael; Mallorquí Franquet, Jordi Joan; Bayonas, F (Institute of Electrical and Electronics Engineers (IEEE), 1994)
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    In the study of electromagnetic radiation effects over dielectric bodies, effective numerical methods are needed. At present, there is a lack of tools for measuring these effects and due to the huge growth of microwave ...
  • Stereo Image Analysis using Connected Operators 

    Oliveras Vergés, Albert; Salembier Clairon, Philippe Jean; Garrido Ostermann, Luis (IEEE IEEE, 1997)
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    Connected operators are increasingly used in image processing due to their properties of simplifying the image with various criteria, without loosing contour's information. These properties are related to the connected ...

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