Ara es mostren els items 124-143 de 177

    • PARSAR: A SAR processor implemented in a cluster of workstations 

      Martínez, A; Fraile, F; Mallorquí Franquet, Jordi Joan; Nogueira, L; Gabaldà, J; Broquetas Ibars, Antoni; González Colás, Antonio María (ESA Publications Division, 1997)
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      A parallel SAR processor is presented in this paper. The target configuration is a cluster of UNIX workstations, available in most user sites. This fact allows to obtain an increased computing performance without the need ...
    • PARSAR: Parallelisation of a chirp scaling algorithm SAR processor 

      Martínez, A; Fraile, F; Mallorquí Franquet, Jordi Joan; Nogueira, J; Gavalda, J; Broquetas Ibars, Antoni; González Colás, Antonio María (Ch. Lengauer, M. Grielb, S. Gorlatch. BERLIN, NEW YORK, Springer-Verlag Cop.1997, 1997)
      Text en actes de congrés
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      A parallel SAR processor is presented in this paper. The target configuration is a cluster of UNIX workstations, available in most user sites. This fact allows to obtain an increased computing performance without the need ...
    • Parsar: parallelisation of a chirp scaling algorithm sar processor 

      Martínez, Antonio; Fraile, Francisco; Mallorquí Franquet, Jordi Joan; Nogueira, Leonardo; Gabaldá, Jordi; Broquetas Ibars, Antoni; González Colás, Antonio María (1997-08)
      Article
      Accés restringit per política de l'editorial
      A parallel SAR processor is presented in this paper. The target configuration is a cluster of UNIX workstations, available in most user sites. This fact allows to obtain an increased computing performance without the need ...
    • Phase ambiguity resolution for orbit determination interferometry 

      Fernández Usón, Marc; Martin Fuster, Roger; Broquetas Ibars, Antoni (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Comunicació de congrés
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      This paper proposes a method to solve the absolute phase ambiguity introduced by an orbit determination interferometer system, suitable for GeoSAR missions. This method will be complemented with simulated results in order ...
    • Planar and cylindrical active microwave temperature imaging... 

      Rius Casals, Juan Manuel; Jofre Roca, Lluís; Broquetas Ibars, Antoni (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1992-12-02)
      Article
      Accés obert
      A comparative study at 2.45 GHz concerning both measurement and reconstruction parameters for planar and cylindrical configurations is presented. For the sake of comparison, a numerical model consisting of two nonconcentric ...
    • Planar and cylindrical active microwave temperature imaging: numerical simulations 

      Rius Casals, Juan Manuel; Pichot du Mezeray, Christian Yves Dominique; Jofre Roca, Lluís; Bolomey, Jean Charles; Joachimowicz, N; Broquetas Ibars, Antoni; Ferrando Bataller, Miquel (1992-12)
      Article
      Accés obert
      A comparative study at 2.45 GHz concerning both measurement and reconstruction parameters for planar and cylindrical configurations is presented. For the sake of comparison, a numerical model consisting of two nonconcentric ...
    • Planar and cylindrical active microwave temperature imaging: numerical simulations 

      Rius Casals, Juan Manuel; Pichot du Mezeray, Christian Yves Dominique; Jofre Roca, Lluís; Bolomey, J. C. (Jean-Charles); Joachimowicz, N.; Broquetas Ibars, Antoni; Ferrando Bataller, Miguel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1992-12-02)
      Article
      Accés obert
      A comparative study at 2.45 GHz concerning both measurement and reconstruction parameters for planar and cylindrical configurations is presented. For the sake of comparison, a numerical model consisting of two nonconcentric ...
    • Polarimetric radar interferometry for improved mine detection and surface clutter rejection 

      Sagués Piella, Lluís; López Márquez, Miguel Ángel; Fortuny, Joaquim; Fabregas Canovas, Francisco Javier; Broquetas Ibars, Antoni; Sieber, Alois (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-06-30)
      Article
      Accés obert
      A recently developed technique, polarimetric radar interferometry, is applied to tackle the problem of the detection of buried objects embedded in surface clutter. An experiment with a fully polarimetric radar in an anechoic ...
    • Polarimetric techniques for SAR contrast and resolution enhancement 

      López Martínez, Carlos; Fabregas Canovas, Francisco Javier; Broquetas Ibars, Antoni; Krogager, E (Institute of Electrical and Electronics Engineers (IEEE), 1999)
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    • Precise geometry simulation of interferometric SAR signal for air- and spaceborne sensors 

      Bara, M; Broquetas Ibars, Antoni; Closa Domínguez, Josep M. (IEEE Piscataway, 2000)
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      A complete interferometric synthetic aperture radar (SAR) simulator has been developed. It achieves precise results by using geodetic models to represent the Earth's shape, and considering SAR effects such as range migration, ...
    • Precise orbit observation techniques for geosynchronous synthetic aperture radar (GEOSAR) 

      Nicolás Álvarez, Jorge; Broquetas Ibars, Antoni; Aguasca Solé, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2019)
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      The orbit accuracy requirements for a Geosynchronous Synthetic Aperture Radar (GEOSAR) are studied. Compared to telecommunication GEO satellites' station keeping needs, focusing the GEOSAR synthetic aperture demands a more ...
    • Procesado de imágenes SAR (Radar de Apertura Sintética) aerotransportado con compensación de movimiento 

      Bara Iniesta, Marc Antoni; Javier, Cachón; Broquetas Ibars, Antoni; Carlos, Juan Crespo (Iberdrola Instituto Tecnológico, 1998)
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      An operational processor to obtain high resolution radar images of the Earth surface from an airborne platform is presented. The paper describes the problem, its geometry and the steps to obtain a reflectivity image from ...
    • Procesado interferométrico de datos SAR de sensores aerotransportados 

      Bara, M; Broquetas Ibars, Antoni (Universidade de Santiago de Compostela, Servizo de Publicaciións e Intercambio Científico, 1999)
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      SAR Interferometry is a useful tool which allows the generation of high-precision Digital Elevation Models of the Earth surface. The paper describes an operational scheme of an interferometric processor, applicable to ...
    • Processing microwave experimental data with the distorted Born iterative method of nonlinear inverse scattering 

      Mallorquí Franquet, Jordi Joan; Broquetas Ibars, Antoni; PICHOT DU MEZERAY, Christian; Bolomey, Jean Charles (Institute of Electrical and Electronics Engineers (IEEE), 1993)
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      The Born-iterative method (BIM) and the distorted-Born-iterative method (DBIM) have been proposed and verified as methods of solving the nonlinear inverse scattering problem for dielectric scatterers. The continuous-wave ...
    • Proposed satellite position determination systems and techniques for Geostationary Synthetic Aperture Radar 

      Martin Fuster, Roger; Fernández Usón, Marc; Casado Blanco, David; Broquetas Ibars, Antoni (2016)
      Article
      Accés obert
      This paper proposes two different calibration techniques for Geostationary Synthetic Aperture Radar (GEOSAR) missions requiring a high precision positioning, based on Active Radar Calibrators and Ground ...
    • Quantitative images of large biological bodies in microwave tomography by using numerical and real data 

      Mallorquí Franquet, Jordi Joan; Joachimowicz, N.; Broquetas Ibars, Antoni; Bolomey, J. C. (Jean-Charles) (IEE-INST ELEC ENG, 1996-11-01)
      Article
      Accés obert
      A new inverse microwave imaging algorithm is presented which has the ability to obtain quantitative dielectric maps of large biological bodies. By using a priori information, obtained with a first order algorithm, the final ...
    • El Radar : de dónde viene y hacia dónde va 

      Broquetas Ibars, Antoni (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1994)
      Article
      Accés obert
    • Radar biestàtic sincronitzat per Hitchhiking 

      Pous i Sabadí, Carles; Aguasca Solé, Alberto; Elias Fusté, Antoni; Broquetas Ibars, Antoni (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1993)
      Article
      Accés obert
    • Radiometric and spatial resolution constraints in millimeter-mave close-range passive screener systems 

      Nova, Enrique; Romeu Robert, Jordi; Torres Torres, Francisco; Pablos Hernández, Miriam; Riera, Jose Manuel; Broquetas Ibars, Antoni; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2013-04)
      Article
      Accés restringit per política de l'editorial
      This paper presents a comparative study of the radiometric sensitivity and spatial resolution of three near-field (NF) passive screener systems: real aperture, 1-D synthetic aperture (SA), and 2-D SA radiometers are compared. ...
    • Real-time lane classification and accident detection for safer micromobility 

      Morros Rubió, Josep Ramon; Broquetas Ibars, Antoni; Mateo i Remacha, Alex; Puig Rabat, Jordi; Davins Jovells, Manel (2023)
      Comunicació de congrés
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      The lack of knowledge of the micromobility regulations by e-scooter users is an important factor behind some of the accidents involving these vehicles. We present two modules that can increase the safety of the users and ...