Now showing items 21-40 of 152

  • Antenna Modeller for Synthetic Aperture Radar Applications. Electromagnetic and Radiometric Considerations 

    Calafell Rueda, Irene (Universitat Politècnica de Catalunya, 2011-02-17)
    Master thesis
    Open Access
    The objective of the present Master Thesis is designing an optimizer of the excitation coefficients of a phased array antenna.
  • Una aplicacio GeoWeb: Morella 

    Bellvís Milián, Marc (Universitat Politècnica de Catalunya, 2009-09-01)
    Bachelor thesis
    Open Access
  • Aplicación de sistemas PLL en la recuperación del sincronismo de portadora para un radar Biestatico coherente 

    Aguasca Solé, Alberto (1991)
    Conference report
    Open Access
    A bistatic radar, which allows to process the target velocity information, must synchronize the phase and the frequency of the transmitted carrier to demodulate coherently the radar echoes. The paper presents a PLL system ...
  • Aplicación del análisis fractal al estudio de las estructuras dinámicas de fluidos medioambientales 

    Platónov, Alexéi Konstantínovich; Grau Barceló, Joan; Redondo Apraiz, José Manuel (Fundación para el Fomento de la Ingeniería del Agua, 2008-09)
    Article
    Open Access
    La aparición de múltiples escalas, que interactúan entre si en diversos fenómenos físicos medioambientales, especialmente cuando el régimen fluido es turbulento, exige métodos de análisis nuevos. El análisis multi-fractal ...
  • Approach to velocity and acceleration measurement in the Bi-Directional SAR imaging mode 

    Mittermayer, Josef; Prats, Pau; Wollstadt, Steffen; Baumgartner, Stefan; López Dekker, Francisco J.; Broquetas Ibars, Antoni; Makhoul Varona, Eduardo; Krieger, Gerhard; Moreira, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Conference report
    Restricted access - publisher's policy
    This paper presents an initial analysis of the possibilities for velocity and acceleration m easurement with the Bi- Directional SAR imaging mode (BiDi). It comprises single satellite single path acquisitions as well ...
  • Array antena SIW 24 GHz para radar de automóviles 

    Rosello Fabregat, Joaquim (Universitat Politècnica de Catalunya, 2015-05-21)
    Bachelor thesis
    Restricted access - author's decision
    In this project a flat antenna array on Substrate Integrated Waveguide technology (SIW) has been designed, simulated and built to be used in automotive radar at 24 GHz. The software used in the simulation, configuration ...
  • Assesment of atmospheric phase screen impact on Geosynchronous SAR 

    Recchia, Andrea; Monti Guarnieri, Andrea; Broquetas Ibars, Antoni; Ruiz Rodon, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    The paper evaluates the effects of Atmospheric Phase Screen on focused Geosynchronous SAR data. We derive theoretical models for the resolution, the interferometric de-correlation and the induced clutter in presence of an ...
  • Atmospheric phase screen retrieval from GEOSAR long term acquisition 

    Ruiz Rodon, Josep; Broquetas Ibars, Antoni; Monti Guarnieri, Andrea; Rocca, Fabio (2012)
    Conference report
    Restricted access - publisher's policy
    In this paper, a GEOSAR mission with typical LEOSAR parameters but longer integration time to increase the received power is presented. Such systems can provide images of large areas with continuous monitoring. The revisit ...
  • Calibración polarimetrica de un campo compacto de medida RCS 

    Broquetas Ibars, Antoni; Jofre Roca, Lluís (1991)
    Conference report
    Open Access
    A polarimetric calibrarion procedure for a compact range RCS measurement system is presented. This merhod is based on a marhematical model which includes al! possible errors. Some RCS measurements and ISAR images are included.
  • CFAR data fusion center with inhomogeneous receivers 

    Elias Fusté, Antonio; Broquetas Ibars, Antoni (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1992-01-02)
    Article
    Open Access
    Detection systems with distributed sensors and data fusion are increasingly used by surveillance systems. A system formed by N inhomogeneous constant false alarm rate (CFAR) detectors (cell-averaging (CA) and ordered ...
  • Characterization of a radar for autonomous vehicle location systems 

    Flores Abad, Ismael (Universitat Politècnica de Catalunya, 2015-10-14)
    Bachelor thesis
    Restricted access - confidentiality agreement
  • Circular synthetic aperture radar (C-SAR) system for ground based applications 

    Broquetas Ibars, Antoni; Porrata-Dòria i Yagüe, Ramir de; Sagués Piella, Lluís; Fabregas Canovas, Francisco Javier; Jofre Roca, Lluís (IEE-INST ELEC ENG, 1997-05-01)
    Article
    Open Access
    The authors present an SAR system capable of obtaining radar images from measurements carried out with antennas that describe a circular trajectory centred outside the target region. The analytical formulation of the ...
  • Comparative analyses of multi-frequency PSI ground deformation measurements 

    Sabater Cifuentes, José Raúl (Universitat Politècnica de Catalunya, 2012-03-29)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    [ANGLÈS] In recent years many new developments have been made in the field of SAR image analysis. The diversity of available SAR imagery allows a wider range of applications to be covered in the domain of risk management ...
  • Comparison of topography- and aperture-dependent motion compensation algorithms for airborne SAR 

    Prats Iraola, Pau; Câmara de Macedo, Karlus A.; Reigber, Andreas; Scheiber, Rolf; Mallorquí Franquet, Jordi Joan (IEEE, 2007-07-31)
    Article
    Open Access
    This letter presents a comparison between three Fourier-based motion compensation (MoCo) algorithms for airborne synthetic aperture radar (SAR) systems. These algorithms circumvent the limitations of conventional MoCo, ...
  • Compresión de pulsos: Análisis de formas de onda no lineales 

    de los Reyes, Elías; Clavera, Jordi; Elias Fusté, Antonio (Universidad Politécnica de Madrid (UPM), 1988)
    Conference report
    Open Access
  • Compresión digital de señales chirp. Compresión en coma fija 

    de los Reyes, Elías; Casadevall, Laura; Elias Fusté, Antonio; Ferrando, Miguel (1987)
    Conference report
    Open Access
    It is presented the simulation of a fixed point digital matched filter, in order to estimate their perfomances.
  • Considerations about antenna pattern measurements of 2-D aperture synthesis radiometers 

    Camps Carmona, Adriano José; Skou, Neils; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria (IEEE, 2006-04-30)
    Article
    Open Access
    Accurate measurement of the antenna voltage patterns of large-aperture synthesis radiometers is critical in order to achieve good radiometric accuracy, and a very time consuming and expensive task. Measurement requirements ...
  • DA-GLRT burst detection and synchronization based on a chirp-like preamble 

    Rodríguez, E; Lamarca Orozco, M. Meritxell; López Salcedo, José Antonio; Rey Micolau, Francesc; Riba Sagarra, Jaume; Sala Álvarez, José; Vázquez Grau, Gregorio; Villares Piera, Nemesio J.; Jalón, A (2008)
    Conference report
    Restricted access - publisher's policy
    A specific preamble for the tasks of signal detection and synchronization in burst digital communications is presented. The preamble resembles a chirp signal used in RADAR applications. Its main benefit is that it allows ...
  • Desarrollo de una aplicación para informar sobre carreteras usando social networks 

    Álvarez Morales, Ferran (Universitat Politècnica de Catalunya, 2015-04-24)
    Bachelor thesis
    Open Access
    [CASTELLÀ] Desarrollo de una aplicación móvil que informa en tiempo real sobre la localización de radares. La información necesaria se obtiene mediante el análisis de las publicaciones de la red social Twitter.
  • Desenvolupament de codis d'anàlisi de la dispersió electromagnètica deguda a blancs RADAR molt petits 

    Crespí Font, Francisca (Universitat Politècnica de Catalunya, 2010-02-05)
    Bachelor thesis
    Open Access