Ara es mostren els items 21-40 de 199

  • 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
    Accés obert
    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. ...
  • Analysis of denoising algorithms for Polarimetric SAR data: the cases of the Bilateral and the Non Local Means filters 

    Martinez Del Hoyo Guri, Antonio (Universitat Politècnica de Catalunya, 2014-09-12)
    Projecte/Treball Final de Carrera
    Accés obert
    [ANGLÈS] The aim of this thesis is to do an in-depth analysis of state-of-the-art denoising methods for Polarimetric SAR data and to propose a new algorithm taking advantage on their strong points. The filters under analysis ...
  • Analysis of wind turbines blockage on doppler weather radar beams 

    Belmonte Molina, Aniceto; Fabregas Canovas, Francisco Javier (IEEE Press. Institute of Electrical and Electronics Engineers, 2010-07-01)
    Article
    Accés obert
  • Analysis, design and implementation of a compact interferometer for geostationary orbital tracking 

    Martin Fuster, Roger (Universitat Politècnica de Catalunya, 2016-05-11)
    Projecte/Treball Final de Carrera
    Accés restringit per decisió de l'autor
    Future geostationary radar systems will require the satellite orbit modeling with precisions in the order of the radar wavelength. Using interferometric techniques it is possible to determine satellite angular observables ...
  • Anàlisi SAR per missions de rescat utilitzant vehicles aeris no tripulats 

    Gallego Jiménez, Francisco Javier (Universitat Politècnica de Catalunya, 2016-10)
    Projecte/Treball Final de Carrera
    48 months embargo
  • Análisis de antenas de reflector mediante procesado gráfico 

    Vall-Llossera Ferran, Mercedes Magdalena; Salazar, C; Rius Casals, Juan Manuel; Cardama Aznar, Ángel (Universidad de Valladolid, 1995)
    Text en actes de congrés
    Accés obert
    The aim of this article is to show a new technique for calculating the Radiation Pattern of arbitrary geometry reflector antennas. We use the Graphical processing technique developed in this group for Radar Cross Section ...
  • Análisis de técnicas incoherentes para la detección de movimientos del terreno con imágenes SAR 

    Pastó Bota, Anna Rosa (Universitat Politècnica de Catalunya, 2012-04-23)
    Projecte/Treball Final de Carrera
    Accés restringit per decisió de l'autor
    [ANGLÈS] The SAR (Synthetic Aperture Radar) system delivers high resolution images of Earth's surface. This project aim is to detect and measure ground motions from two incoherent techniques, i.e. those techniques developed ...
  • Análisis y estudio del radar Ramet AD9 

    López Jiménez, José Manuel (Universitat Politècnica de Catalunya, 2009-07-08)
    Projecte/Treball Final de Carrera
    Accés obert
    El proyecto está basado en un estudio completo y detallado del radar RAMET modelo AD9. Las autoridades de tráfico catalanas, a través del Servei Català del Trànsit, están introduciendo en nuestras carreteras este tipo ...
  • Antenna Modeller for Synthetic Aperture Radar Applications. Electromagnetic and Radiometric Considerations 

    Calafell Rueda, Irene (Universitat Politècnica de Catalunya, 2011-02-17)
    Projecte Final de Màster Oficial
    Accés obert
    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)
    Treball Final de Grau
    Accés obert
  • Aplicación de los generadores de forma de onda arbitraria en la simulación de señales radar 

    Broquetas Ibars, Antoni; Aguasca Solé, Alberto; Elias Fusté, Antonio (1992)
    Text en actes de congrés
    Accés obert
  • Aplicación de sistemas PLL en la recuperación del sincronismo de portadora para un radar Biestatico coherente 

    Aguasca Solé, Alberto (1991)
    Text en actes de congrés
    Accés obert
    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
    Accés obert
    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)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    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 ...
  • Arbitrary wave synthesis using spectral transformations 

    Ferrando Bataller, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 1993)
    Text en actes de congrés
    Accés obert
    The different transformations among plane, cylindrical and spherical spectrum allow to tackle the arbitrary field synthesis from a set of known sources. Putting all the spectrums in the same coordinate axis we can obtain ...
  • Array antena SIW 24 GHz para radar de automóviles 

    Rosello Fabregat, Joaquim (Universitat Politècnica de Catalunya, 2015-05-21)
    Treball Final de Grau
    Accés restringit per decisió de l'autor
    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 ...
  • Ascending-descending orbit combination SAR interferometry assessment 

    Carrasco, D; Díaz, J; Broquetas Ibars, Antoni; Arbiol, Roman; CASTILLO, M; Palà, V (ESA Publications Division, 1997)
    Text en actes de congrés
    Accés obert
    Ascending-descending orbit combination for DEM generation is very promising technique which can be used to fill in ome gaps in the DEMs caused by the geometric deformations or SAR images. The benefits from the combination ...
  • 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)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    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 ...
  • Assessment of L-Band SAR polarimetry for soil and crop monitoring 

    Barber, Matías; López Martínez, Carlos; Grings, Francisco (VDE-Verlag, 2016)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    Near-future L-band fully polarimetric Synthetic Aperture Radar (SAR) missions will provide meaningful and timely information over agricultural lands. In this paper, we evaluate the potential of L-band SAR polarimetry for ...
  • Atmospheric phase screen retrieval from GEOSAR long term acquisition 

    Ruiz Rodon, Josep; Broquetas Ibars, Antoni; Monti Guarnieri, Andrea; Rocca, Fabio (2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    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 ...