Ara es mostren els items 180-199 de 199

  • Simulador de sistemas radar 

    Elias Fusté, Antonio (1989)
    Text en actes de congrés
    Accés obert
    The complex configuration of a real radar receiver and the wide variety of environments and interference si tuations disuades i ts direct performance analysis. Simulation is a good way to make a useful performance study ...
  • Sistema cilíndrico de tomografía de microondas. Arquitectura de radiofrecuencia. Mejoras y resultados 

    de los Reyes, Elías; Broquetas Ibars, Antoni; Elias Fusté, Antonio; Ibáñez, Juan (1987)
    Text en actes de congrés
    Accés obert
    The E.M.C. of a prototype for cylindrical microwave tornography is analized, the initial design has been improved and first results are presented.
  • SPALINET: Red Española de lidares de aerosoles 

    Guerrero Ruiz, A.; Sicard, Michaël; Rocadenbosch Burillo, Francisco; Muñoz, C.; Tomás Martínez, Sergio; Comerón Tejero, Adolfo; Pujadas, Manuel; Molero, Francisco; Alados Arboledas, Lucas; Moreno, J. M.; Bolarín, Jose Miguel; Requena, Alberto; Córdoba Jabonero, Carmen; Gil, Marisa; Exposito, Francisco Javier; Díaz Cort, Josep; Pedrós, Roberto; Martínez Lozano, José Antonio (2008)
    Text en actes de congrés
    Accés restringit per política de l'editorial
  • Spectral iterative algorithm for RCS computation in electrically large or intermediate perfectly conducting cavities 

    Rius Casals, Juan Manuel; Lozano Solsona, Angel; Cardama Aznar, Ángel; Jofre Roca, Lluís (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1994-06-01)
    Article
    Accés obert
    A novel algorithm designed to compute efficiently and accurately the high-frequency electromagnetic scattering from open-ended waveguide cavities is presented. The cavity is converted into a stepped-waveguide model so that ...
  • Synthesis, construction, and validation of a fractal surface 

    Ruello, Giuseppe; Blanco Sánchez, Pablo; Iodice, Antonio; Mallorquí Franquet, Jordi Joan; Riccio, Daniele; Broquetas Ibars, Antoni; Franceschetti, Girogio (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-06-30)
    Article
    Accés obert
    Fractal geometry provides reliable models to describe geometrical properties of natural surfaces. Therefore, their use in the electromagnetic scattering methods deserves careful research. In order to have complete insight ...
  • Target spinor calibration (TSC) for polarimetric radar cross-section measurements 

    Fabregas Canovas, Francisco Javier; Romeu Robert, Jordi; Broquetas Ibars, Antoni; Jofre Roca, Lluís (IEE-INST ELEC ENG, 1995-09-01)
    Article
    Accés obert
    A new polarimetric calibration method is proposed based on scattering matrix decomposition, via Pauli matrices. This scheme operates with the Pauli target vectors instead of the scattering matrix. The base elements of the ...
  • Temporal PolSAR image series exploitation with binary partition trees 

    Alonso González, Alberto; López Martínez, Carlos; Salembier Clairon, Philippe Jean (IEEE, 2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this paper, the processing of temporal PolSAR image series is addressed through a region-based and multi-scale data representation, the Binary Partition Tree (BPT). This structure contains useful information related ...
  • Técnicas de desenrollado robusto y geocodificación para la obtención de modelos digitales de elevación (DEM) 

    Broquetas Ibars, Antoni (Unión Científica Internacional de Radio (URSI), 2000)
    Text en actes de congrés
    Accés obert
    In this paper we present improved techniques of unwrapping and geocoding to obtain Digital Elevation Models (DEM). These techniques have been developed in the Teoria del Senyal i Comunicacions (TSC) department. Some results ...
  • Técnicas de detección adaptativa con tasa de falsa alarma constante 

    Elias Fusté, Antonio; Puga Antequera, Jordi (1989)
    Article
    Accés obert
    Radar detection procedures involve the comparison of the received signal amplitud to a threshold. In order to obtain a constant false alarm rate (CFAR), an adaptative threshold must be applied reflecting the local clutter ...
  • The polarimetric ratio filter applied to polinsar images 

    Foucher, Samuel; López Martínez, Carlos; Charbonneau, François (IEEE, 2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    We are proposing recursive filter for the filtering of Single Look Complex PolInSAR data. This recursive filter allows the iterative refinement of a coarse multilook estimate by reintroducing details that have been ...
  • The processing of hexagonally sampled signals with standard rectangular techniques: application to 2D large aperture synthesis interferometric radiometers 

    Camps Carmona, Adriano José; Bará Temes, Francisco Javier; Corbella Sanahuja, Ignasi; Torres Torres, Francisco (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1997-01-31)
    Article
    Accés obert
    In Earth observation programs there is a need of passive low frequency (L-band) measurements to monitor soil moisture and ocean salinity with high spatial resolution 10-20 km, a radiometric resolution of 1 K and a revisit ...
  • The use of the L2-norm for the analysis of texture on PolSAR data 

    Deng, Xinping; López Martínez, Carlos (VDE-Verlag, 2016)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    The use of the l2-norms of the scattering vectors is suggested to texture analysis of PolSAR data, with the benefits that neither we need to analyze the polarimetric channels separately, nor we need to filter the data to ...
  • Topography dependent motion compensation for repeat-pass interferometric SAR systems 

    Prats Iraola, Pau; Reigber, Andreas; Mallorquí Franquet, Jordi Joan (IEEE, 2005-04-30)
    Article
    Accés obert
    This letter presents a new motion compensation algorithm to process airborne interferometric repeat-pass synthetic aperture radar (SAR) data. It accommodates topography variations during SAR data processing, using an ...
  • Track compensation and calibration of continuous monitoring GEOSAR missions 

    Broquetas Ibars, Antoni; Casado, David; Martín, Roger; Fernández Usón, Marc; Monti Guarnieri, Andrea; Leanza, Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    The paper analyzes the problem of achieving a coherent operation in Geostationary SAR (GEOSAR) missions intended for continuous monitoring of land surfaces. In contrast to LEOSAR missions, GEOSAR uses very long SAR integration ...
  • Transición guía de onda - línea microstrip en banda W 

    Mata Roca, Salvador (Universitat Politècnica de Catalunya, 2011-11-17)
    Projecte/Treball Final de Carrera
    Accés obert
    English: Design and implement a transition back-to-back W-band. Designing a transition back-to-back for unencapsulated active devices.
  • UWB for medical applications 

    Rodríguez Serra, Guillermo (Universitat Politècnica de Catalunya, 2015-10)
    Treball Final de Grau
    Accés obert
    The respiratory frequency monitoring is an important indicator to the medical field. Also, the need of sensor system solutions for home monitoring is growing as the life expectancy of the world population is increasing. ...
  • UWB Radar for health monitoring applications 

    Trullenque Ortiz, Martín (Universitat Politècnica de Catalunya, 2016-10)
    Treball Final de Grau
    Accés obert
    The respiratory frequency is an important indicator in the medicine field that becomes more relevant in patients that must be monitored. Due to the global increase in the live expectancy, this number of patients also ...
  • Validation of a sea surface model for simulations of dynamic maritime SAR images 

    Yam Ontiveros, Luis Eduardo; Mallorquí Franquet, Jordi Joan; Rius Casals, Juan Manuel (IEEE, 2012)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    Controllable maritime scenarios have become a central issue in the research of new applications of SAR imaging to vessel monitoring systems. Numerical tools such as GRECOSAR, a SAR simulator of complex targets, are able ...
  • Variable local weight filtering for PolSAR data speckle noise reduction 

    Alonso González, Alberto; López Martínez, Carlos; Salembier Clairon, Philippe Jean (IEEE, 2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper presents a Polarimetric SAR data speckle filtering technique, based on a combined filtering in the spatial and polarimetric domains. It is based on a bilateral filtering employing distance measures over these ...
  • Wavelet Transform-Based Interferometric SAR Coherence Estimator 

    López Martínez, Carlos; Fabregas Canovas, Francisco Javier; Pottier, Eric (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-12-31)
    Article
    Accés obert
    A novel method to estimate interferometric coherence in synthetic aperture radar interferometry is proposed. It is demonstrated that this approach is not affected by the terrain topography, contrary to multilook techniques. ...