Ara es mostren els items 229-248 de 321

    • Object detection with radar : present and future automotive technology 

      Díaz Martínez, Daniel (Universitat Politècnica de Catalunya, 2022-07-20)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   Hochschule für Technik und Wirtschaft Dresden
      Radar-based object detection in cars is an integral part of autonomous driving systems. Radar sensors benefit from their excellent robustness in adverse weather conditions such as snow, fog or heavy rain. Although machine ...
    • Obtención de imágenes ISAR de blancos móviles 

      Puente Baliarda, Carles; Broquetas Ibars, Antoni; Jofre Roca, Lluís (1992)
      Text en actes de congrés
      Accés obert
      A new method for motion compensation has been developed for radar imaging of moving targets (ISAR). Phase shifts (due to target motion) among adjacent pulses from a STEPPED FREQUENCY signal, are removed with a parabolic ...
    • Obtención de mapas de detección en escenarios marítimos mediante simulación paramétrica en sistemas SAR-MTI 

      Bertomeu Rojas, Xavier (Universitat Politècnica de Catalunya, 2014-04-28)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] This project is a small part of a larger project called SIMTISYS. The purpose of SIMTISYS is to simulate the behavior of a synthetic aperture radar with moving target indication (MTI) capabilities in maritime ...
    • On the amount of information content in microwave radiometry for wet delay correction 

      Gual de Torrellas, José María; Camps Carmona, Adriano José (Aalto University, 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The scope of this work is the determination of the set of optimum frequencies to be used in the companion microwave radiometers in future synthetic aperture radar altimeters, to provide higher spatial resolution of the ...
    • On the use of the l(2)-norm for texture analysis of polarimetric SAR data 

      Deng, xinping; López Martínez, Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2016-11-01)
      Article
      Accés obert
      In this paper, the use of the l2-norm, or Span, of the scattering vectors is suggested for texture analysis of polarimetric synthetic aperture radar (SAR) data, with the benefits that we need neither an analysis of the ...
    • On-board phase and modulus calibration of large aperture synthesis radiometers: study applied to miras. 

      Torres Torres, Francisco; Camps Carmona, Adriano José; Bará Temes, Francisco Javier; Corbella Sanahuja, Ignasi; Ferrero Pintor, Roberto (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1996-07-01)
      Article
      Accés obert
      On-board calibration of bidimensional aperture synthesis radiometers with a large number of antennas by the standard correlated noise injection method is technologically very critical because of the stringent requirements ...
    • Optical Doppler shift with structured light 

      Belmonte Molina, Aniceto; Pérez Torres, Juan (2011-11-15)
      Article
      Accés obert
      When a light beam with a transverse spatially varying phase is considered for optical remote sensing, in addition to the usual longitudinal Doppler frequency shift of the returned signal induced by the motion of the scatter ...
    • Optimización de detectores no paramétricos aplicados a radar 

      Mariño Acebal, José Bernardo; Figueiras Vidal, Aníbal R.; Sanz González, José Luis (1983)
      Text en actes de congrés
      Accés obert
      En esta comunicación se introduce un nuevo esquema de detector no paramétrico para aplicación Radar y se discuten brevemente sus prestaciones. En el 1er apartado se justifica la aparición de los detectores no paramétricos ...
    • Optimización de un Centro de Fusión CFAR para Sistemas Distribuidos RADAR 

      Ortega Villasclaras, Pablo Rafael; Elias Fusté, Antoni (1991)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Distributed detection theory is widely used in surveillance systems that recquire a large area of coverage and a large number of targets under consideration. In this paper an optimization algorithm for distributed systems ...
    • 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)
      Text en actes de congrés
      Accés obert
      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 ...
    • Performance assessment of a homodyne laser radar for surface displacement monitoring 

      Rodríguez Gómez, Alejandro Antonio; Comerón Tejero, Adolfo; Mesalles Nalda, Eloy (Spie-Int Society Optical Engineering, 2001-12-31)
      Article
      Accés obert
    • Phase codification optimization of a pulse radar 

      Martinez Torrebadella, Alexis (Universitat Politècnica de Catalunya, 2018-10-30)
      Treball Final de Grau
      Accés obert
      In this project, a study about Barker codes and poly-phase codes is done, with the goal to create a search engine, to find a poly-phase sequence with given parameters using Matlab. First of all, the basic concepts to ...
    • Phase quality optimization in Orbital Differential SAR Interferometry with fully polarimetric data 

      Monells Miralles, Daniel; Iglesias González, Rubén; Mallorquí Franquet, Jordi Joan; Fabregas Canovas, Francisco Javier; López Martínez, Carlos (IEEE, 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Orbital Differential SAR Interferometry (DInSAR) is a well-known technique to retrieve terrain deformation phenomena from wide areas with high resolution. Historically its application has been limited to single polarization ...
    • Phased-Array Antenna Calibration and Cross-polarization improvement of an X-band Weather Radar 

      Masalias Huguet, Gerard (Universitat Politècnica de Catalunya, 2015-10)
      Projecte/Treball Final de Carrera
      Accés obert
      Realitzat a/amb:   University of Massachusetts at Amherst
      Dual-polarized phased-array radars used for weather retrieval purposes is an emerging tendency over the last few years. The dual-polarization technology provides an expanded range of weather products and the reliability ...
    • Planetary boundary layer height variability over Athens, Greece, based on the synergy of Raman lidar and radiosonde data: application of the Kalman filter and other techniques (2011-2016) 

      Alexiou, Dimitrios; Kokkalis, Panagiotis; Papayannis, Alexandros; Rocadenbosch Burillo, Francisco; Argyrouli, Athina; Tsaknakis, Georgios; Tzanis, Chris G. (EDP Sciences, 2017)
      Comunicació de congrés
      Accés obert
      The temporal evolution of the Planetary Boundary Layer height over Athens, Greece for a 5-year period (2011-2016) is presented. Using the EOLE Raman lidar system, the range-corrected lidar signals were selected around 12:00 ...
    • Polarimetric coherence optimization for interferometric differential applications 

      Pipia, Luca; Fabregas Canovas, Francisco Javier; Aguasca Solé, Alberto; López Martínez, Carlos; Mallorquí Franquet, Jordi Joan (2009)
      Text en actes de congrés
      Accés obert
      In this paper, the potentials of polarimetric coherenceoptimization techniques for differential interferometric SAR (DInSAR) applications are examined. For this purpose, the cutting-edge approaches available in the ...
    • 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 speckle noise effects in quantitative physical parameters retrieval 

      López Martínez, Carlos; Hajnsek, I.; Lee, J. S.; Pottier, Eric; Fabregas Canovas, Francisco Javier (IEE-INST ELEC ENG, 2006-06-30)
      Article
      Accés obert
      Quantitative estimation of physical parameters of the Earth's surface is currently an active area of research. Multidimensional synthetic aperture radar (SAR) systems appear in this framework as a tool capable of performing ...
    • 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)
      Text en actes de congrés
      Accés obert
    • Polarimetric temporal analysis of urban environments with a ground-based SAR 

      Pipia, Luca; Fabregas Canovas, Francisco Javier; Aguasca Solé, Alberto; López Martínez, Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2013-04)
      Article
      Accés restringit per política de l'editorial
      Revisiting time constitutes a key constraint for continuous monitoring activities based on space- and airborne synthetic aperture radar (SAR) acquisitions. Conversely, the employment of terrestrial platforms overcomes ...