Exploració per tema "Radar"

Ara es mostren els items 305-322 de 322

    • Target scattering characterization in sar polarimetry using model-free approaches 

      Dey, Subhadip; Bhattacharya, Avik; Frery, Alejandro C.; López Martínez, Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Comunicació de congrés
      Accés obert
      Target decomposition methods for polarimetric Synthetic Aperture Radar (PolSAR) data aim at explaining the scattering information. In this regard, several conventional model-based methods use scattering power components ...

    • 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, Antoni; 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 ...

    • Water level measurements with Fully-Focused SAR 

      Molina Burgués, Robert (Universitat Politècnica de Catalunya, 2022-07-04)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat
      Realitzat a/amb:   isardSAT
      With the growing concerns regarding the Climate Change phenomenon, the scientific community is putting a lot of effort into establishing empirical means to try and monitor its evolution over time. Specifically, inland ...

    • 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. ...

    • X-band UAV-SAR optimization and validation 

      Royo, Miquel (Universitat Politècnica de Catalunya, 2018-07)
      Treball Final de Grau
      Accés obert
      This project consists on the improvement of an already validated System, as it is the work of a finished PhD Thesis. Due to the wide range of that thesis, many sub blocs need to be revaluated and optimized. That is the ...