Exploració per tema "Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Radar"

Ara es mostren els items 1-20 de 311

    • 3Cat-3/MOTS nanosatellite mission for optical multispectral and GNSS-R Earth Observation: concept and analysis 

      Castellví Esturi, Jordi; Camps Carmona, Adriano José; Corbera Fauria, Jordi; Alamús, Ramón (Multidisciplinary Digital Publishing Institute (MDPI), 2018-01-06)
      Article
      Accés obert
      The 3Cat-3/MOTS (3: Cube, Cat: Catalunya, 3: 3rd CubeSat mission/Missió Observació Terra Satèl·lit) mission is a joint initiative between the Institut Cartogràfic i Geològic de Catalunya (ICGC) and the Universitat Politècnica ...

    • A bluetooth low energy indoor positioning system with channel diversity, weighted trilateration and Kalman filtering 

      Cantón Paterna, Vicente; Calveras Augé, Anna M.; Paradells Aspas, Josep; Perez Bullones, Maria Antonia (Multidisciplinary Digital Publishing Institute (MDPI), 2017-12-01)
      Article
      Accés obert
      Indoor Positioning Systems (IPS) using Bluetooth Low Energy (BLE) technology are currently becoming real and available, which has made them grow in popularity and use. However, there are still plenty of challenges related ...

    • A comparative study of operational vessel detectors for maritime surveillance using satellite-borne synthetic aperture radar 

      Stasolla, Mattia; Mallorquí Franquet, Jordi Joan; Margarit, Gerard; Santamaría, Carlos; Walker, Nick (2016-06-01)
      Article
      Accés obert
      This paper presents a comparative study among four operational detectors that work by automatically post-processing synthetic aperture radar (SAR) images acquired from the satellite platforms RADARSAT-2 and COSMO-SkyMed. ...

    • A comparison of different techniques for atmospheric artefact compensation in GBSAR differential acquisitions 

      Pipia, Luca; Fabregas Canovas, Francisco Javier; Aguasca Solé, Alberto; Mallorquí Franquet, Jordi Joan (IEEE, 2006)
      Text en actes de congrés
      Accés obert
      In this paper, a comparison of different techniques for compensating the atmospheric artifacts in Ground-Based SAR zero-baseline acquisitions at X-Band is presented. The way the fluctuation of atmospheric parameters like ...

    • A dual-mode Ultra-Wideband wireless platform for remote patient monitoring systems 

      Bisbe Novoa, Sergi; Reyes Navarro, Carlos Alberto (Universitat Politècnica de Catalunya, 2012-07-11)
      Projecte Final de Màster Oficial
      Accés obert
      The combination of two factors demands the need to find a solution that guarantees the well-being of the people suffering from chronic diseases. On the one hand, the increase of the life expectancy leads to an older world's ...

    • A fully-focused SAR omega-K closed-form algorithm for the Sentinel-6 radar altimeter: methodology and applications 

      Hernández Burgos, Sergi; Gibert Gutiérrez, Ferran; Broquetas Ibars, Antoni; Kleinherenbrink, Marcel; Flores De la Cruz, Adrián; Gómez Olivé, Adrià; García Mondéjar, Albert; Roca Aparici, Mònica (Institute of Electrical and Electronics Engineers (IEEE), 2024-01-01)
      Article
      Accés obert
      The 2-D frequency-based omega-K method is known to be a suitable algorithm for fully focused SAR (FF-SAR) radar altimeter processors, as its computational efficiency is much higher than equivalent time-based alternatives ...

    • A Ku-band geosynchronous synthetic aperture radar mission analysis with medium transmitted power and medium-sized antenna 

      Ruiz, Josep; Broquetas Ibars, Antoni; Monti Guarnieri, Andrea; Rocca, Fabio (IEEE, 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper, the feasibility of a geosynchronous satellite for Synthetic Aperture Radar applications is assessed. The nearly fixed position of geosynchronous satellites offers new features to SAR acquisition such as ...

    • A maximum likelihood analysis of the RVoG model for forestry studies in polarimetric SAR interferometry 

      López Martínez, Carlos; Alonso González, Alberto (European Space Agency (ESA), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This work analyses the validity of the RVoG model as- sumption in case of PolInSAR data in forestry analy- sis. In order to assure that the interferometric coherence describes a line, as imposed by the RVoG model, ...

    • A model-free four component scattering power decomposition for polarimetric SAR data 

      Dey, Subhadip; Bhattacharya, Avik; Frery, Alejandro C.; López Martínez, Carlos; Rao, Yalamanchili S. (Institute of Electrical and Electronics Engineers (IEEE), 2021-03-29)
      Article
      Accés obert
      Target decomposition methods of polarimetric Synthetic Aperture Radar (PolSAR) data explain scattering information from a target. In this regard, several conventional model-based methods utilize scattering power components ...

    • A multi-frequency SDR-based GBSAR: System overview and first results 

      Amézaga Sarries, Adrià; López Martínez, Carlos; Jové Casulleras, Roger (Multidisciplinary Digital Publishing Institute (MDPI), 2021-04-21)
      Article
      Accés obert
      This work describes a system-level overview of a multi-frequency GBSAR built around a high performance software defined radio (SDR). The main goal of the instrument is to be employed as a demonstrator and experimental ...

    • A new approach to DInSAR pixel selection with a combined multi resolution selection method 

      Centolanza, Giuseppe; Iglesias González, Rubén; Monells Miralles, Daniel; Mallorquí Franquet, Jordi Joan (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In DInSAR processing it is possible to detect different kinds of targets at different resolutions. Point like scatters can be selected with high resolution selection methods, like amplitude dispersion. Distributed scatters ...

    • A new approach to DInSAR pixel selection with spectral correlation along time between Sublooks 

      Iglesias González, Rubén; Monells Miralles, Daniel; Centolanza, Giuseppe; Mallorquí Franquet, Jordi Joan (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents a full resolution pixel selection method, alternative to the traditional ones, which is based on the study of the spectral correlation coefficient along time among different Sublooks of the image ...

    • A new methodology to characterise the radar bright band using doppler spectral moments from vertically pointing radar observations 

      Garcia Benadí, Albert; Bech, Joan; González Herrero, Sergi; Udina, Mireia; Codina Sánchez, Bernat (Multidisciplinary Digital Publishing Institute (MDPI), 2021-10-27)
      Article
      Accés obert
      The detection and characterisation of the radar Bright Band (BB) are essential for many applications of weather radar quantitative precipitation estimates, such as heavy rainfall surveillance, hydrological modelling or ...

    • A novel approach for absolute radar calibration: formulation and theoretical validation 

      Merker, Claire; Peters, Gerhard; Clemens, Marco; Lengfeld, Katharina; Ament, Felix (2015-06)
      Article
      Accés obert
      The theoretical framework of a novel approach for absolute radar calibration is presented and its potential analysed by means of synthetic data to lay out a solid basis for future practical application. The method presents ...

    • A novel strategy for radar imaging based on compressive sensing 

      Tello Alonso, Mª Victoria; López Dekker, Francisco J.; Mallorquí Franquet, Jordi Joan (2008)
      Text en actes de congrés
      Accés obert
      This paper aims at introducing the recent theory of compressive sensing to radar imaging systems in order to retrieve the imaged scene with better resolution and a reduced amount of collected samples. As a result of ...

    • A performance evaluation of SAR-GMTI missions for maritime applications 

      Makhoul Varona, Eduardo; Broquetas Ibars, Antoni; Ruiz Rodon, Josep; Zhan, Yu; Ceba Vega, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2015-05-01)
      Article
      Accés obert
      This paper proposes a new optimized multichannel synthetic aperture radar (SAR) configuration, based on receiving antennas with nonuniformly displaced phase centers, intended for ground moving target indication (GMTI) ...

    • A persistent scatterer interferometry procedure to monitor urban subsidence 

      Crosetto, Michele; Monserrat, Oriol; Barra, Anna; Cuevas-González, Maria; Krishnakumar, Vrinda; Mróz, Marek; Crippa, Bruno (2019)
      Text en actes de congrés
      Accés obert
      This paper describes a Persistent Scatterer Interferometry procedure for deformation monitoring. Its more original part concerns an approach to estimate the atmospheric phase component. The procedure can be used to monitor ...

    • A temporal phase coherence estimation algorithm 

      Zhao, Feng; Mallorquí Franquet, Jordi Joan (VDE Conference Publications, 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Pixel selection is a critical procedure in DInSAR processing. In this paper a new temporal phase coherence (TPC) estimation algorithm is proposed for the pixel selection. TPC is calculated based on the estimated interferometric ...

    • Acceleration of synthetic aperture radar for on-board space systems 

      Solé i Bonet, Marc; Rodríguez Ferrández, Iván; Steenari, David; Kosmidis, Leonidas (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Text en actes de congrés
      Accés obert
      There is an increasing trend in modern space systems to move processing that until now was transmitted to ground for processing, on board the satellite. Synthetic Aperture Radar (SAR) is an example of such processing. ...

    • ACE-OT: Polarimetric SAR data based amplitude contrast enhancement algorithm for offset tracking applications 

      Du, Sen; Mallorquí Franquet, Jordi Joan; Zhao, Feng (Institute of Electrical and Electronics Engineers (IEEE), 2022-08-01)
      Article
      Accés obert
      The use of polarimetric synthetic aperture radar (SAR) data can improve the performance of persistent scatterer interferometry (PSI). However, its huge potential remains locked for the amplitude information-based offset ...