Exploració per tema "Radar"

Ara es mostren els items 282-301 de 322

    • SAR Interferometric phase noise reduction using wavelet transform 

      López Martínez, Carlos; Cànovas, Xavier Fàbregas; Chandra, A. M. (IEE-INST ELEC ENG, 2001-05-31)
      Article
      Accés obert
      The problem of synthetic aperture radar interferometric phase noise reduction is addressed. A new technique based on discrete wavelet transforms is presented. This technique guarantees high resolution phase estimation ...

    • Sea Surface Height retrieval using GNSS Reflected Signals 

      Esteban Cabezos, Héctor (Universitat Politècnica de Catalunya, 2017-06)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   University of Colorado Boulder
      This work is the result of 6 months of work devoted to the analysis of GNSS scattered signals over coastal Sea. It starts introducing different ways of monitoring Sea surface level focusing on the use of GNSS reflected ...

    • Sección recta de blancos radar complejos en tiempo real 

      Rius Casals, Juan Manuel (Universitat Politècnica de Catalunya, 1991-07-08)
      Tesi
      Accés obert
      Este trabajo resuelve el problema de gran interés para la industria aeronáutica: el cálculo de la sección recta (RCS) de blancos radar complejos en tiempo real. Para ello basta una estación de trabajo con un acelerador ...

    • Signal acquisition and pre-processing subsystem for CW-FM radars 

      Hernández Burgos, Sergi (Universitat Politècnica de Catalunya, 2018-07)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat
      High resolution radar performance is critically affected by the quality of signal acquisition and first level processing subsystems which implement a filter mached to the transmitted waveform. In the case of CW-FM radars, ...

    • Signal power variation for bio-radar applications 

      Gouveia, Carolina; Cruz, Beatriz; Pinho, Pedro; Albuquerque, Daniel (Universitat Politècnica de Catalunya. Remote Sensing, Antennas, Microwaves and Superconductivity Group (CommSensLab), 2022)
      Text en actes de congrés
      Accés obert
      Micro-Doppler radars have been widely used for the remote vital signs acquisition. In those cases, the signals quality is directly related with the received power provided by the reflecting chest-wall. In order to ...

    • Simulació estadística de clutter marí amb models de distribució K 

      González Moragas, Oriol (Universitat Politècnica de Catalunya, 2011-09-07)
      Projecte/Treball Final de Carrera
      Accés obert
      English: The aim of this project is the simulation of the radar echo signal scattered by the sea surface which is called "Sea clutter". This project is related with the SAR MTI systems which are a type of radar systems ...

    • Simulación de ecos radar del tipo Weibull correlado y coherente 

      Elias Fusté, Antoni; de los Reyes, Elías; Fernández de Muniain, Javier (1989)
      Text en actes de congrés
      Accés obert
      A canonical model is examinated for generating coherent Weibull vectors wi th a desired correlation matrix and specified parameters. Such vectors may represent samples of a correlated radar signal. Statistical and espectral ...

    • Simulación de un radar pulsado para el control de aeronaves 

      Sánchez Orduña, Quim (Universitat Politècnica de Catalunya, 2011-06)
      Projecte/Treball Final de Carrera
      Accés obert
      El proyecto de final de carrera tiene como objetivo la simulación de un radar pulsado, cuya aplicación será detectar aeronaves en función de la meteorología. Crearemos un panel de control dónde poder seleccionar todos ...

    • Simulador de señales radar para visualización en un P.P.I 

      Aguasca Solé, Alberto; Elias Fusté, Antoni; Broquetas Ibars, Antoni (1989)
      Text en actes de congrés
      Accés obert
      This paper shows the a student training RADAR computer to control it, simulated and introduced transformation of a non-coherent X-band RADAR in station. Using the RADAR P. P. I and a personal Rayleigh targets and clutter ...

    • Simulador de señales radar para visualización en un PPI 

      Aguasca Solé, Alberto; Elias Fusté, Antoni; Broquetas Ibars, Antoni (1998)
      Text en actes de congrés
      Accés obert
      This paper shows the a student training RADAR computer to control it, simulated and introduced transformation of a non-coherent X-band RADAR in station. Using the RADAR P. P. I and a personal Rayleigh targets and clutter ...

    • Simulador de sistemas radar 

      Elias Fusté, Antoni (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, Antoni; 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.

    • Size matters in quantitative radar monitoring of animal migration: estimating monitored volume from wingbeat frequency 

      Schmid, Baptiste; Zaugg, Serge Alain; Votier, Stephen C.; Chapman, Jason W.; Boos, Mathieu; Liechti, Felix (2019-01-14)
      Article
      Accés obert
      Quantitative radar studies are an important component of studying the movements of birds. Whether a bird, at a certain distance from the radar, is detected or not depends on its size. The volume monitored by the radar is ...

    • SMF-POLOPT: an adaptive multitemporal pol(DIn)SAR filtering and phase optimization algorithm for PSI applications 

      Zhao, Feng; Mallorquí Franquet, Jordi Joan (Institute of Electrical and Electronics Engineers (IEEE), 2019-09-01)
      Article
      Accés obert
      Speckle noise and decorrelation can hamper the application and interpretation of PolSAR images. In this paper, a new adaptive multitemporal Pol(DIn)SAR filtering and phase optimization algorithm is proposed to address these ...

    • SMOS instrument performance after more than 8 years in orbit and lessons learnt for future L-band missions 

      Martín Neira, Manuel; Oliva Balagué, Roger; Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Duffo Ubeda, Núria; Durán Martínez, Israel; Kainulainen, Juha; Closa Soteras, Josep; Zurita Campos, Alberto Manuel; Cabot, François; Khazaal, Ali; Anterrieu, E.; Barbosa, José; Tenerelli, Joseph; Díez, Raúl; Turiel, Antonio; González Gambau, Verónica (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial

    • SNR degradation in GNSS-R measurements under the effects of radio-frequency interference 

      Querol Borràs, Jorge; Alonso Arroyo, Alberto; Onrubia Ibáñez, Raúl; Pascual Biosca, Daniel; Hyuk, Park; Camps Carmona, Adriano José (2016-08-24)
      Article
      Accés obert
      Radio-frequency interference (RFI) is a serious threat for systems working with low power signals such as those coming from the global navigation satellite systems (GNSS). The spectral separation coefficient (SSC) is the ...

    • Soil Moisture estimation using polarimetric SAR 

      Closa Tarres, Marc (Universitat Politècnica de Catalunya, 2019-08)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   University of Massachusetts at Amherst
      La humedad del suelo es una variable primaria para comprender el ciclo hidrológico global. En las disciplinas de ciencias de la Tierra y del medio ambiente, la estimación de este parámetro en alta resolución siempre ha ...

    • 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 ...

    • SPOT and GPRS drifting buoys for HF Radar calibration 

      Martínez Fernández, Adrián; Redondo Caride, Waldo; Alonso Pérez, Fernando; Piedracoba Varela, Silvia; Lorente Jiménez, Pablo; Montero Vilar, Pedro; Torres López, Silvia; Fernández Baladrón, Adrián; Varela Benvenuto, Ramiro Alberto; Velo Lanchas, Antón; Gil Coto, Miguel (SARTI, 2021)
      Article
      Accés obert
      Traditional drifting buoys have been designed to measure the surface currents at a nominal depth of 15m with drogues of 6m height. Herein, in order to assess the performance of HF Radars two designs of Lagrangian drifting ...