Ara es mostren els items 1-20 de 25

    • A measure of flow vorticity with twisted beams of light 

      Belmonte Molina, Aniceto; Rosales Guzmán, Carmelo; Pérez Torres, Juan (Curran, 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The measurement of vorticity, a parameter providing local measurements of rotation at every point in a flow, would greatly assist research fields as diverse as biology microfluidics, complex motions in the oceanic and ...
    • A trajectory-driven 3D channel model for human activity recognition 

      Abdelgawwad, Ahmed Abdelmonem; Català Mallofré, Andreu; Pätzold, Matthias (Institute of Electrical and Electronics Engineers (IEEE), 2021-07-28)
      Article
      Accés obert
      This paper concerns the design, analysis, and simulation of a 3D non-stationary channel model fed with inertial measurement unit (IMU) data. The work in this paper provides a framework for simulating the micro-Doppler ...
    • Aircraft localization using a passive acoustic method. Experimental test 

      Martín Román, Sara-Regina; Genesca Francitorra, Meritxell; Romeu Garbí, Jordi; Clot Razquin, Arnau (2016-01)
      Article
      Accés obert
      A passive acoustic method for aircraft localization is experimentally tested in this paper. The method relies on the Doppler effect influencing the signals received by a mesh of microphones distributed over the acoustic ...
    • Analyzing Anomalous Artefacts in TDS-1 Delay Doppler Maps 

      Hu, Changjiang; Benson, Craig; Hyuk, Park; Camps Carmona, Adriano José; Li, Qiao; Rizos, Chris (2019)
      Text en actes de congrés
      Accés obert
      Global Navigation Satellite System Reflectometry (GNSS-R) uses the GNSS reflected signals to study parameters of the Earth's surface such as ocean surface height, wind speed, soil moisture, sea surface target detection. ...
    • Channel maps and stochastic models in elevation based on measurements in operating networks 

      Yu, Jiwei; Yin, Xuefeng; Chen, Jiajing; Zhang, Nan; Zhong, Zhimeng; Duan, Weiming; Ruiz Boqué, Sílvia (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this contribution, a channel measurement campaign recently carried out in the Jiading campus of Tongji University, Shanghai, China, is introduced. The downlink signals of an active Universal Mobile Telecommunications ...
    • Combined current profiling and biological echosounding results from a single ADCP 

      Velasco, David W.; Nylund, Sven; Molina Pacheco, Cristobal (SARTI, 2018)
      Article
      Accés obert
      The present work describes a newly-developed Acoustic Doppler Current Profiler (ADCP) that has a fully integrated single-beam wide-band biological echosounder, thus serving a dual purpose: current measurement and biomass ...
    • Data comparison between three acoustic doppler current profilers deployed in OBSEA platform in North-Western Mediterranean 

      Carandell Widmer, Matias; Nogueras Cervera, Marc (SARTI, 2016)
      Comunicació de congrés
      Accés obert
      Three different Acoustic Doppler Current Profilers (ADCP) have been deployed in OBSEA platform, a 20 meters depth underwater observatory cabled with a 4 km mixt cable to Vilanova i la Geltru’s coast. Two months of ...
    • Data comparison between three acoustic doppler current profilers deployed in OBSEA platform in north-western Mediterranean 

      Carandell Widmer, Matias; Nogueras Cervera, Marc; Chumbinho, Rogério; Molina, Cristiobal (2016)
      Text en actes de congrés
      Accés obert
      Three different Acoustic Doppler Current Profilers (ADCP) have been deployed in OBSEA platform, a 20 meters depth underwater observatory cabled with a 4 km mixt cable to Vilanova i la Geltru’s coast. Two months of continuous ...
    • Development of a low cost, self-configuring ADCP and integrated deployment and recovery system 

      Velasco, David W.; Molina Pacheco, Cristobal (SARTI, 2021)
      Article
      Accés obert
      Here we present the development of a short range (0.5 to 20 m), low cost (< USD 5,000), three-beam, 1 MHz acoustic Doppler current profler called the Nortek ECO. The system employs a robust wideband velocity measurement ...
    • Direction-sensitive transverse velocity measurement by phase-modulated structured light beams 

      Rosales Guzmán, Carmelo; Hermosa, Nathaniel; Belmonte Molina, Aniceto; Pérez Torres, Juan (2014-09-15)
      Article
      Accés restringit per política de l'editorial
      The use of structured light beams to detect the velocity of targets moving perpendicularly to the beam's propagation axis opens new avenues for remote sensing of moving objects. However, determining the direction of motion ...
    • Experimental detection of transverse particle movement with structured light 

      Rosales Guzmán, Carmelo; Hermosa, Nathaniel; Belmonte Molina, Aniceto; Pérez Torres, Juan (MACMILLAN PUBLISHERS LIMITED, 2013-10-02)
      Article
      Accés obert
      One procedure widely used to detect the velocity of a moving object is by using the Doppler effect. This is the perceived change in frequency of a wave caused by the relative motion between the emitter and the detector, ...
    • First Delay Doppler Maps obtained with the Microwave Inteferometric Reflectometer (MIR) 

      Pascual, Daniel; Onrubia Ibáñez, Raúl; Querol Borràs, Jorge; Alonso Arroyo, Alberto; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This work presents the first Delay Doppler Maps (DDMs) obtained with the Microwave Interferometric Reflectometer (MIR) airborne instrument. MIR is a GNSS Reflectometer (GNSS-R) which uses the conventional (cGNSS-R) and ...
    • First Delay Doppler Maps obtained with the Microwave Interferometric Reflectometer (MIR) 

      Pascual Biosca, Daniel; Onrubia Ibáñez, Raúl; Querol Borràs, Jorge; Alonso Arroyo, Alberto; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The use of Global Navigation Satellite System (GNSS) signals for mesoscale altimetry was first proposed in [1]. Since then, many experiments and a couple of space missions have been carried out to validate the concept in ...
    • Implementation of a GNSS-R payload based on software defined radio for the 3CAT-2 mission 

      Olivé Muñiz, Roger; Amézaga Sarries, Adrià; Carreno-Luengo, Hugo; Hyuk, Park; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2016-10-01)
      Article
      Accés obert
      The 3CAT-2 nanosatellite aims at demonstrating global navigation satellite system reflectometry (GNSS-R) techniques for spaceborne applications in the small form of a six-unit CubeSat. There are many challenges involved ...
    • Improvement of PAU/PARIS end-to-end performance simulator (P2EPS): land scattering including topography 

      Hyuk, Park; Camps Carmona, Adriano José; Pascual Biosca, Daniel; Alonso Arroyo, Alberto; Querol Borràs, Jorge; Onrubia Ibáñez, Raúl (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This work presents an improvement of the P2EPS end-to-end simulator to assess the performances of Global Navigation Satellite System Reflectometry (GNSS-R) space missions over land. Beyond the single specular reflection ...
    • Measurement of flow vorticity with helical beams of light 

      Belmonte Molina, Aniceto; Rosales Guzmán, Carmelo; Torres, Juan P. (Optical Society of American (OSA), 2015-11-20)
      Article
      Accés obert
      It is possible to devise an experiment in which the local vorticity of a flow can be estimated by probing the fluid with Laguerre–Gauss (LG) beams, i.e., optical beams that show an azimuthal phase variation that is the ...
    • Measuring the translational and rotational velocities of particles in helical motion using structured light 

      Rosales Guzmán, Carmelo; Hermosa, Nathaniel; Belmonte Molina, Aniceto; Pérez Torres, Juan (2014-06-30)
      Article
      Accés obert
      We measure the rotational and translational velocity components of particles moving in helical motion under a Laguerre-Gaussian mode illumination. The moving particle reflects light that acquires an additional frequency ...
    • Medición confocal de la velocidad con que una emulsión fluye en el centro de un capilar utilizando interferometría realimentada 

      Yáñez Alvarado, Carlos René; Royo Royo, Santiago (Asociación Científica de Óptica y Fotónica de Santiago, 2017)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      En este trabajo se presenta un novedoso sistema confocal de flujometría láser Doppler. Por medio de una técnica de interferometría realimentada, se infiere la frecuencia Doppler relativa a la velocidad con que fluye una ...
    • Optical feedback flowmetry: impact of particle concentration on the signal processing method 

      Atashkhooei, Reza; Ramírez Miquet, Evelio E.; Moreira, Raul da Costa; Quotb, Adam; Royo Royo, Santiago; Perchoux, Julien (2017-12-11)
      Article
      Accés obert
      IEEE Optical feedback interferometry (OFI) based flowmetry enables simple, robust, self-aligned and low cost systems to measure the fluid flow velocity with reasonable accuracy. The particle concentration in the fluid ...
    • Passive acoustic method for aircraft localization 

      Martín Román, Sara-Regina (Universitat Politècnica de Catalunya, 2013-07-15)
      Tesi
      Accés obert
      The present thesis investigates a passive acoustic method to locate maneuvering aircraft. The method is based on the acoustical Doppler effect, as a particular effect of the signals received by a mesh of spatially distributed ...