Recent Submissions

  • Correcting the ADCS jitter induced blurring in small satellite imagery 

    Llaveria Godoy, David; Camps Carmona, Adriano José; Hyuk, Park (2020-09)
    Article
    Open Access
    Earth Observation missions have increasingly demanding requirements, i.e., higher spatial resolutions and SNR, and lower revisit times, etc. High-resolution images have to be captured with precise pointing accuracy which ...
  • Characterisation of copper and stainless steel surfaces treated with laser ablation surface engineering 

    Hannah, Adrian N.; Krkotic, Patrick; Valizadeh, Reza; Malyshev, Oleg; Mutch, J.; Whitehead, David J.; Pont, Montse; O'Callaghan Castellà, Juan Manuel; Dhanak, Vinod R. (2021-07)
    Article
    Restricted access - publisher's policy
    In the past few years, it has been established that Laser Ablation Surface Engineering (LASE) is a very effective way of producing surfaces which have Secondary Electron Yields (SEY)¿<¿1. This can be achieved with a variety ...
  • Random-Walk laplacian for frequency analysis in periodic graphs 

    Boukrab, Rachid; Pagès Zamora, Alba Maria (Multidisciplinary Digital Publishing Institute (MDPI), 2021-02-11)
    Article
    Open Access
    This paper presents the benefits of using the random-walk normalized Laplacian matrix as a graph-shift operator and defines the frequencies of a graph by the eigenvalues of this matrix. A criterion to order these frequencies ...
  • Sea ice thickness estimation based on regression neural networks using L-band microwave radiometry data from the FSSCat mission 

    Herbert, Christoph Josef; Muñoz Martin, Joan Francesc; Llaveria Godoy, David; Pablos, Miriam; Camps Carmona, Adriano José (Multidisciplinary Digital Publishing Institute (MDPI), 2021-04-02)
    Article
    Open Access
    Several methods have been developed to provide polar maps of sea ice thickness (SIT) from L-band brightness temperature (TB) and altimetry data. Current process-based inversion methods to yield SIT fail to address the ...
  • Asymmetrical clipping optical filter bank multi-carrier modulation scheme 

    Ibrahim Mohamed Badr, Asmaa; Prat Gomà, Josep Joan; Ismail, Tawfik (2021-05)
    Article
    Restricted access - publisher's policy
    Filter bank multi-carrier (FBMC) is considered a promising alternative to the Orthogonal Frequency Division Multiplexing (OFDM) scheme. It improves spectral efficiency by eliminating the need for cyclic prefix while ...
  • Quality of transmission estimator retraining for dynamic optimization in optical networks 

    Mahajan, Ankush; Christodoulopoulos, Konstantinos; Martínez Rivera, Ricardo Victor; Muñoz González, Raül; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2021-04-01)
    Article
    Restricted access - publisher's policy
    Optical network optimization involves an algorithm and a physical layer model (PLM) to estimate the quality of transmission of connections while examining candidate optimization operations. In particular, the algorithm ...
  • Spectral processing techniques for efficient monitoring in optical networks 

    Locatelli, Fabiano; Christodoulopoulos, Konstantinos; Svaluto Moreolo, Michela; Fàbrega Sánchez, Josep Maria; Nadal Reixats, Laia; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2021-07-01)
    Article
    Restricted access - publisher's policy
    Having ubiquitous optical monitors in dense wavelength-division multiplexing (DWDM) or flex-grid networks allows the estimation in real time of crucial parameters. Such monitoring would be even more important in disaggregated ...
  • Optical phase effects in reconfigurable microwave photonic filters with multiple wavelength input 

    Nuño Gómez, Daniel-Juan; Santos Blanco, M. Concepción (2021-11)
    Article
    Open Access
    Microwave photonic filters with a multiple wavelength input are analyzed. A comprehensive model assessing the impact of the phase characteristic of the optical stage is presented from which optimized design rules have been ...
  • A novel RFI detection method for microwave radiometers using multilag correlators 

    Díez García, Raúl; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2021-02-10)
    Article
    Open Access
    Radio frequency interference (RFI) is an increasing problem in microwave radiometry, particularly for Earth observation, because the antennas are pointing toward the Earth. RFI has been observed at the L-band in European ...
  • On differential imaging using electromagnetic simulation for vehicular antenna signature analysis 

    Solano Pérez, José Antonio; Martinez Ingles, Maria Teresa; Molina García-Pardo, José María; Romeu Robert, Jordi; Jofre Roca, Lluís; Ballesteros Sánchez, Christian; Rodríguez Rodríguez, José Víctor; Mateo Aroca, Antonio; Guzmán Quirós, Raúl (Multidisciplinary Digital Publishing Institute (MDPI), 2021-05-30)
    Article
    Open Access
    The current trend in vehicles is to integrate a wide number of antennae and sensors operating at a variety of frequencies for sensing and communications. The integration of these antennae and sensors in the vehicle platform ...
  • Algorithm for resonator parameter extraction from symmetrical and asymmetrical transmission responses 

    Krkotic, Patrick; Gallardo Moix, Queralt; Tagdulang, Nikki; Pont Montaner, Montserrat; O'Callaghan Castellà, Juan Manuel (IEEE Microwave Theory and Techniques Society, 2021-06-07)
    Article
    Open Access
    We describe an algorithm capable of extracting the unloaded quality factor and the resonant frequency of microwave resonators from vector S-parameters. Both symmetrical (Lorentzian) and asymmetrical (Fano) transmission ...
  • Design and Testing of a Helix Antenna Deployment System for a 1U CubeSat 

    Sureda Anfres, Miquel; Sobrino Hidalgo, Marco; Millán, Oriol; Aguilella, Andrea; Solanellas Bofarull, Arnau; Badia Ballús, Marc; Muñoz Martin, Joan Francesc; Fernandez Capon, Lara Pilar; Ruiz De Azúa Ortega, Juan Adrián; Camps Carmona, Adriano José (Institute of Electrical and Electronics Engineers (IEEE), 2021-05)
    Article
    Open Access
    CubeSats have revolutionized Earth Observation and space science, although their small size severely restricts satellite performance and payload. Antenna deployment from a stowed configuration in these small-satellites ...

View more