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  • Snow and ice thickness retrievals using GNSS-R: Preliminary results of the mosaic experiment 

    Muñoz Martin, Joan Francesc; Pérez Portero, Adrián; Camps Carmona, Adriano José; Ribó Vedrilla, Serni; Cardellach Galí, Estel; Stroeve, Julienne; Nandan, Vishnu; Itkin, Polona; Tonboe, Rasmus; Hendricks, Stefan; Huntemann, Marcus; Spreen, Gunnar; Pastena, Massimiliano (Multidisciplinary Digital Publishing Institute (MDPI), 2020-12-02)
    Article
    Open Access
    The FSSCat mission was the 2017 ESA Sentinel Small Satellite (S^3) Challenge winner and the Copernicus Masters competition overall winner. It was successfully launched on 3 September 2020 onboard the VEGA SSMS PoC (VV16). ...

  • From bilingual to multilingual neural-based machine translation by incremental training 

    Escolano Peinado, Carlos; Ruiz Costa-Jussà, Marta; Rodríguez Fonollosa, José Adrián (2020-08-02)
    Article
    Open Access
    A common intermediate language representation in neural machine translation can be used to extend bilingual systems by incremental training. We propose a new architecture based on introducing an interlingual loss as an ...

  • Analytical computation of the spatial resolution in GNSS-R and experimental validation at L1 and L5 

    Camps Carmona, Adriano José; Muñoz Martin, Joan Francesc (Multidisciplinary Digital Publishing Institute (MDPI), 2020-11-28)
    Article
    Open Access
    Global navigation satellite systems reflectometry (GNSS-R) is a relatively novel remote sensing technique, but it can be understood as a multi-static radar using satellite navigation signals as signals of opportunity. The ...

  • Downlink multi-user massive MIMO transmission using receive spatial modulation 

    Raafat Hosny Mohamed Fahm, Ahmed; Agustín de Dios, Adrián; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2020-10-01)
    Article
    Open Access
    In this paper, we consider the downlink of a multi-user multiple-input-multiple-output system operating at the millimeter wave band in an outdoor environment. In this band, receive spatial modulation (RSM) schemes have ...

  • Tone injection-based cancellation technique for nonlinear distortion reduction of modulated signals in BAW resonators 

    González Rodríguez, Marta; Collado Gómez, Juan Carlos; González Arbesú, José María; Mateu Mateu, Jordi; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís (2020-01-01)
    Article
    Open Access
    A technique for the reduction of third-order intermodulation distortion (IMD3) occurring in bulk acoustic wave (BAW) filters and multiplexers is presented. The method consists of using the intrinsic second-order intermodulation ...

  • Estimation of wave period from pitch and roll of a lidar buoy 

    Salcedo Bosch, Andreu; Rocadenbosch Burillo, Francisco; Gutiérrez Antuñano, Miguel Ángel; Tiana Alsina, Jordi (Multidisciplinary Digital Publishing Institute (MDPI), 2021-02-12)
    Article
    Open Access
    This work proposes a new wave-period estimation (L-dB) method based on the power-spectral-density (PSD) estimation of pitch and roll motional time series of a Doppler wind lidar buoy under the assumption of small angles ...

  • Deployment mechanism for a L-band helix antenna in 1-Unit Cubesat 

    Fernandez Capon, Lara Pilar; Sobrino Hidalgo, Marco; Milian, Oriol; Aguilella, Andrea; Solanellas Bofarull, Arnau; Badia Ballús, Marc; Muñoz Martin, Joan Francesc; Ruiz De Azúa Ortega, Juan Adrián; Sureda Anfres, Miquel; Camps Carmona, Adriano José (2020-09-08)
    Article
    Restricted access - publisher's policy
    Recently, there is a renewed interest in Earth Observation (EO) of the cryosphere as a proxy of global warming, soil moisture for agriculture and desertification studies, and biomass for carbon storage. Global Navigation ...

  • The flexible microwave payload-2: A SDR-based GNSS-reflectometer and L-Band radiometer for CubeSats 

    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), 2020-03-23)
    Article
    Open Access
    This article presents the FMPL-2 on board the FSSCat mission, the 2017 ESA Small Sentinel Satellite Challenge and overall Copernicus Masters Competition winner. FMPL-2 is a passive microwave instrument based on a ...

  • Coherent ultra-dense WDM-PON enabled by complexity-reduced digital transceivers 

    Tabares Giraldo, Jeison; Ghasemi, Saeed; Velásquez Micolta, Juan Camilo; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2020-03-15)
    Article
    Open Access
    Coherent technologies, along with digital signal processing (DSP), have revolutionized optical communication systems, significantly increasing the capacity of the fiber channel owing to transmission of advanced modulation ...

  • First evidences of ionospheric plasma depletions observations using GNSS-R data from CYGNSS 

    Molina Ordóñez, Carlos; Camps Carmona, Adriano José (Multidisciplinary Digital Publishing Institute (MDPI), 2020-11-02)
    Article
    Open Access
    At some frequencies, Earth’s ionosphere may significantly impact satellite communications, Global Navigation Satellite Systems (GNSS) positioning, and Earth Observation measurements. Due to the temporal and spatial variations ...

  • Hybrid massive MIMO for urban V2I: Sub-6 GHz vs mmWave performance assessment 

    Pfadler, Andreas; Ballesteros Sánchez, Christian; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2020-03)
    Article
    Open Access
    The relevance of vehicle communications in next-generation networks entails the necessity of studying their performance in the framework of upcoming massive architectures. In this regard, a study of the wireless channel ...

  • Discontinuous user-energy distribution for dynamically ordered successive interference cancellation 

    Molina Oliveras, Francesc; Sala Álvarez, José (2021-01-28)
    Article
    Open Access
    In this letter, we consider many users sharing the same codebook and employing random signatures to modulate preamble plus payload data. Successive interference cancellation (SIC) is performed at the receiver side, whereby ...

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