Browsing Recerca by Subject "Ones de ràdio -- Propagació"

Now showing items 1-5 of 5

    • Advanced HF Communications for Remote Sensors in Antarctica 

      Porté Jiménez, Joaquim; Pijoan Vidal, Joan Lluís; Masó Llinàs, Josep M.; Badia Folguera, David; Zaballos Diego, Agustín; Alsina Pagès, Rosa Maria (Antarctica - A Key To Global Change, 2018-11)
      There is a strong research activity in Antarctica in the fields of geophysics, meteorology, wildlife, flora, oceanography, and environment, among others. This research activity often involves the ...

    • Ionospheric Narrowband and Wideband HF Soundings for Communications Purposes: A Review 

      Hervás García, Marcos; Bergadà Caramés, Pau; Alsina Pagès, Rosa Maria (Sensors, 2020, Vol. 20 No 9, 2020-04)
      High Frequency (HF) communications through ionospheric reflection is a widely usedtechnique specifically for maritime, aeronautical, and emergency services communication withremote areas due ...

    • Ionospheric Polarization Techniques for Robust NVIS Remote Sensing Platforms 

      Malé Vilà, Jordi; Porté Jiménez, Joaquim; Masó Llinàs, Josep M.; Pijoan Vidal, Joan Lluís; Badia Folguera, David (Applied Sciences, 2020, 10(11), 3730, 2020-05)
      Every year more interest is focused on high frequencies (HF) communications for remotesensing platforms due to their capacity to establish links of more than 250 km without a line ofsight and due to ...

    • Study of NVIS Channel for USN Protocol Definition in Antarctica 

      Masó Llinàs, Josep M.; Porté Jiménez, Joaquim; Pijoan Vidal, Joan Lluís; Badia Folguera, David (Electronics, 2020, Vol. 9, No. 6, 2020-06)
      Every year, the number of ubiquitous sensor networks (USN) is increasing and the need for remote USN communications is emerging in some scenarios. As an alternative to satellite communications, more ...

    • Variation of Ionospheric Narrowband and Wideband Performance for a 12,760 km Transequatorial Link and Its Dependence on Solar and Ionospheric Activity 

      Alsina Pagès, Rosa Maria; Altadill Felip, David; Hervás García, Marcos; Blanch Llosa, Estefania; Segarra, Antoni; González Sans, Xavier (Remote Sensing, 2020, Vol.12 no 17, 2020-08)
      The ionosphere provides a channel that is able to propagate electromagnetic waves for long-haul communications, allowing Non-Line-Of-Sight (NLOS) radio communications in the high-frequency band (HF). ...