Browsing Articles publicats en revistes by Author "Pijoan Vidal, Joan Lluís"
Now showing items 1-17 of 17
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A comprehensive sounding of the ionospheric HF radio link from Antarctica to Spain
Ads, Ahmed Gamal; Bergadà Caramés, Pau; Vilella Parra, Carles; Regué, Joan Ramon; Pijoan Vidal, Joan Lluís; Bardají Benach, Raúl; Mauricio Ferré, Juan (Radio Science, 2013. Vol.48, 1, Gener - Febrer, 2013-01)Since 2003, our group has been investigating the performance of different transmission techniques for low-power low-interference High Frequency (HF) ionospheric communication systems. Specifically, we ... -
An Antarctica‐to‐Spain HF ionospheric radio link: Sounding results
Vilella Parra, Carles; Miralles Esteban, David; Pijoan Vidal, Joan Lluís (Radio Science, 2008, Vol.43 ,Nº4 (Agost), 2008-08)Our research group in Electromagnetism and Communications is involved in a project dealing with the channel characterization of an ionospheric radio link from the Spanish Antarctic Base (62.6°S, 60.4°W) ... -
An example of operation for a partly manned Antarctic geomagnetic observatory and the development of a radio link for data transmission
Torta Margalef, Joan Miquel; Marsal Vinadé, Santiago; Riddick, John C.; Vilella Parra, Carles; Altadill Felip, David; Blanch Llosa, Estefania; Cid, Oscar; Curto, Joan J.; De Santis, Angelo; Gaya-Piqué, Luis R.; Mauricio Ferré, Juan; Pijoan Vidal, Joan Lluís; Solé, Germán J.; Ugalde, Arantza (Annals of Geophysics, 2009. Vol. 52, 1 (Febrer), 2009-02)The experience acquired from more than ten years of operation of an Antarctic geomagnetic observatory is described along with the development of data transmission facilities. The observatory was deployed ... -
Analysis of the Ordinary and Extraordinary Ionospheric Modes for NVIS Digital Communications Channels
Malé Carbonell, Jordi; Porte Jiménez, Joaquim; González Fontán, Tomás; Masó Llinàs, Josep Maria; Pijoan Vidal, Joan Lluís; Badia Folguera, David (Sensors, 2021, 21 (6), 2021-03)Sensor networks have become more popular in recent years, now featuring plenty of optionsand capabilities. Notwithstanding this, remote locations present many difficulties for their studyand monitoring. ... -
Contiguous Frequency-Time Resource Allocation and Scheduling for Wireless OFDMA Systems with QoS Support
Gutiérrez González, Ismael; Bader, Faouzi; Aquilué de Pedro, Ricard; Pijoan Vidal, Joan Lluís (EURASIP Journal on Wireless Communications and Networking, 2009, 2009-02)The orthogonal frequency divisionmultiple access (OFDMA) scheme has been selected as a potential candidate formany emerging broadband wireless access standards. In this paper, a new joint scheduling and ... -
Contiguous Frequency-Time Resource Allocation andScheduling for Wireless OFDMA Systems with QoS Support
Gutiérrez González, Ismael; Aquilué de Pedro, Ricard; Pijoan Vidal, Joan Lluís; Bader, Faouzi (EURASIP Journal on Wireless Communications and Networking, 2009., 2009-04)The orthogonal frequency division multiple access (OFDMA) scheme has been selected as a potential candidate for many emerging broadband wireless access standards. In this paper, a new joint scheduling ... -
Digital Transmission Techniques for a Long Haul HF Link: DS-SS vs. OFDM
Bergadà Caramés, Pau; Alsina Pagès, Rosa Maria; Pijoan Vidal, Joan Lluís; Salvador Marín, Martí; Regué, Joan Ramon; Badia Folguera, David; Graells Castellà, Simó (Radio Science. 2014, Vol.49, No.7 (Juliol), 2014-06)This paper presents two digital transmission techniques for long haul ionospheric links. Since2003 we have studied the HF link between the Antarctic Spanish Base, Juan Carlos I, and Spain; and wehave ... -
Fractal Antennas: An Historical Perspective
Anguera Pros, Jaume; Andújar Linares, Aurora; Jayasinghe, Jeevani; Chakravarthy, V.S.S.S.; Chowdary, P.S.R.; Pijoan Vidal, Joan Lluís; Ali, Tanweer; Cattani, Carlo (Fractal and Fractional, 2020, Vol. 4, No 1, 2020-01)Fractal geometry has been proven to be useful in several disciplines. In the field of antennaengineering, fractal geometry is useful to design small and multiband antenna and arrays, andhigh-directive ... -
Heterogeneous wireless IoT architecture for natural disaster monitorization
Porté Jiménez, Joaquim; Briones Delgado, Alan; Masó Llinàs, Josep M.; Parés Morlans, Carlota; Zaballos Diego, Agustín; Pijoan Vidal, Joan Lluís (EURASIP Journal on Wireless Communications and Networking, 2020, Art. 184, 2020-09)A heterogeneous sensor network offers an extremely effective means of communicating with the international community, first responders, and humanitarian assistance agencies as long as affected populations ... -
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 ... -
Narrowband and Wideband Channel Sounding of an Antarctica to Spain Ionospheric Radio Link
Hervás García, Marcos; Alsina Pagès, Rosa Maria; Orga Vidal, Ferran; Altadill Felip, David; Pijoan Vidal, Joan Lluís; Badia Folguera, David (Remote Sensing. 2015, Vol.7, 2015-09)La Salle and Ebro Observatory have been involved in remote sensing projects in Antarctica for the last 11 years (approximately one solar cycle). The Ebro Observatory has been monitoring and analyzing ... -
NVIS Multicarrier Modulations for Remote-Sensor Applications
Masó Llinàs, Josep M.; Gonzalez Fontan, Tomas; Malé Carbonell, Jordi; Porté Jiménez, Joaquim; Pijoan Vidal, Joan Lluís; Badia Folguera, David (Sensors, 2020, Vol. 20, No. 21, 2020-10)The number of Internet of Things (IoT) devices has experienced a large growth during the last decade, as well as the data volume gathered from remote sensors. Satellites are still a suitable communication ... -
Physical Layer Definition for a Long-Haul HF Antarctica to Spain Radio Link
Alsina Pagès, Rosa Maria; Hervás García, Marcos; Orga Vidal, Ferran; Pijoan Vidal, Joan Lluís; Badia Folguera, David; Altadill Felip, David (Remote Sensing. 2016. Vol.8 No.5 (Maig), 2016-05)La Salle and the Observatori de l’Ebre (OE) have been involved in a remote sensing project in Antarctica for the last 11 years. The OE has been monitoring the geomagnetic activity for more than twenty ... -
Remote Geophysical Observatory in Antarctica with HF data transmission: a Review
Pijoan Vidal, Joan Lluís; Altadill Felip, David; Torta Margalef, Joan Miquel; Alsina Pagès, Rosa Maria; Marsal Vinadé, Santiago; Badia Folguera, David (Remote Sensing. 2014, Vol.6 (Juliol), 2014-07)The geophysical observatory in the Antarctic Spanish Station Juan Carlos I (ASJI) in Livingston Island has been monitoring the magnetic field in the Antarctic region for more than fifteen years. In 2004, ... -
Sensing System for Remote Areas in Antarctica
Porté Jiménez, Joaquim; Masó Llinàs, Josep M.; Pijoan Vidal, Joan Lluís; Badia Folguera, David (Radio Science, 2020, Vol.55 No 3, 2020-02)Every year, the number of Internet of Things devices is growing exponentially. The current Internet of Things technology to support the connectivity of such a huge number of devices is limited by the ... -
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 ... -
Vertical and Oblique ionospheric soundings over the long haul HF link between Antarctica and Spain
Ads, Ahmed Gamal; Bergadà Caramés, Pau; Regué, Joan Ramon; Alsina Pagès, Rosa Maria; Pijoan Vidal, Joan Lluís; Altadill Felip, David; Badia Folguera, David; Graells Castellà, Simó (Radio Science. 2015, Vol. 50, No.9 (Setembre), 2015-09)This paper presents a comparative study between the oblique sounding results, theInternational Telecommunication Union Rec533 HF prediction model, and the vertical sounding results of atransequatorial ...