Search Results - "Pijoan, J L"

An Antarctica-to-Spain HF ionospheric radio link: Sounding results by Vilella, C., Miralles, D., Pijoan, J. L.

“…Our research group in Electromagnetism and Communications is involved in a project dealing with the channel characterization of an ionospheric radio link from…”
Get full text

Vertical and oblique ionospheric soundings over a very long multihop HF radio link from polar to midlatitudes: Results and relationships by Vilella, C., Miralles, D., Altadill, D., Acosta, F., Solé, J. G., Torta, J. M., Pijoan, J. L.

“…A vertical incidence sounder (VIS) was installed at the Spanish Antarctic Base (62.7°S, 299.6°E) during the Antarctic summer survey 2004–2005. In addition, an…”
Get full text

Digital transmission techniques for a long haul HF link: DSSS versus OFDM by Bergadà, P., Alsina-Pagès, R. M., Pijoan, J. L., Salvador, M., Regué, J. R., Badia, D., Graells, S.

“…This paper presents two digital transmission techniques for long haul ionospheric links. Since 2003 we have studied the HF link between the Antarctic Spanish…”
Get full text

A comprehensive sounding of the ionospheric HF radio link from Antarctica to Spain by Ads, A. G., Bergadà, P., Vilella, C., Regué, J. R., Pijoan, J. L., Bardají, R., Mauricio, J.

“…Since 2003, our group has been investigating the performance of different transmission techniques for low‐power low‐interference High Frequency (HF)…”
Get full text

Vertical and oblique ionospheric soundings over the long haul HF link between Antarctica and Spain by Ads, A. G., Bergadà, P., Regué, J. R., Alsina-Pagès, R. M., Pijoan, J. L., Altadill, D., Badia, D., Graells, S.

“…This paper presents a comparative study between the oblique sounding results, the International Telecommunication Union Rec533 HF prediction model, and the…”
Get full text

Advanced modulation schemes for an Antarctic Long Haul HF Link: Performance comparison between SC-FDE, OFDMA and SC-FDMA in a hostile environment by Hervás, M., Alsina-Pagès, R. M., Pijoan, J. L., Salvador, M., Badia, D.

“…This paper presents the comparison of the BER performance between SC-FDE, orthogonal frequency division multiplexing (OFDMA) and single-carrier frequency…”
Get full text

Contiguous Frequency-Time Resource Allocation and Scheduling for Wireless OFDMA Systems with QoS Support by Gutiérrez, I, Bader, F, Aquilué, R, Pijoan, J L

“…The orthogonal frequency division multiple access (OFDMA) scheme has been selected as a potential candidate for many emerging broadband wireless access…”
Get full text

On Cubic Metric Reduction in OFDM Systems by Tone Reservation by Deumal, M, Behravan, A, Pijoan, J L

“…One of the major drawbacks of multicarrier modulation is the large envelope fluctuations which either requires an inefficient use of high power amplifiers…”
Get full text

Scattering Parameters-Based Channel Characterization and Modeling for Underground Medium-Voltage Power-Line Communications by Aquilue, R., Ribo, M., Regue, J.R., Pijoan, J.L., Sanchez, G.

“…Power-line communications (PLC) technologies rely on the power grid for data transmission. Since the communications channel is already deployed, this…”
Get full text

High-Voltage Multicarrier Spread-Spectrum System Field Test by Aquilue, R., Gutierrez, I., Pijoan, J.L., Sanchez, G.

“…High-voltage (HV) power lines have been used as a communications medium since the 1920s. Those point-to-point links were typically based on single-sideband…”
Get full text

Contiguous Frequency-Time Resource Allocation and Scheduling for Wireless OFDMA Systems with QoS Support by Gutiérrez, I, Bader, F., Aquilué, R., Pijoan, J. L.

“…The orthogonal frequency division multiple access (OFDMA) scheme has been selected as a potential candidate for many emerging broadband wireless access…”
Get full text

Mixed TUSC and Band AMC Permutation Zone in OFDMA Systems with Limited Feedback by Gutierrez, I., Pijoan, J.L., Bader, F.

“…In this paper a new permutation zone which combines adjacent and distributed subcarrier permutation is proposed for Orthogonal Frequency Division Multiple…”
Get full text

Multicarrier Symbol Design for HF Transmissions from the Antarctica Based on Real Channel Measurements by Aquilue, R., Bergada, P., Deumal, M., Pijoan, J.L.

“…Last fifteen years improvements in HF digital systems have made ionospheric communications a true alternative to low bit rate, long distance links, especially…”
Get full text

New prioritization function for user scheduling in OFDMA Systems by Gutierrez, I., Bader, F., Pijoan, J.L.

“…In this paper a new prioritization function for Orthogonal Frequency Division Multiple Access (OFDMA) is proposed where the resource allocation problem is…”
Get full text

Time interleaving study for an OFDM long-haul HF radio link by Bergada, P, Deumal, M, Alsina, R.M, Pijoan, J.L

“…Communication with remote places is a challenge that in most cases is solved by means of satellites. However, for low-rate data transmission from remote…”
Get full text

Subchannel power allocation and rate adaptation for a MC-CDMA system satisfying mixed QoS requirements by Gutierrez, I., Bader, F., Pijoan, J.L.

“…In this paper a power and rate adaptation algorithm for a MC-CDMA system with different quality of service (QoS) requirements is proposed. We consider the…”
Get full text

DSP-based ionospheric radiolink using DS-CDMA and on-line channel estimation by Pijoan, J L, Socor, J C, Moran, J A, Tarrés Ruiz, Francisco

“…In this paper, a new blind multiuser detection algorithm is presented. It can both cancel multiuser interference and estimate the multipath channel response in…”
Get full text

New receivers for DS-SS in time variant multipath channels based on the PN alignment concept by Socoro, J.C., Pijoan, J.L., Moran, J.A., Tarres, F.

“…We present new combined blind equalization and detection schemes for a DS-SS system. The new proposed algorithms improve the bit error rate compared to…”
Get full text

Partially clipping (PC) method for the peak-to-average power ratio (PAPR) reduction in OFDM by Deumal, M., Vilella, C., Pijoan, J.L., Bergada, P.

“…OFDM (orthogonal frequency division multiplexing) has emerged as one of the best modulations for broadband mobile communications. Despite its robustness…”
Get full text

DSP-based ionospheric radio-link using DS-CDMA and on-line channel estimation by Pijoan, J.L., Socoro, J.C., Moran, J.A., Tarres, F.

“…In this paper, a new blind multiuser detection algorithm is presented. It can both cancel multiuser interference and estimate the multipath channel response in…”
Get full text