Search Results - "Pijoan, J.L"

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…”
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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…”
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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…”
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Constrained Clipping for Peak Power Reduction of Multicarrier Systems by Tone Reservation by Deumal, Marc, Behravan, Ali, Eriksson, Thomas, Pijoan, Joan Lluis

“…In this paper we introduce a new method to limit the peak factor of a multicarrier signal based on tone reservation. A peak-reducing signal is computed by…”
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Peak Reduction of Multi-Carrier Systems by Controlled Spectral Outgrowth by Deumal, M., Pijoan, J.L., Gutierrez, I., Behravan, A.

“…One of the major drawbacks with multi-carrier (MC) modulations is the large peak-to-average power ratio (PAPR) of the transmitted signal which significantly…”
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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…”
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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…”
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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…”
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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…”
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Transceiver architecture and digital down converter design for a long distance, low power HF ionospheric link by Vilella, C, Bergada, P, Deumal, M, Pijoan, J.L, Aquilue, R

“…This paper describes the digital transceiver design used for an HF ionospheric link between the Spanish Antarctic Base and Spain. First the platform is…”
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An Antarctica to Spain HF link: oblique sounding results by Vilella, C, Socoro, J.C, Pijoan, J.L, Gutierrez, L, Altadill, D

“…Our Research Group in Electromagnetism and Communications is involved in a project dealing with the channel characterization and data transmission from the…”
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A DS-SS signaling based system proposal for low SNR HF digital communications by Deumal, M, Vilella, C, Socoro, J.C, Alsina, R.M, Pijoan, J.L

“…In this paper a DS-SS signaling based physical layer for low SNR links is presented. This technique is able to increase the spectral efficiency by scarcely…”
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Channel estimation for long distance HF communications on OFDM pilot symbols by Aquilue, R, Bergada, P, Gutierrez, I, Pijoan, J.L

“…Although HF communications have mostly been used for voice purposes, since the growing of digital systems, they are becoming a true alternative to satellite…”
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High voltage channel measurements and field test of a low power OFDM system by Aquilue, R., 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…”
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A Low Complexity Multicarrier Proposal for Medium Rate Demanding Automatic Meter Reading Systems by Aquilue, R., Deumal, M., Pijoan, J.L., Corbeira, L.

“…In automatic meter reading (AMR) technology, electrical utilities (EUs) have been exploiting their own infrastructure to bill their customers in an efficient…”
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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…”
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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…”
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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…”
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