Exploració per autor "Sala Álvarez, José"
Ara es mostren els items 76-95 de 109
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Feasibility study for a spacecraft navigation system relying on pulsar timing information
Sala Álvarez, José; Urruela Planas, Andreu; Villares Piera, Nemesio Javier; Estalella, R; Paredes, J M (2004-06)
Report de recerca
Accés obertEstudi de fiabilitat per un sistema de navegacio d'espai profund basat en referencies de radio-estrelles pulsants (pulsar). -
Filtrado de kallman para la recuperacion de portadora a partir de estimaciones previas
Sala Álvarez, José; Vázquez Grau, Gregorio; Lagunas Hernandez, Miguel A. (1991)
Text en actes de congrés
Accés obertTwo approaches to carrier recovery in a digital communications system under non-stationary conditions are presented for low and high signaling rates with respect to the maximum allowable Doppler frequency. A Kalman-based ... -
Floating Doppler Wind Lidar motion simulator for horizontal wind speed measurement error assessment
Salcedo Bosch, Andreu; Farré Guarné, Joan; Sala Álvarez, José; Villares Piera, Nemesio Javier; Tanamachi, Robin; Rocadenbosch Burillo, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2021)
Text en actes de congrés
Accés obertThis study presents a wind retrieval simulator of a floating Doppler Wind Lidar (DWL) with 6 Degrees of Freedom (DoF) motion. The simulator considers a continuous-wave conical-scanning floating DWL which retrieves the wind ... -
Global beamforming and demodulation for linearly modulated signals
Sala Álvarez, José; Vázquez Grau, Gregorio (Institute of Electrical and Electronics Engineers (IEEE), 1994)
Text en actes de congrés
Accés obert -
HISPANET: a digital television/multimedia payload
Sala Álvarez, José; Sergio, Calvo; Pagès Zamora, Alba Maria; Vázquez Grau, Gregorio; Riba Sagarra, Jaume (European Spatial Agengy (ESA), 1998)
Text en actes de congrés
Accés obert -
Informe final. Demostrador de serveis Galileo per Catalunya
Villares Piera, Nemesio Javier; Calvo Muntaner, Eduard; Carlavilla Márquez, Màxim; Lamarca Orozco, M. Meritxell; López Salcedo, José Antonio; Rey Micolau, Francesc; Riba Sagarra, Jaume; Sala Álvarez, José; Vázquez Grau, Gregorio (2007-09-25)
Report de recerca
Accés restringit per acord de confidencialitat -
Informe Número 1: Projecte SETRAM
Sala Álvarez, José; Rey Micolau, Francesc; Riba Sagarra, Jaume; Villares Piera, Nemesio Javier; Lamarca Orozco, M. Meritxell; Vázquez Grau, Gregorio (2008-10-01)
Report de recerca
Accés restringit per acord de confidencialitatL’objectiu del projecte SETRAM és l’especificació d’algorismes de classificació no supervisada d’informació de mobilitat d’usuaris a partir de dades de posició proporcionades per la xarxa mòbil i/o satèl.lit. En el projecte ... -
Interference power recycling in two-scale ad hoc wireless networks
Villares Piera, Nemesio Javier; Sala Álvarez, José; Rey Micolau, Francesc (Institute of Electrical and Electronics Engineers (IEEE), 2014)
Text en actes de congrés
Accés obertA two-scale ad hoc wireless network is envisaged in which the interference power generated in long-range connections is recycled by the surrounding wireless nodes in order to support their own short-range communications. ... -
Joint energy and rate allocation for successive interference cancellation in the finite blocklength regime
Molina Oliveras, Francesc; Sala Álvarez, José; Villares Piera, Nemesio Javier; Rey Micolau, Francesc (Institute of Electrical and Electronics Engineers (IEEE), 2018)
Comunicació de congrés
Accés obertThis work addresses the optimization of the network spectral efficiency (SE) under successive interference cancellation (SIC) at a given blocklength n. We adopt a proof-of-concept satellite scenario where network users can ... -
LAVICAD: LAboratori VIrtual de Comunicacions Analògiques i Digitals
Cabrera-Bean, Margarita; Giró Nieto, Xavier; Rey Micolau, Francesc; Gasull Llampallas, Antoni; Casas, Josep; Villares Piera, Nemesio Javier; Fernández Rubio, Juan Antonio; Sala Álvarez, José; Espinosa Fricke, Pedro; Fernández, Carlos Marcos; Cortes, Silvia; Muntanyola, Mireia; Farré, Miquel Angel (2009-02-12T09:27:53Z)
Comunicació de congrés / Text en actes de congrés
Accés obertMitjançant el present ajut s’ha ampliat l’aplicació en xarxa LAVICAD (LAboratori VIrtual de COmunicacions Analògiques i Digitals) que s’ofereix de forma integrada dins de la plataforma d’e-learning COM@WEB. LAVICAD és ... -
Low-rank data matrix recovery with missing values and faulty sensors
Lopez Valcarce, Roberto; Sala Álvarez, José (2019)
Comunicació de congrés
Accés obertIn practice, data gathered by wireless sensor networks often belongs in a low-dimensional subspace, but it can present missing as well as corrupted values due to sensor malfunctioning and/or malicious attacks. We study the ... -
Minimum PER user-energy profile for massive SIC receivers under an average energy constraint
Sala Álvarez, José; Rey Micolau, Francesc; Villares Piera, Nemesio Javier; Molina Oliveras, Francesc (Institute of Electrical and Electronics Engineers (IEEE), 2017)
Comunicació de congrés
Accés obertInterference may pose a severe limitation to massive wireless multiple access unless the central receiver is endowed with strong multipacket reception capabilities. In that respect, Interference Cancellation (IC) has been ... -
Multiantenna GLR detection of a gaussian signal in spatially uncorrelated noise
Sala Álvarez, José (2011)
Text en actes de congrés
Accés restringit per política de l'editorialThe exact all-SNR Generalized Log-likelihood Ratio Test (GLRT) of a Gaussian rank-one signal impinging on an 𝑀- antenna receiver in unknown spatially uncorrelated white noise is derived and compared with some previous ... -
Multiantenna GLR detection of rank-one signals with known power spectral shape under spatially uncorrelated noise
Sala Álvarez, José; Vázquez Vilar, Gonzalo; López Valcarce, Roberto; Sedighi, Saeid; Taherpour, Abbas (2016-12-01)
Article
Accés obertWe establish the generalized likelihood ratio (GLR) test for a Gaussian signal of known power spectral shape and unknown rank-one spatial signature in additive white Gaussian noise with an unknown diagonal spatial ... -
Multiantenna GLR detection of rank-one signals with known power spectrum in white noise with unknown spatial correlation
Sala Álvarez, José; Vázquez Vilar, Gonzalo; López Valcarce, Roberto (2012-06)
Article
Accés restringit per política de l'editorialMultiple-antenna detection of a Gaussian signal with spatial rank one in temporally white Gaussian noise with arbitrary and unknown spatial covariance is considered. This is motivated by spectrum sensing problems in the ... -
Multiantenna spectrum sensing exploiting spectral a priori information
Vázquez Vilar, Gonzalo; López Valcarce, Roberto; Sala Álvarez, José (2011-12)
Article
Accés restringit per política de l'editorialDynamic Spectrum Access (DSA) is receiving considerable interest as a means to improve spectral usage in licensed bands. In order to avoid interference to licensed users, spectrum sensing has emerged as an enabling technology ... -
Multiantenna spectrum sensing for cognitive radio: overcoming noise uncertainty
López Valcarce, Roberto; Vázquez Vilar, Gonzalo; Sala Álvarez, José (2010)
Text en actes de congrés
Accés obertSpectrum sensing is a key ingredient of the dynamic spectrum access paradigm, but it needs powerful detectors operating at SNRs well below the decodability levels of primary signals. Noise uncertainty poses a significant ... -
Nota tècnica 1: projecte SETRAM
Sala Álvarez, José; Riba Sagarra, Jaume; Rey Micolau, Francesc; Villares Piera, Nemesio Javier; Vázquez Grau, Gregorio; Lamarca Orozco, M. Meritxell (2008-02-26)
Altres
Accés restringit per acord de confidencialitatUn dels aspectes més crítics per assolir una definició avançada i realista del sistema SETRAM és la identificació de les tecnologies més adequades per a la localització d’usuaris mòbils, des de les ja existents (aplicables ... -
On the performance of Hadamard ratio detector-based spectrum sensing for cognitive radios
Sedighi, Saeid; Taherpour, Abbas; Sala Álvarez, José; Khattab, Tamer (2015-07-15)
Article
Accés obertWe consider the problem of multiantenna spectrum sensing (SS) in cognitive radios (CRs) when the receivers are assumed to be uncalibrated across the antennas. The performance of the Hadamard Ratio Detector (HRD) is analyzed ... -
Optimal power control law for equal-rate DS-CDMA networks governed by a successive soft interference cancellation scheme
Molina Oliveras, Francesc; Sala Álvarez, José; Villares Piera, Nemesio Javier; Rey Micolau, Francesc (Institute of Electrical and Electronics Engineers (IEEE), 2018)
Text en actes de congrés
Accés obertThis paper studies the throughput maximization of a dense multiple access network of low-rate subscribers that share the same practical Forward Error Correction (FEC) code and modulation scheme, and transmit to a central ...