Exploració per autor "Sala Álvarez, José"
Ara es mostren els items 1-20 de 108
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A cost function for the equalization of constant amplitude signals based on statistical reference
Sala Álvarez, José (1996)
Text en actes de congrés
Accés obertThe equalization of constant amplitude signals is considered in the scope of this paper. A criterion based on the probability density function (pdf) of the signal of interest is proposed. The objective is to derive a ... -
A distributed arithmetics architecture for quantization SNR improvement based on LUT recoding
Rubio Fernández, José; Sala Álvarez, José (Servicio de Publicaciones Universidad de Vigo, 1999)
Text en actes de congrés
Accés obert -
A fast OFDM-CDMA user demultiplexing architecture
Marti Puig, Pere; Sala Álvarez, José (Institute of Electrical and Electronics Engineers (IEEE), 2000)
Text en actes de congrés
Accés obertA fast algorithm based on a butterfly structure is presented that demultiplexes the symbols of a particular type of MC-MA (multi-carrier multiple-access) modulation previously proposed for indoor radio communications. A ... -
A rain and scintillation Ka-band channel simulator
Rodríguez, E; Sala Álvarez, José; Lamarca Orozco, M. Meritxell; López, J. A.; Rey Micolau, Francesc; Riba Sagarra, Jaume; Vázquez Grau, Gregorio; Villares Piera, Nemesio Javier; Jalón, A (ESA, 2008)
Text en actes de congrés
Accés obertThis paper describes the implementation of a Ka-band satellite channel simulator with emphasis on the synthesis of scintillation processes. The problem becomes one of generating a given probability density function, ... -
A statistical reference criterion for adaptive filtering
Sala Álvarez, José; Vázquez Grau, Gregorio (Institute of Electrical and Electronics Engineers (IEEE), 1996)
Text en actes de congrés
Accés obertA cost function for adaptive filtering is proposed, based on the statistical reference criterion. The purpose of this criterion is to enforce a given probability density function at the output of a system. The only ... -
A statistical reference criterion for adaptive filtering
Sala Álvarez, José; Vázquez Grau, Gregorio (Institute of Electrical and Electronics Engineers (IEEE), 1996)
Text en actes de congrés
Accés obertA cost function for adaptive filtering is proposed, based on the statistical reference criterion. The purpose of this criterion is to enforce a given probability density function at the output of a system. The only ... -
Adaptive blind equalization and demodulation without channel and signal parameter extraction
Sala Álvarez, José; Vázquez Grau, Gregorio (1994)
Text en actes de congrés
Accés obertThe problem of filtering a source of known statistics in noise and/or interference of unknown statistics is addressed in this paper. In a general framework, the optimum estimation (detection) of the desired signal requires ... -
ADC Quantization Requirements
Riba Sagarra, Jaume; Lamarca Orozco, M. Meritxell; Rey Micolau, Francesc; Sala Álvarez, José; Vázquez Grau, Gregorio; Villares Piera, Nemesio Javier (2000-06)
Report de recerca
Accés obertIn this document, we analyze the impact of the quantization at the input of the demultiplexer. The required number of bits of the Analog-to-Digital-Converter (ADC) is obtained, along with the corresponding quantization losses. -
ANTARES Project (Bridging Phase). Payload carrier synchronization : algorithms and simulations
Font Segura, Josep; Matas Navarro, David; Ramírez Javega, Francisco; Rey Micolau, Francesc; Riba Sagarra, Jaume; Sala Álvarez, José; Vázquez Grau, Gregorio; Villares Piera, Nemesio Javier (2011-11-23)
Report de recerca
Accés restringit per acord de confidencialitatInforme final Bridging Phase. Versió 3.2 -
ANTARES Project (Phase B). Multiple acces scheme definition. Diverse trade-offs analysis for TDMA and CDMA
Villares Piera, Nemesio Javier; Font Segura, Josep; Matas Navarro, David; Ramírez Javega, Francisco; Lamarca Orozco, M. Meritxell; Rey Micolau, Francesc; Riba Sagarra, Jaume; Sala Álvarez, José; Vázquez Grau, Gregorio (2010-03-01)
Report de recerca
Accés restringit per acord de confidencialitat -
ANTARES Project (Phase B). Multiple acces scheme definition. Spectral efficiency analysis of the MAC techniques considered for the Antares forward and return links
Villares Piera, Nemesio Javier; Font Segura, Josep; Matas Navarro, David; Ramírez Javega, Francisco; Lamarca Orozco, M. Meritxell; Rey Micolau, Francesc; Riba Sagarra, Jaume; Sala Álvarez, José; Vázquez Grau, Gregorio (2010-07-01)
Report de recerca
Accés restringit per acord de confidencialitat -
ANTARES Project (Phase B). Multiple acces scheme definition. Successive interference cancellation for A-CDMA
Villares Piera, Nemesio Javier; Font Segura, Josep; Matas Navarro, David; Ramírez Javega, Francisco; Lamarca Orozco, M. Meritxell; Rey Micolau, Francesc; Riba Sagarra, Jaume; Sala Álvarez, José; Vázquez Grau, Gregorio (2010-05-01)
Report de recerca
Accés restringit per acord de confidencialitat -
ANTARES Project (Phase B). Multiple access scheme definition. Impact of the aeronautical channel on the MAC techniques considered for the Antares forward and return links
Villares Piera, Nemesio Javier; Font Segura, Josep; Lamarca Orozco, M. Meritxell; Matas Navarro, David; Ramírez Javega, Francisco; Rey Micolau, Francesc; Riba Sagarra, Jaume; Sala Álvarez, José; Vázquez Grau, Gregorio (2010-03-01)
Report de recerca
Accés restringit per acord de confidencialitat -
ANTARES Project (Phase B). Physical layer definition. Equalization detailed design
Villares Piera, Nemesio Javier; Font Segura, Josep; Matas Navarro, David; Ramírez Javega, Francisco; Lamarca Orozco, M. Meritxell; Rey Micolau, Francesc; Riba Sagarra, Jaume; Sala Álvarez, José; Vázquez Grau, Gregorio (2010-08-01)
Report de recerca
Accés restringit per acord de confidencialitat -
ANTARES Project (Phase B). Physical layer definition. Payload carrier synchronization for the Antares TDMA return link
Villares Piera, Nemesio Javier; Font Segura, Josep; Matas Navarro, David; Ramírez Javega, Francisco; Lamarca Orozco, M. Meritxell; Rey Micolau, Francesc; Riba Sagarra, Jaume; Sala Álvarez, José; Vázquez Grau, Gregorio (2010-08-01)
Report de recerca
Accés restringit per acord de confidencialitat -
APLICACIONS A LA CREACIO DE CONTINGUTS MULTIMEDIA (Examen 1r Quadr.)
Sala Álvarez, José (Universitat Politècnica de Catalunya, 2006-01-12)
Examen
Accés restringit a la comunitat UPC -
Apunts de comunicacions analògiques i digitals
Sala Álvarez, José (Universitat Politècnica de Catalunya, 2010)
Apunts
Accés obert -
Asymptotic and finite user PER analysis of successive interference cancellation in DS-CDMA
Sala Álvarez, José; Villares Piera, Nemesio Javier; Rey Micolau, Francesc (2011-11)
Article
Accés obertAn expression is derived for the average Packet Error Rate (PER) of a Successive Interference Canceller (SIC) for DS-CDMA when the number of users asymptotically tends to infinity. The asymptotic probability density function ... -
Asymptotic performance analysis of successive interference cancellation with dynamic user-decoding order
Molina Oliveras, Francesc; Sala Álvarez, José (2020-09-01)
Article
Accés obertWe address the evaluation of dynamic (estimation-based) user-decoding order in successive interference cancellation (SIC) in a proof-of-concept multiple access satellite setting in which many code-division multiple access ... -
Asymptotically optimum energy profile for successive interference cancellation in DS-CDMA under a power unbalance constraint
Sala Álvarez, José; Rey Micolau, Francesc; Villares Piera, Nemesio Javier (2012-02)
Article
Accés obertA new Ordinary Differential Equation (ODE) governing the SNIR evolution of a Successive Interference Canceller (SIC) for DS-CDMA is derived when the number of users tends to infinity and all users share the same channel ...