Exploració per autor "Riba Sagarra, Jaume"
Ara es mostren els items 21-40 de 77
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Comunicaciones II : ejercicios resueltos
Cabrera-Bean, Margarita; Rodríguez Fonollosa, Javier; Fernández Rubio, Juan Antonio; Riba Sagarra, Jaume (Edicions UPC, 2005)
Llibre
Accés restringit a la comunitat UPCEste material constituye una recopilación de problemas de examen, resueltos por los profesores de la asignatura Comunicaciones 2, impartida en el segundo curso de los estudios de Ingeniería Técnica Superior de Telecomunicaciones ... -
Conditional maximum likelihood frequency estimation for staggered modulations
Riba Sagarra, Jaume; Vázquez Grau, Gregorio (1998)
Text en actes de congrés
Accés obertThe use of spectrally efficient continuous phase modulations for mobile communications may lead to a serious performance degradation of the classical frequency error detectors (FEDs) due to the presence of self-noise. This ... -
Conditional maximum likelihood timing recovery
Riba Sagarra, Jaume; Vázquez Grau, Gregorio (Institute of Electrical and Electronics Engineers (IEEE), 1999)
Text en actes de congrés
Accés obertThe conditional maximum likelihood (CML) principle, well known in the context of sensor array processing, is applied to the problem of timing recovery. A new self-noise free CML-based timing error detector is derived. ... -
Conditional maximum likelihood timing recovery: estimators and bounds
Riba Sagarra, Jaume; Sala Álvarez, José; Vázquez Grau, Gregorio (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-04-30)
Article
Accés obertThis paper is concerned with the derivation of new estimators and performance bounds for the problem of timing estimation of (linearly) digitally modulated signals. The conditional maximum likelihood (CML) method is adopted, ... -
Context-aware lossless and lossy compression of radio frequency signals
Martí Espelt, Aniol; Portell de Mora, Jordi; Riba Sagarra, Jaume; Mas Casals, Orestes Miquel (Multidisciplinary Digital Publishing Institute (MDPI), 2023-03-28)
Article
Accés obertWe propose an algorithm based on linear prediction that can perform both the lossless and near-lossless compression of RF signals. The proposed algorithm is coupled with two signal detection methods to determine the presence ... -
Cramer-Rao bounds for SNR estimation of oversampled linearly modulated signals
López Valcarce, Roberto; Villares Piera, Nemesio Javier; Riba Sagarra, Jaume; Gappmair, Wilfried; Mosquera Nartallo, Carlos (2015-04-01)
Article
Accés obertMost signal-to-noise ratio (SNR) estimators use the receiver matched filter output sampled at the symbol rate, an approach which does not preserve all information in the analog waveform due to aliasing. Thus, it is relevant ... -
D1. Estudio de códigos PN para mejorar el ensanchado y la eficiencia espectral del sistema CDMA síncrono y asíncrono
Lamarca Orozco, M. Meritxell; Rey Micolau, Francesc; Riba Sagarra, Jaume; Sala Álvarez, José; Vázquez Grau, Gregorio; Villares Piera, Nemesio Javier (2008-11-10)
Report de recerca
Accés restringit per acord de confidencialitat -
D2. Estructuras de detector multiusuario para CDMA síncrono y asíncrono
Lamarca Orozco, M. Meritxell; Rey Micolau, Francesc; Riba Sagarra, Jaume; Sala Álvarez, José; Vázquez Grau, Gregorio; Villares Piera, Nemesio Javier (2008-11-10)
Report de recerca
Accés restringit per acord de confidencialitat -
D3. Sincronización robusta de frecuencia y fase para M-PSK sobre CDMA
Lamarca Orozco, M. Meritxell; Rey Micolau, Francesc; Riba Sagarra, Jaume; Sala Álvarez, José; Vázquez Grau, Gregorio; Villares Piera, Nemesio Javier (2008-11-10)
Report de recerca
Accés restringit per acord de confidencialitat -
DA-GLRT burst detection and synchronization based on a chirp-like preamble
Rodríguez, E; Lamarca Orozco, M. Meritxell; López Salcedo, José Antonio; Rey Micolau, Francesc; Riba Sagarra, Jaume; Sala Álvarez, José; Vázquez Grau, Gregorio; Villares Piera, Nemesio Javier; Jalón, A (2008)
Text en actes de congrés
Accés restringit per política de l'editorialA specific preamble for the tasks of signal detection and synchronization in burst digital communications is presented. The preamble resembles a chirp signal used in RADAR applications. Its main benefit is that it allows ... -
Data driven joint sensor fusion and regression based on geometric mean squared error
López Molina, Carlos Alejandro; Riba Sagarra, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2023)
Comunicació de congrés
Accés obertThis paper explores the problem of estimating a temporal series measured from multiple independent sensors with unequal and stationary measurement errors with unknown variances. By formulating the data fusion problem as a ... -
Descripciones tiempo-frecuencia en la recuperacion conjunta de param
Riba Sagarra, Jaume; Vázquez Grau, Gregorio (Universidad de Málaga, 1992)
Text en actes de congrés
Accés obert -
Dimension spreading for coherent opportunistic communications
Borràs Pino, Jordi; Font Segura, Josep; Riba Sagarra, Jaume; Vázquez Grau, Gregorio (Institute of Electrical and Electronics Engineers (IEEE), 2018)
Text en actes de congrés
Accés obertThe waveform optimization problem for opportunistic communications is addressed, based on sensing the second-order statistics of the existing transmissions. We propose a minimum-norm waveform optimization that exhibits ... -
Entropy-based covariance determinant estimation
Cabrera Estanyol, Ferran de; Riba Sagarra, Jaume; Vázquez Grau, Gregorio (Institute of Electrical and Electronics Engineers (IEEE), 2017)
Comunicació de congrés
Accés obertAn information-theoretic approach is described to estimate the determinant of the covariance matrix of a random vector sequence (a common task in a wide range of estimation and detection problems in signal processing for ... -
Entropy-based non-data-aided SNR estimation
Cabrera Estanyol, Ferran de; Riba Sagarra, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2019)
Comunicació de congrés
Accés obertA non-data-aided SNR estimation of a communication channel is addressed in this paper. The main contribution relies on the relationship between an entropy measure of a given constellation and the link quality. The main ... -
Estimation of information in parallel Gaussian channels via model order selection
López Molina, Carlos Alejandro; Cabrera Estanyol, Ferran de; Riba Sagarra, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2020)
Comunicació de congrés
Accés obertWe study the problem of estimating the overall mutual information in M independent parallel discrete-time memory-less Gaussian channels from N independent data sample pairs per channel (inputs and outputs). We focus on the ... -
Examen Final
Nájar Martón, Montserrat; Pagès Zamora, Alba Maria; Riba Sagarra, Jaume (Universitat Politècnica de Catalunya, 2019-01-21)
Examen
Accés restringit a la comunitat UPC -
Examen Final
Pascual Iserte, Antonio; Pérez Neira, Ana Isabel; Riba Sagarra, Jaume (Universitat Politècnica de Catalunya, 2021-06-17)
Examen
Accés restringit a la comunitat UPC -
Examen Final
Cabrera-Bean, Margarita; Marqués Acosta, Fernando; Riba Sagarra, Jaume; Vidal Manzano, José (Universitat Politècnica de Catalunya, 2018-07-17)
Examen
Accés restringit a la comunitat UPC -
Feasibility of precise navigation in high and low latitude regions under scintillation conditions
Juan Zornoza, José Miguel; Sanz Subirana, Jaume; González Casado, Guillermo; Rovira Garcia, Adrià; Camps Carmona, Adriano José; Riba Sagarra, Jaume; Barbosa, José; Blanch Llosa, Estefania; Altadill, David; Orús Pérez, Raul (2018-02-06)
Article
Accés obertScintillation is one of the most challenging problems in Global Navigation Satellite Systems (GNSS) navigation. This phenomenon appears when the radio signal passes through ionospheric irregularities. These irregularities ...