Exploració per autor "Riba Sagarra, Jaume"
Ara es mostren els items 21-40 de 77
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Comunicaciones II : ejercicios resueltos
(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
(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
(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
(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
(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
(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
(2008-11-10)
Report de recerca
Accés restringit per acord de confidencialitat -
D2. Estructuras de detector multiusuario para CDMA síncrono y asíncrono
(2008-11-10)
Report de recerca
Accés restringit per acord de confidencialitat -
D3. Sincronización robusta de frecuencia y fase para M-PSK sobre CDMA
(2008-11-10)
Report de recerca
Accés restringit per acord de confidencialitat -
DA-GLRT burst detection and synchronization based on a chirp-like preamble
(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
(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
(Universidad de Málaga, 1992)
Text en actes de congrés
Accés obert -
Dimension spreading for coherent opportunistic communications
(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
(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
(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
(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
(Universitat Politècnica de Catalunya, 2019-01-21)
Examen
Accés restringit a la comunitat UPC -
Examen Final
(Universitat Politècnica de Catalunya, 2021-06-17)
Examen
Accés restringit a la comunitat UPC -
Examen Final
(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
(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 ...
