Recent Submissions

  • Minimum error entropy estimation under contaminated Gaussian noise 

    López Molina, Carlos Alejandro; Cabrera Estanyol, Ferran de; Riba Sagarra, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2023-10-12)
    Article
    Open Access
    It is shown that Rényi's entropy of a Gaussian mixture with entropic index α∈(1,∞] is upper-bounded by the cluster with minimum variance. This basic idea leads to a clean worst-case formulation of the minimum error entropy ...
  • Subspace leakage in conventional and dimensionally spread null-space communications 

    Borràs Pino, Jordi; Vázquez Grau, Gregorio (2023-10)
    Article
    Open Access
    This letter evaluates the impact of subspace leakage in conventional (single-dimension) and dimensionally spread null-space precoding schemes. This phenomenon arises when the null-space inference procedure lacks precision ...
  • Prediction models using artificial intelligence and longitudinal data from electronic health records: a systematic methodological review 

    Carrasco Ribelles, Lucía Amalia; Llanes Jurado, José; Gallego Moll, Carlos; Cabrera-Bean, Margarita; Monteagudo Zaragoza, Mònica; Violán Fors, Concepción; Zabaleta del Olmo, Edurne (2023-12)
    Article
    Open Access
    Objective: To describe and appraise the use of artificial intelligence (AI) techniques that can cope with longitudinal data from electronic health records (EHRs) to predict health-related outcomes. Methods: This ...
  • Optimizing access demand for mMTC traffic using neural networks 

    Llobet Turró, Martí; Cabrera-Bean, Margarita; Vidal Manzano, José; Agustín de Dios, Adrián (Institute of Electrical and Electronics Engineers (IEEE), 2023-12)
    Article
    Open Access
    Machine-type communications show unique spatial and temporal correlation properties that often lead to bursty access demand profiles. With the expected large-scale deployment of the Internet of Things (IoT), next-generation ...
  • Multiqubit time-varying quantum channels for NISQ-era superconducting quantum processors 

    Etxezarreta Martínez, Josu; Fuentes Ugartemendia, Patricio; Martí i Oliu, Antonio de; García Frias, Javier; Rodríguez Fonollosa, Javier; Crespo Bofill, Pedro M. (American Physical Society, 2023-07)
    Article
    Open Access
    Time-varying quantum channels (TVQCs) have been proposed as a model to include fluctuations of the relaxation (T1) and dephasing times (T2). In previous works, realizations of multiqubit TVQCs have been assumed to be equal ...
  • Contribution of frailty to multimorbidity patterns and trajectories: Longitudinal dynamic cohort study of aging people 

    Carrasco Ribelles, Lucía Amalia; Cabrera-Bean, Margarita; Danés Castells, Marc; Zabaleta del Olmo, Edurne; Roso Llorach, Albert; Violán Fors, Concepción (2023-06-27)
    Article
    Open Access
    Background: Multimorbidity and frailty are characteristics of aging that need individualized evaluation, and there is a 2-way causal relationship between them. Thus, considering frailty in analyses of multimorbidity is ...
  • On the estimation of Tsallis entropy and a novel information measure based on its properties 

    Martí Espelt, Aniol; Cabrera Estanyol, Ferran de; Riba Sagarra, Jaume (2023-06-30)
    Article
    Open Access
    This letter explores a plug-in estimator of second-order Tsallis entropy based on Kernel Density Estimation (KDE) and its implicit regularization process. First, it is shown that the expected value of the estimator corresponds ...
  • 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
    Open Access
    We 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 ...
  • Regularized estimation of information via canonical correlation analysis on a finite-dimensional feature space 

    Cabrera Estanyol, Ferran de; Riba Sagarra, Jaume (2023-08)
    Article
    Open Access
    This paper aims to estimate the information between two random phenomena by using consolidated second-order statistics tools. The squared-loss mutual information, a surrogate of the Shannon mutual information, is chosen ...
  • Interference mitigation in feedforward opportunistic communications 

    Borràs Pino, Jordi; Vázquez Grau, Gregorio (2023-05)
    Article
    Open Access
    This paper deals with scenario-aware, uncoordinated, and distributed signaling techniques in the context of feedforward opportunistic communications, that is, when the opportunistic transmitting node does not cooperate ...
  • Rate optimization for RIS-aided mMTC networks in the finite blocklength regime 

    Liesegang Maria, Sergi; Zappone, Alessio; Muñoz Medina, Olga; Pascual Iserte, Antonio (2023-03)
    Article
    Open Access
    Reconfigurable intelligent surfaces (RISs) have become a promising candidate for the development of future mobile systems. In the context of massive machine-type communications (mMTC), a RIS can be used to support the ...
  • Perfect and quasi-perfect codes for the Bosonic classical-quantum channel 

    Blasco Coll, Andreu; Rodríguez Fonollosa, Javier (2023-01-18)
    Article
    Open Access
    We explore perfect and quasi-perfect codes for the Bosonic channel, where information is generated by a laser and conveyed in the form of coherent states. In particular, we consider the phase-modulation codebook for coherent ...

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