Browsing by Author "Font Segura, Josep"

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  • Cocco, Giuseppe; Guillén i Fábregas, A. (Albert); Font Segura, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    For random-coding ensembles with pairwise-independent codewords, we show that the probability that the exponent of a given code from the ensemble being smaller than an upper bound on the typical random-coding exponent is ...
  • Colombaro, Ivano; Font Segura, Josep; Martínez, Alfonso, 1973- (MDPI, 2021)
    In this paper, we review two related aspects of field theory: the modeling of the fields by means of exterior algebra and calculus, and the derivation of the field dynamics, i.e., the Euler– Lagrange equations, by means ...
  • Martinez, Alfonso; Font Segura, Josep; Colombaro, Ivano (Springer, 2021)
    This paper characterizes the symmetric rank-2 stress–energy–momentum tensor associated with fields whose Lagrangian densities are expressed as the dot product of two multivector fields, e.g., scalar or gauge fields, in ...
  • Colombaro, Ivano; Font Segura, Josep; Martinez, Alfonso (MDPI, 2019)
    The basic concepts of exterior calculus for space–time multivectors are presented: Interior and exterior products, interior and exterior derivatives, oriented integrals over hypersurfaces, circulation and flux of multivector ...
  • Colombaro, Ivano; Font Segura, Josep; Martinez, Alfonso (IOP Publishing Ltd., 2021)
    We present a derivation of a manifestly symmetric form of the stress-energy-momentum using the mathematical tools of exterior algebra and exterior calculus, bypassing the standard symmetrizations of the canonical tensor. ...
  • Colombaro, Ivano; Font Segura, Josep; Martínez, Alfonso, 1973- (Springer, 2020)
    This paper presents an exterior-algebra generalization of electromagnetic fields and source currents as multivectors of grades r and r−1, respectively, in a flat space-time with n space and k time dimensions. Formulas for ...
  • Font Segura, Josep; Wang, Xiaodong (Institute of Electrical and Electronics Engineers (IEEE), 2010)
    We consider the spectrum sensing problem in cognitive radio networks. We offer a framework for optimal joint detection and parameter estimation when the secondary users have only a small number of signal samples. We discuss ...
  • Font Segura, Josep; Martínez, Alfonso, 1973-; Guillén i Fábregas, A. (Albert) (Institute of Electrical and Electronics Engineers (IEEE), 2020)
    This paper proposes an efficient simulation method based on importance sampling to estimate the random-coding error probability of coded modulation. The technique is valid for complex-valued modulations over Gaussian ...
  • Rezazadeh, Arezou; Font Segura, Josep; Martínez, Alfonso, 1973-; Guillén i Fábregas, A. (Albert) (MDPI, 2021)
    This paper studies a generalized version of multi-class cost-constrained random-coding ensemble with multiple auxiliary costs for the transmission of N correlated sources over an N-user multiple-access channel. For each ...
  • Martínez, Alfonso, 1973-; Colombaro, Ivano; Font Segura, Josep (Springer, 2021)
    This paper studies the relativistic angular momentum for the generalized electromagnetic field, described by r-vectors in (k, n) space-time dimensions, with exterioralgebraic methods. First, the angular-momentum tensor is ...
  • Cocco, Giuseppe; Guillén i Fábregas, A. (Albert); Font Segura, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2022)
    We derive a lower bound on the typical random-coding (TRC) exponent of pairwise-independent codeword ensembles used over a finite-state channel (FSC) at rates below capacity. Under some conditions, we also show that the ...

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