• A MATLAB program for the computation of the confluent hypergeometric function Φ2 

      Martos-Naya, Eduardo; Romero-Jerez, Juan Manuel; Lopez-Martinez, F. Javier; Paris-Angel, Jose Francisco (2016-09-22)
      We here present a sample MATLAB program for the numerical evaluation of the confluent hypergeometric function Φ2. This program is based on the calculation of the inverse Laplace transform using the algorithm suggested by ...
    • A New Framework for the Performance Analysis of Wireless Communications under Hoyt (Nakagami-q) Fading 

      Romero-Jerez, Juan Manuel; Lopez-Martinez, F. Javier (IEEE, 2017)
      We present a novel relationship between the distribution of circular and non-circular complex Gaussian random variables. Specifically, we show that the distribution of the squared norm of a non-circular complex Gaussian ...
    • Analysis of energy detection of unknown signals under Beckmann fading channels 

      Peña-Martin, Juan Pedro; Romero-Jerez, Juan Manuel; Lopez-Martinez, F. Javier (IEEE, 2017)
      The Beckmann fading is a general multipath fading model which includes Rice, Hoyt and Rayleigh fading as particular cases. However, the generality of the Beckmann fading also implies a significant increased mathematical ...
    • Arquitectura HW para decodificador Two-Step SOVA con recorridos hacia atrás sistólicos 

      Martín-Vega, Francisco J.; Lopez-Martinez, F. Javier; Entrambasaguas, J. Tomás (2012-09-12)
      In this paper, a novel SOVA (Soft-Output Viterbi algorithm) decoder using systolic arrays to carry out the trace-back method is presented. Systolic arrays are associated with high data rates and small resource requirements, ...
    • Asymptotically Exact Approximations for the Symmetric Difference of Generalized Marcum-Q Functions 

      Lopez-Martinez, F. Javier; Romero-Jerez, Juan Manuel; Lopez-Martinez, F. Javier (IEEE, 2015)
      In this paper, we derive two simple and asymptotically exact approximations for the function defined as ΔQm(a, b) =Δ Qm(a, b) - Qm(b, a). The generalized Marcum Q-function Qm(a, b) appears in many scenarios in communications ...
    • Backing off from rayleigh and rice: Achieving perfect secrecy in wireless fading channels 

      Ramírez Espinosa, Pablo; Lopez-Martinez, F. Javier (Escuela Técnica Superior de Ingeniería de Telecomunicación de la UMA, 2020-09)
      We show that for a legitimate communication under multipath quasi-static fading with a reduced number of scatter- ers, it is possible to achieve perfect secrecy even in the presence of a passive eavesdropper for which no ...
    • Capacity Limits of Spectrum-Sharing in Hoyt (Nakagami-q) Fading Channels 

      Romero-Jerez, Juan Manuel; Lopez-Martinez, F. Javier (2016-10-06)
      A channel capacity analysis is presented in this work for a spectrum-sharing cognitive radio link in which the fading experienced by the signal is modeled with the Hoyt (Nakagami-q) distribution. Based on a novel formulation ...
    • Generalized MGF of Beckmann Fading with Applications to Wireless Communications Performance Analysis 

      Peña-Martin, Juan Pedro; Romero-Jerez, Juan Manuel; Lopez-Martinez, F. Javier (IEEE Transaction on Communications, 2017)
      The Beckmann distribution is a general multipath fading model for the received radio signal in the presence of a large number of scatterers, which can thence be modeled as a complex Gaussian random variable where both the ...
    • On the Calculation of the Incomplete MGF with Applications to Wireless Communications 

      Lopez-Martinez, F. Javier; Romero-Jerez, Juan Manuel; Paris-Angel, Jose Francisco (IEEE, 2017)
      The incomplete moment generating function (IMGF) has paramount relevance in communication theory, since it appears in a plethora of scenarios when analyzing the performance of communication systems. We here present a general ...
    • On the system performance of DFT-S-OFDM and CP-OFDM for 5G Uplink in mmWave band 

      Villena-Rodríguez, Alejandro; Martín-Vega, Francisco J.; Lopez-Martinez, F. Javier; Gómez, Gerardo; Outes-Carnero, José; [et al.] (2021-09-20)
      Both conventional Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) and Discrete Fourier Transform Spread OFDM (DFT-S-OFDM) have been adopted for their use in the Physical Uplink Shared Channel (PUSCH) in ...
    • Performance analysis of MIMO-OFDM systems using complex Gaussian quadratic forms 

      Lopez-Martinez, F. Javier (Universidad de Málaga, Servicio de Publicaciones, 2010)
      En este trabajo se proponen aportaciones originales para el análisis de prestaciones en sistemas multiantena con múltiples portadoras, mediante el desarrollo de nuevas técnicas matemáticas para el cálculo de probabilidades ...
    • The dynamics of user channels in massive MIMO systems 

      Martos-Naya, Eduardo; Lopez-Martinez, F. Javier; Paris-Angel, Jose Francisco; Goldsmith, Andrea (2014-10-31)
      The SNR associated with the different users in large-scale MIMO systems depends on the magnitude of the eigenvalues of the channel power matrix HH H. While it is known that the spread between the best and worst channels ...
    • The Fluctuating Two-Ray Fading Model for mmWave Communications 

      Romero-Jerez, Juan Manuel; Lopez-Martinez, F. Javier; Paris-Angel, Jose Francisco; Goldsmith, Andrea (IEEE, 2016)
      We introduce the Fluctuating Two-Ray (FTR) fading model, a new statistical channel model that consists of two fluctuating specular components with random phases plus a diffuse component. The FTR model arises as a natural ...
    • The fluctuating two-ray fading model: exact and approximate statistical characterization 

      Romero-Jerez, Juan Manuel; Lopez-Martinez, F. Javier; Paris-Angel, Jose Francisco; Goldsmith, Andrea (2017-07-21)
      We introduce the Fluctuating Two-Ray (FTR) fading model, a new statistical channel model that consists of two fluctuating specular components with random phases plus a diffuse component. The PDF and MGF are expressed in ...
    • The Fluctuating Two-Ray Fading Model: Statistical Characterization and Performance Analysis 

      Romero-Jerez, Juan Manuel; Lopez-Martinez, F. Javier; Paris-Angel, Jose Francisco; Goldsmith, Andrea (IEEE, 2017)
      We introduce the fluctuating two-ray (FTR) fading model, a new statistical channel model that consists of two fluctuating specular components with random phases plus a diffuse component. The FTR model arises as the natural ...
    • The κ-µ Shadowed Fading Model with Integer Fading Parameters 

      Lopez-Martinez, F. Javier; Paris-Angel, Jose Francisco; Romero-Jerez, Juan Manuel (IEEE, 2017)
      We show that the popular and general κ-μ shadowed fading model with integer fading parameters μ and m can be represented as a mixture of squared Nakagami- m̂ (or Gamma) distributions. Thus, its PDF and CDF can be expressed ...
    • A Tractable Line-of-Sight Product Channel Model: Application to Wireless Powered Communications 

      Lopez-Martinez, F. Javier; Moreno-Pozas, Laureano; Fernández-Plazaola, Unai; Paris-Angel, Jose Francisco; Martos-Naya, Eduardo; [et al.] (2018-07-30)
      We here present a general and tractable fading model for line-of-sight (LOS) scenarios, which is based on the product of two independent and non-identically distributed κ- μ shadowed random variables. Simple closed-form ...
    • Understanding the impact of line-of-sight in the ergodic spectral efficiency of cellular networks 

      Garcia-Corrales, Celia; Martín-Vega, Francisco J.; Lopez-Martinez, F. Javier; Cañete-Corripio, Francisco Javier; Paris-Angel, Jose Francisco (2018-09-27)
      In this paper we investigate the impact of lineof-sight (LoS) condition in the ergodic spectral efficiency of cellular networks. To achieve this goal, we have considered the kappa-mu shadowed model, which is a general model ...