Listar por autor "López-Martínez, Francisco Javier"
Mostrando ítems 21-37 de 37
-
On the effect of random power availability in wireless power transfer systems with physical layer security
In this paper, we evaluate the performance of wireless powered communication systems from a physical layer security perspective. Our aim is to determine under which conditions the random power availability due to wireless ... -
On the system performance of DFT-S-OFDM and CP-OFDM for 5G Uplink in mmWave band
(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 ... -
On the Utility of the Inverse Gamma Distribution in Modeling Composite Fading Channels
(2020-01-20)We introduce a general approach to characterize composite fading models based on inverse gamma (IG) shadowing. We first determine to what extent the IG distribution is an adequate choice for modeling shadow fading, by means ... -
Performance analysis of MIMO-OFDM systems using complex Gaussian quadratic forms
(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 ... -
Physical Layer Security of Large Reflecting Surface Aided Communications with Phase Errors.
(IEEE, 2020-10-09)The physical layer security (PLS) performance of a wireless communication link through a large reflecting surface (LRS) with phase errors is analyzed. Leveraging recent results that express the LRS-based composite channel ... -
Physical Layer Security Techniques for Beyond 5G Networks
(UMA Editorial, 2024)El aumento en el número de conexiones inalámbricas debido al Internet de las cosas (IoT) y la llegada de la quinta generación de redes móviles (5G) ha propiciado un aumento en las preocupaciones sobre el rendimiento de las ... -
Statistical Characterization of the Chunk Size Distribution in DASH
Vaca-Rubio, Cristian J.; Gómez-Paredes, Gerardo
; Aguayo-Torres, María del Carmen; López-Martínez, Francisco Javier (2019-09-13)
We present a statistical characterization of the segment size distribution of video streaming services based on dynamic adaptive streaming over HTTP (DASH). We first obtain the empirical distributions from traffic captures ... -
The dynamics of user channels in massive MIMO systems
Martos-Naya, Eduardo; López-Martínez, Francisco Javier; París-Ángel, José 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; López-Martínez, Francisco Javier; París-Ángel, José 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; López-Martínez, Francisco Javier; París-Ángel, José 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; López-Martínez, Francisco Javier; París-Ángel, José 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
López-Martínez, Francisco Javier; París-Ángel, José 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 ... -
The κ–μ Shadowed Fading Model: Unifying the κ–μ and η–μ Distributions
Moreno-Pozas, Laureano; López-Martínez, Francisco Javier; París-Ángel, José Francisco; Martos-Naya, Eduardo (IEEE Transactions on Vehicular Technology, 2016-12)
This paper shows that the recently proposed k-μ shadowed fading model includes, besides the k-μ model, the η-μ fading model as a particular case. This has important relevance in practice, as it allows for the unification ... -
A Tractable Line-of-Sight Product Channel Model: Application to Wireless Powered Communications
López-Martínez, Francisco Javier; Moreno-Pozas, Laureano; Fernández-Plazaola, Unai; París-Ángel, José Francisco; Martos-Naya, Eduardo; Romero-Jerez, Juan Manuel[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 ... -
Unconventional distributions for wireless fading modeling.
(UMA Editorial, 2024)El rápido desarrollo de los sistemas de comunicaciones inalámbricos en la última década ha venido de la mano de la profusión de nuevos casos de uso en al ámbito de 4G, 5G y sus evoluciones, así como al uso de nuevas ... -
Understanding the impact of line-of-sight in the ergodic spectral efficiency of cellular networks
García-Corrales, Celia; Martín-Vega, Francisco-Javier; López-Martínez, Francisco Javier; Cañete-Corripio, Francisco Javier; París-Ángel, José 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 ... -
Wireless backhaul: Performance Modelling and Impact on User Association for 5G.
(IEEE, 2018-02-22)Wireless technology is the strongest contender for catering for the 5G backhaul (BH) stipulated performance, where optical fiber is unavailable. In the presence of ultra-dense networks, such occurrences are exponentially ...