IC - Artículos: Envíos recientes
Mostrando ítems 21-37 de 37
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Coordinated Multicast/Unicast Transmission on 5G: A Novel Approach for Linear Broadcasting
Jiménez-Soria, David; Martín-Vega, Francisco J.; Aguayo-Torres, Maria del Carmen
(Springer, 2021-09-16)
Linear broadcasting services, with a scheduled programming, constitute a paramount tel-ecommunication service for today’s society. Although the existing technology is mature, current linear broadcast ... -
An enhanced symmetric-key based 5G-AKA protocol
Munilla-Fajardo, Jorge; Burmester, Mike; Barco-Moreno, Raquel (Elsevier, 2021)
5G technology is called to support the next generation of wireless communications and realize the “Internet of Everything” through its mMTC (massive Machine-Type-Communications) service. The recently standardized 5G-AKA ... -
Energy-Efficient Packet Forwarding Scheme Based on Fuzzy Decision-Making in Underwater Sensor Networks
Pabani, Jitander Kumar; Luque-Nieto, Miguel Ángel; Hyder, Waheeduddin; Otero-Roth, Pablo (MDPI, 2021-06-25)
Underwater Wireless Sensor Networks (UWSNs) are subjected to a multitude of real-life challenges. Maintaining adequate power consumption is one of the critical ones, for obvious reasons. This includes proper energy consumption ... -
Random Errors in Broadband Characterization of the Propagation Constant of Transmission Lines Using Multiple Two-Port Measurements
Perez-Escribano, Mario; Márquez-Segura, Enrique (IEEE Access, 2021)
In this work, a comparison between three broadband methods used to estimate the propagation constant of planar transmission lines is presented. The goal of this comparison is to study how possible random measurement ... -
Parameters characterization of dielectric materials samples in microwave and millimeter-wave bands
Perez-Escribano, Mario; Márquez-Segura, Enrique (IEEE Transactions on Microwave Theory and Techniques, 2021-03-06)
In this work, an optimized broadband method using multilayer transmission lines to characterize dielectric permittivity and loss tangent of material samples is presented. For this purpose, a microstrip line loaded with a ... -
An energy-efficient integration of a digital modulator and a Class-D amplifier
Zia, M.Y.I.; Tierno, Raúl; Luque-Nieto, Miguel Ángel; Otero-Roth, Pablo (MDPI, 2020-08-16)
Energy consumption is always a key feature in devices powered by electric accumulators. The power amplifier is the most energy-demanding module in mobile devices, portable appliances, static transceivers, and even nodes ... -
A data-driven scheduler model for QoE assessment in a LTE radio network planning tool
Sánchez Ordoñez, Pablo; Luna-Ramírez, Salvador; Gijón, Carolina; Toril-Genoves, Matias; Bejarano-Luque, Juan Luis (2019-11-19)
The use of static system-level simulators is common practice for estimating the impact of re-planning actions in cellular networks. In this paper, a modification of a classical static Long Term Evolution (LTE) simulator ... -
Self-Organizing and Scalable Routing Protocol (SOSRP) for Underwater Acoustic Sensor Networks
Kumar Hindu, Sateesh; Hyder, Waheeduddin; Luque-Nieto, Miguel Ángel; Otero-Roth, Pablo; Poncela-Gonzalez, Javier (MDPI, 2019-07-16)
Underwater Acoustic Sensor Networks (UASN) have two important limitations: a very aggressive (marine) environment, and the use of acoustic signals. This means that the techniques for terrestrial wireless sensor networks ... -
Tilted subwavelength gratings: controlling anisotropy in metamaterial nanophotonic waveguides
Luque González, J. Manuel; Herrero-Bermello, Alaine; Ortega-Moñux, Alejandro; Molina-Fernandez, Iñigo; Halir, Robert; Wang, Shurui; Schmid, Jens H.; Cheben, Pavel; Velasco, Aitor V.[et al.] (2018-10-24)
Subwavelength grating (SWG) structures are an essential tool in silicon photonics, enabling the synthesis of metamaterials with a controllable refractive index. Here we propose, for the first time to the best of our ... -
Optimal scheduling and fair servicepolicy for STDMA in underwater networks with acoustic communications
Luque-Nieto, Miguel Ángel; Moreno-Roldán, José-Miguel; Otero-Roth, Pablo; Poncela-Gonzalez, Javier (MDPI, 2018-02)
In this work, a multi-hop string network with a single sink node is analyzed. A periodic optimal scheduling for TDMA operation that considers the characteristic long propagation delay of the underwater acoustic channel is ... -
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 ... -
Asymptotically Exact Approximations for the Symmetric Difference of Generalized Marcum-Q Functions
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 ... -
On the Calculation of the Incomplete MGF with Applications to Wireless Communications
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 ... -
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 ... -
The κ-µ Shadowed Fading Model with Integer Fading Parameters
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 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 ... -
Optimal Fair Scheduling in S-TDMA Sensor Networks for Monitoring River Plumes
Luque-Nieto, Miguel Ángel; Moreno-Roldán, José Miguel; Poncela-Gonzalez, Javier; Otero-Roth, Pablo (Hindawi Publishing Corporation, 2016)
Underwater wireless sensor networks (UWSNs) are a promising technology to provide oceanographers with environmental data in real time. Suitable network topologies to monitor estuaries are formed by strings coming together ...