• NB-IoT latency evaluation with real measurements 

      Segura, David; Jatib Khatib, Emil; Munilla-Fajardo, Jorge; Barco-Moreno, Raquel (2022-07)
      In the 3GPP LTE Release 13, NB-IoT was standardized to provide wide-area connectivity for IoT. To optimize network signaling and power consumption, control plane (CP) optimization was introduced. In Release 15, to support ...
    • Network Anomaly Classification by Support Vector Classifiers Ensemble and Non-linear Projection Techniques 

      De la Hoz, Emiro; Ortiz-Garcia, Andres; Ortega, Julio; De la Hoz, Eduardo (Springer, 2013-09)
      Network anomaly detection is currently a challenge due to the number of different attacks and the number of potential attackers. Intrusion detection systems aim to detect misuses or network anomalies in order to block ports ...
    • New open access software designed for the recognition of daily microstructures used in ageing fish 

      Nava-Baro, Enrique; Rey, Javier; Clemente-Medina, Maria del Carmen; García, Alberto; Otero-Roth, Pablo; [et al.] (2014-10-28)
      Ageing methods for most of the exploited fish species are not validated, and consequently age data series often have important gaps and uncertainty manifesting its consequences on age-based fisheries assessment. In ...
    • Non-homogeneous Fabry-Pérot Antenna Design at Ku-band 

      Mateos-Ruiz, Pablo; Abdo-Sanchez, Maria Elena; Camacho-Peñalosa, Carlos (2021-09-21)
      A novel technique to design Fabry-Pérot antennas with non-homogeneous PRS is described. It takes advantage of a transmission line circuit model to efficiently obtain all necessary unit cell designs that satisfy the cavity ...
    • Non-homogeneous Fabry-Pérot antenna design process to improve aperture efficiency 

      Mateos Ruíz, Pablo; Abdo-Sanchez, Maria Elena; Camacho-Peñalosa, Carlos (2022-03-27)
      A novel technique to design Fabry-Pérot antennas with non-homogeneous partially reflective surfaces (PRSs) is described. It uses a transmission line circuit model to efficiently obtain all necessary unit cell designs that ...
    • Novel Implementation for a Cavity-Backed Slot Fed in Transmission Configuration 

      Camacho-Peñalosa, Carlos; Hernández Escobar, Alberto; Abdo-Sanchez, Maria Elena (2018-04-23)
      A novel radiating element proposed previously by the authors is alternatively implemented using enclosed microstrip configuration. The radiating element shows broad impedance bandwidth and unidirectional radiation pattern. ...
    • Obtaining quasi-static models using a frequency domain extraction methodology 

      Pérez-Parras, Sergio; Martin-Guerrero, Teresa Maria; Baños-Polglase, Juana Daphne; Camacho-Peñalosa, Carlos (2018-07-02)
      This contribution illustrates how a realistic nonlinear quasi-static model for FET-type devices can be extracted using an original frequency domain extraction technique. An ideal ‘made-up’ device is built from the measured ...
    • Obtención de intervalos de confianza en redes neuronales para predicción en redes celulares 

      Bejarano-Luque, Juan Luis; Toril-Genoves, Matias; Gijón, Carolina; Luna-Ramírez, Salvador; Durán-Martínez, Álvaro (2022-09)
      Hoy en día, las redes celulares presentan una complejidad extrema y un alto grado de dinamismo, lo que hace que predecir las fluctuaciones en el rendimiento de la red sea una tarea extremadamente difícil. Gracias a ...
    • On Some Unifications Arising from the MIMO Rician Shadowed Model 

      Moreno Pozas, Laureano; Martos-Naya, Eduardo (IEEE, 2016)
      This paper shows that the proposed Rician shadowed model for multi-antenna communications allows for the unification of a wide set of models, both for multiple-input multiple-output (MIMO) and single- input single-output ...
    • On the effect of random power availability in wireless power transfer systems with physical layer security 

      Tarrias-Muñoz, Antonio; Romero-Jerez, Juan Manuel; López Martínez, Francisco Javier (2020-10-22)
      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 eigenstate equivalent circuit for lossy asymmetric two-ports and its applications 

      Esteban, Jaime; Hernández Escobar, Alberto; Abdo-Sanchez, Maria Elena; Mateos Ruíz, Pablo; Martin-Guerrero, Teresa Maria; [et al.] (2022)
      An equivalent-circuit topology for two-port lossy non-symmetric reciprocal networks is presented [1]. The circuit topology is based on the eigenstate decomposition. The proposed circuit consists of two immittances and two ...
    • On the Phase Response and Radiation Efficiency of the Complementary Strip-Slot as an Array Element 

      Abdo-Sanchez, Maria Elena; Martin-Guerrero, Teresa Maria; Esteban Marzo, Jaime; Camacho-Peñalosa, Carlos (2015-05-05)
      The complementary strip-slot element is a broadlymatched microstrip radiator that has been used to design innovative series-fed arrays. It consists of a microstrip series-fed slot that have its complementary stub on the ...
    • 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 ...
    • On the use of bianisotropic huygens' metasurfaces to build leaky-wave antennas 

      Abdo-Sanchez, Maria Elena; Chen, M.; Epstein, Ariel; Eleftheriades, G. V. (2019-07-16)
      Huygens' metasurfaces are considered a powerful tool to achieve anomalous electromagnetic field transformations. They consist of an artifcial surface built of pairs of collocated electric and magetic dipoles that force ...
    • On the Utility of the Inverse Gamma Distribution in Modeling Composite Fading Channels 

      Ramírez Espinosa, Pablo; López Martínez, Francisco Javier (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 ...
    • Operación multihop eficiente en redes acústicas submarinas de sensores con planificación TDMA 

      Moreno-Roldán, José-Miguel; Luque-Nieto, Miguel Ángel; Poncela-Gonzalez, Javier; Otero-Roth, Pablo (2018-03-22)
      Dos de los problemas a los que se enfrentan las comunicaciones inalámbricas submarinas, y que limitan sobremanera la velocidad de transmisión de los datos, son (i) la atenuación en el medio acuático, que es selectiva en ...
    • Optimización de la calidad de experiencia en escenarios de multiconectividad 

      De la Bandera Cascales, Isabel; Palacios, David; Burgueño Romero, Jesús; Barco-Moreno, Raquel (2019-10-30)
      The vertiginous evolution of mobile communications networks is affecting not only the complexity and size of them, but also the way that these new networks have to be managed. Nowadays, the network management, and specially ...
    • Optimización de señalización en el canal común descendente para el estándar LTE-LAA 

      Fortes-Rodriguez, Sergio; Baena-Martinez, Eduardo; Baena González, José Carlos; Barco-Moreno, Raquel (2019-11-05)
      The use of unlicensed bands is one of the most promising features envisaged to increase capacity in cellular networks. However, this poses multiple challenges associated to the operation of LTE based standards with coexisting ...
    • Parametric model of spectral envelope to synthesize realistic intensity variations in singing voice 

      Molina, Emilio; Barbancho-Perez, Isabel; Barbancho-Perez, Ana Maria; Tardon-Garcia, Lorenzo Jose (2014-05-28)
      In this paper, we propose a method to synthesize the natural variations of spectral envelope as intensity varies in singing voice. To this end, we propose a parametric model of spectral envelope based on novel 4-pole ...
    • Parametrización física de canales ópticos turbulentos modelados con la distribución M 

      Garrido Balsells, José María; Puerta Notario, Antonio; Jurado Navas, Antonio; del Castillo Vázquez, Miguel (2018-09-14)
      En esta contribución se presenta el análisis del índice de escintilación y su relación con los parámetros físicos de la turbulencia en el canal óptico atmosférico, suponiendo que el centelleo inducido por la turbulencia ...