Listar IC - Artículos por título
Mostrando ítems 130-149 de 182
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Parameters characterization of dielectric materials samples in microwave and millimeter-wave bands
Pérez-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 ... -
PCA filtering and Probabilistic SOM for Network Intrusion Detection.
De la Hoz Correa, Eduardo; De la Hoz Franco, Emiro; Ortiz-García, Andrés; Ortega, Julio; Prieto, Beatriz (Elsevier, 2015-09-21)
The growth of the Internet and, consequently, the number of interconnected computers, has exposed significant amounts of information to intruders and attackers. Firewalls aim to detect violations according to a predefined ... -
Perfectly vertical surface grating couplers using subwavelength engineering for increased feature sizes.
Kamandar Dezfouli, Mohsen; Grinberg, Yuri; Melati, Daniele; Cheben, Pavel; Schmid, Jens H.; Sánchez-Postigo, Alejandro; Ortega-Moñux, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Cheriton, Ross; Janz, Siegfried; Xu, Dan-Xia; Schmid, Jens H.[et al.] (Optica, 2020-06-29)
We present perfectly vertical grating couplers for the 220 nm silicon-on-insulator platform incorporating subwavelength metamaterials to increase the minimum feature sizes and achieve broadband low back-reflection. Our ... -
Performance Evaluation of Broadband Characterization of Coupled Transmission Lines Even- and Odd-Mode Propagation Constants Using Differential and Common Mode S-Parameters
Pérez-Escribano, Mario; Márquez-Segura, Enrique (IEEE Journal of Microwaves, 2023)
This work encompasses some relevant issues that arise when using a broadband method to characterize the even and odd mode propagation constants of symmetric microstrip coupled lines using four-port pure-mode differential ... -
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 ... -
Polarization insensitive metamaterial engineered multimode interference coupler in a 220 nm silicon-on-insulator platform
Pérez-Armenta, Carlos; Ortega-Moñux, Alejandro; Luque-González, José Manuel; Halir, Robert; Schmid, Jens; Cheben, Pavel; Molina-Fernández, Íñigo; Wanguemert-Pérez, Juan Gonzalo[et al.] (Elsevier, 2023)
High-index contrast silicon waveguides exhibit strong birefringence that hinders the development of polarization-insensitive devices, especially for sub-micrometer silicon layer thickness. Here a polarizationindependent 2 ... -
Polarization splitting directional coupler using tilted subwavelength gratings
Luque-González, José Manuel; Herrero-Bermello, Alaine; Ortega-Moñux, Alejandro; Sánchez-Rodriguez, Marina; Velasco, Aitor V.; Schmid, Jens; Cheben, Pavel; Molina-Fernández, Íñigo; Halir, Robert[et al.] (Optica Publishing Group, 2020)
On-chip polarization splitters are key elements for coherent optical communication systems and polarization diversity circuits. These devices are often implemented with directional couplers that are symmetric for one ... -
Preprocessing for Lessening the Influence of Eye Artifacts in EEG Analysis.
Villena-Rodríguez, Alejandro; Tardón-García, Lorenzo José; Barbancho-Pérez, Isabel; Barbancho-Pérez, Ana María; Brattico, Elvira; Haumann, Niels T.[et al.] (MDPI, 2019-04-27)
We dealt with the problem of artifacts in EEG signals in relation to the usage of lengthy trials. Specifically, we considered eye artifacts found in EEG signals, their influence in the analysis of the data and alternatives ... -
Proactive dual connectivity for automated guided vehicles in outdoor industrial environment
Mendoza, Jessica; Kovács, István Z.; López, Melisa; Sørensen, Troels B.; Adeogun, Ramoni; De la Bandera Cascales, Isabel; Barco-Moreno, Raquel[et al.] (IEEE, 2022)
5G communication systems are one of the major enabling technologies to meet the needs of Industry 4.0. This paper focuses on the use case of automated guided vehicles (AGVs) in an outdoor industrial scenario. To meet the ... -
Probabilistic and explainable modeling of Phase–Phase Cross-Frequency Coupling patterns in EEG. Application to dyslexia diagnosis
Castillo-Barnes, Diego; Gallego-Molina, Nicolás J.; Formoso, Marco A.; Ortiz-García, Andrés; Figueiredo, Patrícia; Luque-Vilaseca, Juan Luis[et al.] (Elsevier, 2024)
This work explores the intricate neural dynamics associated with dyslexia through the lens of Cross-Frequency Coupling (CFC) analysis applied to electroencephalography (EEG) signals evaluated from 48 seven-year-old Spanish ... -
Probabilistic Combination of Non-Linear Eigenprojections For Ensemble Classification.
Arco, Juan E.; Ortiz-García, Andrés; Ramírez, Javier; Martínez-Murcia, Francisco Jesús; Zhang, Yu-Dong; Broncano, Jordi; Berbís, Álvaro; Royuela-del-Val, Javier; Luna, Antonio; Górriz-Sáez, Juan Manuel[et al.] (IEEE, 2022-10-10)
The emergence of new technologies has changed the way clinicians perform diagnosis. Medical imaging play a crucial role in this process, given the amount of information that they usually provide as non-invasive techniques. ... -
Proof of Concept of the Use of the Parametric Effect in Two Media with Application to Underwater Acoustic Communications.
(MDPI, 2023-08-15)Nonlinear acoustics offers a new range of acoustic applications that are currently being exploited. The parametric nonlinear effect—the occurrence of low frequencies with modulated high-frequency emission—is of particular ... -
QPSK modulation in the O-band using a single dual-drive Mach-Zehnder silicon modulator
Pérez-Galacho, Diego; Bramerie, Laurent; Baudot, Charles; Chaibi, Mohamed; Messaoudène, Sonia; Vulliet, Nathalie; Vivien, Laurent; Peucheret, Christophe; Marris-Morini, Delphine[et al.] (IEEE, 2018-09-15)
Keeping up with bandwidth requirements in next generation short- and long-reach optical communication systems will require migrating from simple modulation formats such as on-off keying (OOK) to more advanced formats such ... -
Random Errors in Broadband Characterization of the Propagation Constant of Transmission Lines Using Multiple Two-Port Measurements
Pérez-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 ... -
Reconfigurability mechanisms with scanning rate control for omega-bianisotropic Huygens’ metasurface leaky-wave antennas
Abdo-Sánchez, María Elena; Epstein, Ariel; Eleftheriades, George V. (IEEE, 2019)
In this paper, different reconfigurability mechanisms are proposed to scan the pointing direction at a fixed frequency of recently-proposed leaky-wave antennas based on omega-bianisotropic Huygens' metasurfaces. The ... -
Secure communication for FSO links in the presence of eavesdropper with generic location and orientation
Boluda-Ruiz, Rubén; Castillo-Vázquez, Beatriz; García-Zambrana, Antonio; Qaraqe, Khalid (Optica Publishing Group, 2019)
When the beam waist at the receiver is significantly larger than the receiver size, free-space optical (FSO) links may be vulnerable to some optical tapping risks at the physical layer. In this paper, we conduct a new ... -
Self-Healing Framework for Next-Generation Networks through Dimensionality Reduction.
Palacios, David; Fortes-Rodríguez, Sergio; De la Bandera Cascales, Isabel; Barco-Moreno, Raquel (IEEE, 2018-07-25)
Next generation self-organizing networks (NGSONs) are the key that will lead to the full automation of the network management in the forthcoming generations of cellular communications. New challenges, like the deployment of ... -
Self-healing in mobile networks with big data
Jatib Khatib, Emil; Barco-Moreno, Raquel; Muñoz, Pablo; De la Bandera Cascales, Isabel; Serrano, Inmaculada (IEEE, 2016-01)
Mobile networks have rapidly evolved in recent years due to the increase in multimedia traffic and offered services. This has led to a growth in the volume of control data and measurements that are used by self-healing ... -
Self-Organized Ad Hoc Mobile (SOAM) Underwater Sensor Networks.
Hyder, Waheeduddin; Kumar, Jitander; Luque-Nieto, Miguel Ángel; Laghari, Asif Ali; Otero-Roth, Pablo (IEEE, 2022)
The need of underwater wireless sensor networks (UWSNs) having mobile sensor nodes has been there for a long time in form of underwater warfare or explorations by autonomous underwater vehicles (AUVs) or remote unmanned ... -
Self-Organized Fast Routing Protocol for Radial Underwater Networks.
Hyder, Waheeduddin; Poncela-González, Javier; Luque-Nieto, Miguel Ángel; Otero-Roth, Pablo (MDPI, 2018-11-28)
An underwater wireless sensor networks (UWSNs) is an emerging technology for environmental monitoring and surveillance. One of the side effects of the low propagation speed of acoustic waves is that routing protocols of ...