• A general approach for robust integrated polarization rotators 

      Alonso-Ramos, C.; Halir, Robert; Ortega Moñux, Alejandro; Cheben, Pavel; Vivien, Laurent; [et al.] (International Society for Optics and Photonics, 2013)
      Integrated polarization rotators suffer from very high sensitivity to fabrication errors. A polarization rotator scheme that substantially increases fabrication tolerances is proposed. In the proposed scheme, two tunable ...
    • Análisis y Diseño de Filtros Paso Banda con Alta Selectividad Espectral Basados en Líneas de Transmisión Multiconductoras 

      Sánchez-Martínez, Juan José; Márquez-Segura, Enrique (2013-09-19)
      A new wideband planar bandpass filter consists of two series wire-bonded multiconductor transmission lines (MTL) and a shunt short-circuited MTL is presented and analyzed. A comprehensive study of the proposed topology ...
    • Caracterización y Simulación de un Diodo Schottky de Microondas 

      Moreno Pozas, Laureano; Durán Valdeiglesias, Elena; Ávila Ruiz, Juan Manuel; Molina Fernández, Íñigo (2013-09)
      Microwave diode models included in commercial simulators use a large set of parameters, so they are often difficult to set up in order to match the actual response of a specific device. In this paper a simple model for a ...
    • Conducting a virtual ensemble with a kinect device 

      Rosa-Pujazon, Alejandro; Barbancho-Perez, Isabel; Tardón, Lorenzo J.; Barbancho-Perez, Ana Maria (KTH Royal Institute of Technology Sound and Music Computing Group, 2013)
      This paper presents a gesture-based interaction technique for the implementation of an orchestra conductor and a virtual ensemble, using a 3D camera-based sensor to capture user’s gestures. In particular, a human-computer ...
    • Correction system for polyphonic piano recordings 

      Martin Erdozain, Maria Isabel; Barbancho-Perez, Isabel; Rosa-Pujazon, Alejandro; Barbancho-Perez, Ana Maria (2013-09-17)
      n this paper, a support tool for piano rehearsal is presented. The system analyses a given piano polyphonic recording to find the times, pitch and duration of the notes and figures played, taking into account the ...
    • Designing anisotropy with waveguide subwavelength structures 

      Herrero-Bermello, Alaine; Velasco, Aitor; Schmid, Jens; Cheben, Pavel; Halir, Robert; [et al.] (2018-07-12)
      Silicon sub-wavelength structures have become a versatile design tool for practical, high-performance integrated optical devices, ranging from highly efficient grating couplers to ultra-broadband beam-splitters. Recently, ...
    • Discriminador de frecuencia basado en resonadores “dual-mode” sintonizables 

      Moscoso Mártir, Álvaro; Molina Fernández, Íñigo; Hong, Jiasheng (2013-09)
      In this paper a novel varactor-tuned frequency discriminator that makes use of two tunable dual-mode microstrip resonators is demonstrated. In this circuit, the two tuned modes of the resonators are used independently to ...
    • Diseño de filtros paso-banda mediante cavidades resonantes en tecnología SIW multicapa 

      De Oliva Rubio, José; López Berrocal, Benito; Molina Fernández, Iñigo (2017)
      This document discusses the design of coupled resonators band-pass microwave filters. The resonators are implemented as substrate integrated waveguide (SIW) rectangular cavities, which are piled vertically in a multilayer ...
    • Engineering the optical properties of silicon using sub-wavelength structures 

      Halir, Robert; Ortega Moñux, Alejandro; Maese-Novo, Alejandro; Pérez-Galacho, Diego; Zavargo-Peche, Luis; [et al.] (IEEE Photonics Society, 2013)
      In most integrated optics platforms, including silicon-on-insulator, only minor modifications in refractive index are possible. The geometry of the waveguiding structure is thus the only degree of freedom for the design ...
    • Estudio de la capacidad del canal en enlaces ópticos atmosféricos modelados con distribución M 

      Garrido-Balsells, José María; Jurado-Navas, Antonio; Pari- Ángel, José Francisco; Castillo-Vazquez, Miguel; Puerta-Notario, Antonio (Universidad Santiago de Compostela, 2013-09-13)
      En esta comunicación, ser realiza un estudio de parámetros importantes en la caracterización del comportamiento de enlaces de comunicaciones ópticas atmosféricas. En este sentido, se han derivado expresiones matemáticas ...
    • High performance and small footprint spot size converters based on SWG metamaterial lenses 

      Luque-González, José Manuel; Molina-Fernandez, Iñigo; Ortega-Moñux, Alejandro; Halir, Robert; Schmid, Jens H.; [et al.] (2018-06-28)
      Spot size converters with high expansion ratio are required in a variety of situations. This is the case of non-focusing Silicon on Insulator (SOI) fiber-to-chip grating couplers, which typically require long adiabatic ...
    • Molding silicon waveguide devices with sub-wavelength structures 

      Halir, Robert; Ortega Moñux, Alejandro; Maese-Novo, Alejandro; Pérez-Galacho, Diego; Molina-Fernández, Íñigo; [et al.] (2013-09-18)
    • Multimodal image data fusion for Alzheimer’s Disease diagnosis by Sparse Representation 

      Ortiz-Garcia, Andres (KES, 2014-07-09)
      Alzheimer's Diasese (AD) diagnosis can be carried out by analysing functional or structural changes in the brain. Functional changes associated to neurological disorders can be figured out by positron emission tomography ...
    • 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 ...
    • 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 ...
    • Parametric model of spectral envelope to synthesize realistic intensity variations in singing voice 

      Molina, Emilio; Barbancho-Perez, Isabel; Barbancho-Perez, Ana Maria; Tardón, Lorenzo J. (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 ...
    • Planificación S-TDMA en redes submarinas de comunicaciones inalámbricas 

      Luque-Nieto, Miguel Ángel; Moreno-Roldán, José Miguel; Poncela, Javier; Otero, Pablo; Fernández-Salas, Luís Miguel; [et al.] (Centro Universitario de la Defensa de Marin, 2015)
      Las redes submarinas de sensores son de importancia en la vigilancia y monitorización del medio submarino. Si se desea que las redes sean inalámbricas y con un alcance superior a unos pocos metros, las comunicaciones han ...
    • Re-inventing Multimode Interference Couplers Using Subwavelength Gratings 

      Ortega Moñux, Alejandro; Halir, Robert; Maese Novo, Alejandro; Alonso-Ramos, C.; Zavargo-Peche, Luis; [et al.] (European Physical Society, IEEE, The Optical Society, 2013)
      We use the concept of subwavelength grating (SWG) refractive-index-engineering to propose and experimentally demonstrate a reduced size, slotted 2x2 MMI coupler. We also present an ultra-broadband 2x2 MMI coupler which ...
    • Recognizing complex gestures via natural interfaces 

      Poncela-Gonzalez, Javier; Ben Abdelmoumen, Houda (2018-04-02)
      Natural interfaces have revolutionized the way we interact with computers. They have provided in many fields a comfortable and efficient mechanism that requires no computer knowledge, nor artificial controlling devices, ...
    • Secure Distributed System inspired by Ant Colonies for Road Traffic Management in Emergency Situations 

      Peinado-Dominguez, Alberto; Ortiz-Garcia, Andres; Munilla-Fajardo, Jorge (2013-09-04)
      In this work, we present a distributed system designed for road traffic management. The system is inspired by the behavior of the ant colonies. The distributed design responds to the particular limitations of an emergency ...