Now showing items 1-20 of 36

    • A cost-effective IoT system for monitoring Indoor radon gas concentration 

      Blanco, Óscar; Fernández-Caramés, Tiago M.; Fraga-Lamas, Paula; Castedo, Luis (M D P I AG, 2018-07-08)
      [Abstract] Radon is a noble gas originating from the radioactive decay chain of uranium or thorium. Most radon emanates naturally from the soil and from some building materials, so it can be found in many places around the ...
    • A Deep Learning-Based Strategy to Predict Self-Interference in SFN DTT 

      Pereira-Ruisánchez, Dariel; Pérez-Adán, Darian; Castedo, Luis (MDPI, 2021)
      [Abstract] A deep learning-based strategy for the analysis of the self-interference in single frequency networks (SFNs) for digital terrestrial television (DTT) broadcasting is considered. Several laboratory measurements ...
    • A MATLAB Interface for Analyzing Conformal Arrays Composed of Polarized Heterogeneous Elements 

      Brégains, Julio; García-Naya, José A.; González-López, Miguel; Castedo, Luis (Institute of Electrical and Electronics Engineers, 2011-10)
      [Abstract] As an extension and improvement of a previous work, this paper presents a graphical interface designed with MATLAB®, which is capable of representing both the spatial and electrical configurations of a conformal ...
    • A Practical Evaluation of a High-Security Energy-Efficient Gateway for IoT Fog Computing Applications 

      Suárez-Albela, Manuel; Fernández-Caramés, Tiago M.; Fraga-Lamas, Paula; Castedo, Luis (M D P I AG, 2017-08-29)
      [Abstract] Fog computing extends cloud computing to the edge of a network enabling new Internet of Things (IoT) applications and services, which may involve critical data that require privacy and security. In an IoT fog ...
    • A Review on Internet of Things for Defense and Public Safety 

      Fraga-Lamas, Paula; Fernández-Caramés, Tiago M.; Suárez-Albela, Manuel; Castedo, Luis; González-López, Miguel (Multidisciplinary Digital Publishing Institute, 2016)
      [Abstract], The Internet of Things (IoT) is undeniably transforming the way that organizations communicate and organize everyday businesses and industrial procedures. Its adoption has proven well suited for sectors that ...
    • A WiMAX Conformal Broad-Beam Antenna 

      Brégains, Julio; Castedo, Luis; Ares Pena, F. J. (Institute of Electrical and Electronics Engineers, 2010-12)
      [Abstract] The numerical model of a very simple conformal antenna, prepared to work in the 3.4 to 3.6 GHz WiMAX range, is presented. The pattern radiated by the proposed antenna displays high gain and excellent linear ...
    • Alternatives for Locating People Using Cameras and Embedded AI Accelerators: A Practical Approach 

      Carro Lagoa, Ángel; Barral Vales, Valentín; González-López, Miguel; Escudero, Carlos J.; Castedo, Luis (MDPI, 2021)
      [Abstract] Indoor positioning systems usually rely on RF-based devices that should be carried by the targets, which is non-viable in certain use cases. Recent advances in AI have increased the reliability of person detection ...
    • An Electricity Price-Aware Open-Source Smart Socket for the Internet of Energy 

      Blanco, Óscar; Fernández-Caramés, Tiago M.; Fraga-Lamas, Paula; Castedo, Luis (M D P I AG, 2017-03-21)
      [Abstracts] The Internet of Energy (IoE) represents a novel paradigm where electrical power systems work cooperatively with smart devices to increase the visibility of energy consumption and create safer, cleaner and ...
    • Analog Video Encoding and Quality Evaluation 

      Balsa, José; Fresnedo, Óscar; García-Naya, José A.; Domínguez-Bolaño, Tomás; Castedo, Luis (M D P I AG, 2019-07-23)
      [Abstract] The most widespread analog video encoding systems in the literature are based on the use of the 2D and 3D DCT. These systems use both transformations indistinctly without assessing their suitability. In this ...
    • Analysis, Design and Empirical Validation of a Smart Campus Based on LoRaWAN 

      Fraga-Lamas, Paula; Celaya-Echarri, Mikel; López Iturri, Peio; Fernández-Caramés, Tiago M.; Azpilicueta, Leyre; Aguirre, Erik; Suárez Albela, Manuel; Falcone, Francisco; Castedo, Luis (MDPI, 2019)
      [Abstract] Internet of Things (IoT) applications for smart environments demand challenging requirements for wireless networks in terms of security, coverage, availability, power consumption, and scalability. The technologies ...
    • Clock frequency Impact on the performance of high-security cryptographic cipher suites for energy-efficient resource-constrained IoT devices 

      Suárez-Albela, Manuel; Fraga-Lamas, Paula; Castedo, Luis; Fernández-Caramés, Tiago M. (M D P I AG, 2018-12-20)
      [Abstract] Modern Internet of Things (IoT) systems have to be able to provide high-security levels, but it is difficult to accommodate computationally-intensive cryptographic algorithms on the resource-constrained hardware ...
    • Coded Aperture Hyperspectral Image Reconstruction 

      García-Sánchez, Ignacio; Fresnedo, Óscar; González-Coma, José P.; Castedo, Luis (MDPI, 2021)
      [Abstract] In this work, we study and analyze the reconstruction of hyperspectral images that are sampled with a CASSI device. The sensing procedure was modeled with the help of the CS theory, which enabled efficient ...
    • Design and Experimental Validation of a LoRaWAN Fog Computing Based Architecture for IoT Enabled Smart Campus Applications 

      Fraga-Lamas, Paula; Celaya-Echarri, Mikel; López Iturri, Peio; Castedo, Luis; Azpilicueta, Leyre; Aguirre, Erik; Suárez-Albela, Manuel; Falcone, Francisco; Fernández-Caramés, Tiago M. (MDPI AG, 2019-07-26)
      [Abstract] A smart campus is an intelligent infrastructure where smart sensors and actuators collaborate to collect information and interact with the machines, tools, and users of a university campus. As in a smart city, ...
    • Design, Implementation and Practical Evaluation of an IoT Home Automation System for Fog Computing Applications Based on MQTT and ZigBee-WiFi Sensor Nodes 

      Froiz-Míguez, Iván; Fernández-Caramés, Tiago M.; Fraga-Lamas, Paula; Castedo, Luis (M D P I AG, 2018-08-13)
      [Abstract] In recent years, the improvement of wireless protocols, the development of cloud services and the lower cost of hardware have started a new era for smart homes. One such enabling technologies is fog computing, ...
    • FDD Channel Estimation Via Covariance Estimation in Wideband Massive MIMO Systems 

      González-Coma, José P.; Suárez-Casal, Pedro; Castro-Castro, Paula-María; Castedo, Luis (M D P I AG, 2019-02-10)
      [Abstract] A method for channel estimation in wideband massive Multiple-Input Multiple-Output systems using hybrid digital analog architectures is developed. The proposed method is useful for Frequency-Division Duplex at ...
    • FDD Channel Estimation Via Covariance Estimation in Wideband Massive MIMO Systems 

      González-Coma, José P.; Suárez-Casal, Pedro; Castro-Castro, Paula-María; Castedo, Luis (M D P I AG, 2020-02-10)
      [Abstract] A method for channel estimation in wideband massive Multiple-Input Multiple-Output systems using hybrid digital analog architectures is developed. The proposed method is useful for Frequency-Division Duplex at ...
    • Image Transmission: Analog or Digital? 

      Balsa González, José Francisco; Domínguez-Bolaño, Tomás; Fresnedo, Óscar; García-Naya, José A.; Castedo, Luis (M D P I AG, 2018-09-18)
      [Abstract] Evaluation and comparison of analog and digital wireless transmission systems.
    • Impact of Time-Modulated Arrays on the BER of Linear Digital Modulations 

      Maneiro-Catoira, Roberto; Brégains, Julio; García-Naya, José A.; Castedo, Luis (Taylor & Francis, 2015-08-21)
      [Abstract] Time modulation provides a simple way to control the power radiation pattern of an antenna array. By appropriately selecting the parameters of a Time-Modulated Array (TMA) it is possible to obtain a reconfigurable ...
    • Intelligent Reflective Surfaces for Wireless Networks: An Overview of Applications, Approached Issues, and Open Problems 

      Pérez-Adán, Darian; Fresnedo, Óscar; González-Coma, José P.; Castedo, Luis (MDPI, 2021)
      [Abstract] An intelligent reflective surface (IRS) is a novel and revolutionizing communication technology destined to enable the control of the radio environment. An IRS is a real-time controllable reflectarray with a ...
    • JSCC-Cast: A Joint Source Channel Coding Video Encoding and Transmission System with Limited Digital Metadata 

      Balsa, José; Fresnedo, Óscar; García-Naya, José A.; Domínguez-Bolaño, Tomás; Castedo, Luis (MDPI, 2021)
      [Abstract] This work considers the design and practical implementation of JSCC-Cast, a comprehensive analog video encoding and transmission system requiring a reduced amount of digital metadata. Suitable applications for ...