Now showing items 1-20 of 153

    • A 3-D indoor analysis of path loss modeling using kriging techniques 

      Diago Mosquera, Melissa; Aragón Zavala, Alejandro; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Shubair, Raed M.; Falcone Lanas, Francisco Upna Orcid (IEEE, 2022)   Artículo / Artikulua  OpenAccess
      This study proposes a novel measurement-based method to predict and model three-dimensional (3-D) path loss in indoor scenarios, which first regresses 28 GHz measurements via median path loss modeling and then includes ...
    • A 3D ray launching time-frequency channel modeling approach for UWB ranging applications 

      Otim, Timothy Upna; López Iturri, Peio Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Bahillo, Alfonso; Falcone Lanas, Francisco Javier Upna Orcid (IEEE, 2020)   Artículo / Artikulua  OpenAccess
      Ultrawideband (UWB) has the ability to achieve decimetre level of ranging accuracy, hence, its wider usage nowadays in the field of positioning. In spite of the attractiveness of UWB, its performance is strongly dependent ...
    • 5G spatial modeling of personal RF-EMF assessment within aircrafts cabin environments 

      Celaya Echarri, Mikel; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Rodríguez Corbo, Fidel Alejandro; López Iturri, Peio Upna Orcid; Shubair, Raed M.; Ramos González, Victoria; Falcone Lanas, Francisco Upna Orcid (IEEE, 2022)   Artículo / Artikulua  OpenAccess
      Recently, new wireless communication systems within aircrafts cabins have drawn higher attention due to the growing demand of passenger services and applications and their corresponding requirements and constraints. In ...
    • Aggregator to electric vehicle LoRaWAN based communication analysis in vehicle-to-grid systems in smart cities 

      Klaina, Hicham Upna; Picallo Guembe, Imanol Upna Orcid; López Iturri, Peio Upna Orcid; Astrain Escola, José Javier Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (IEEE, 2020)   Artículo / Artikulua  OpenAccess
      Recently, there has been growing attention to the power grid management due to the increasing concerns on global warming. With the advancement in electric vehicles (EV) industry and the evolution in batteries, EVs become ...
    • All-metallic ε-near-zero (ENZ) lens based on ultra-narrow hollow rectangular waveguides: experimental results 

      Orazbayev, Bakhtiyar Upna Orcid; Torres Landívar, Víctor Upna; Pacheco-Peña, Víctor Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid; Teniente Vallinas, Jorge Upna Orcid; Beruete Díaz, Miguel Upna Orcid; Sorolla Ayza, Mario Upna; Navarro Cía, Miguel Upna Orcid; Engheta, Nader (IEEE, 2014)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Here we perform numerical and experimental investigation of plano-concave all-metallic ε-near-zero (ENZ) lens with operational frequency f = 144 GHz. The ENZ lens is achieved by stacking an array of narrow hollow rectangular ...
    • Análisis del comportamiento de esquemas de modulación adaptativos en LTE 

      Torres Landívar, Víctor Upna; Esparza Alfaro, Fermín Upna; Falcone Lanas, Francisco Javier Upna Orcid (2009)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work, the behaviour of several modulation schemes used in 3GPP R8 or Long Term Evolution (LTE) Systems is analyzed. In order to increase the capacity of future mobile networks, high order modulation schemes like ...
    • Analysis and description of HOLTIN service provision for AECG monitoring in complex indoor environments 

      Led Ramos, Santiago Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Aguirre Gallego, Erik Upna Orcid; Martínez de Espronceda Cámara, Miguel Upna Orcid; Serrano Arriezu, Luis Javier Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (MDPI, 2013)   Artículo / Artikulua  OpenAccess
      In this work, a novel ambulatory ECG monitoring device developed in-house called HOLTIN is analyzed when operating in complex indoor scenarios. The HOLTIN system is described, from the technological platform level to its ...
    • Analysis and implementation of wireless communications systems and IoT with human body interference in inhomogeneous environments 

      Picallo Guembe, Imanol Upna Orcid; Klaina, Hicham Upna; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Vázquez Alejos, Ana; López iturri, Peio Upna Orcid; Falcone Lanas, Francisco Upna Orcid (2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The Integration of wireless communication systems is one of the main drivers of the development of the future connected society. However, this will cause challenges due to the non-static channel effect and interference ...
    • Analysis of bluetooth-based wireless sensor networks performance in hospital environments 

      López Iturri, Peio Upna Orcid; Led Ramos, Santiago Upna Orcid; Aguirre Gallego, Erik Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Serrano Arriezu, Luis Javier Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (MDPI, 2016)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work, a method to analyze the performance of Bluetooth-based Wireless Sensor Networks (WSN) deployed within hospital environments is presented. Due to the complexity that this kind of scenarios exhibit in terms of ...
    • Analysis of gyrobianisotropic media effect on the input impedance, field distribution and mutual coupling of a printed dipole antenna 

      Bouknia, Mohamed Lamine; Zebiri, Chemseddine; Sayad, Djamel; Elfergani, Issa; Matin, Mohammad; Alibakhshikenari, Mohammad; Alharbi, Abdullah G.; Hu, Yim Fun; Abd-Alhameed, Raed; Rodriguez, Jonathan; Falcone Lanas, Francisco Upna Orcid; Limiti, Ernesto (Springer Nature, 2022)   Artículo / Artikulua  OpenAccess
      In this paper, we present an analytical study for the investigation of the effects of the magnetoelectric elements of a reciprocal and nonreciprocal bianisotropic grounded substrate on the input impedance, resonant length ...
    • Analysis of inter-train wireless connectivity to enable context aware rail applications 

      Picallo Guembe, Imanol Upna Orcid; López Iturri, Peio Upna Orcid; Celaya Echarri, Mikel; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Astrain Escola, José Javier Upna Orcid; Falcone Lanas, Francisco Upna Orcid (Springer, 2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Train systems are fundamental players within multi-modal transit systems, providing efficient transportation means for passengers and goods. In the framework of Smart Cities and Smart Regions, providing context aware ...
    • Analysis of low power wide area network wireless technologies in smart agriculture for large-scale farm monitoring and tractor communications 

      Klaina, Hicham; Picallo Guembe, Imanol Upna Orcid; López Iturri, Peio Upna Orcid; Campo-Bescós, Miguel Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Aghzout, Otman; Vázquez Alejos, Ana; Falcone Lanas, Francisco Javier Upna Orcid (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
      In this paper, the assessment of multiple scenario cases for large-scale farm monitoring using Low-Power Wide-Area Network (LPWAN) based near-ground sensor nodes with the interaction of both tractors and farmers are ...
    • Analysis of radio wave propagation for ISM 2.4 GHz wireless sensor networks in inhomogeneous vegetation environments 

      Azpilicueta Fernández de las Heras, Leyre Upna Orcid; López Iturri, Peio Upna Orcid; Aguirre Gallego, Erik Upna Orcid; Mateo Zozaya, Ignacio; Astrain Escola, José Javier Upna Orcid; Villadangos Alonso, Jesús Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (MDPI, 2014)   Artículo / Artikulua  OpenAccess
      The use of wireless networks has experienced exponential growth due to the improvements in terms of battery life and low consumption of the devices. However, it is compulsory to conduct previous radio propagation analysis ...
    • Analysis of radio wave propagation for ISM 2.4GHz wireless sensor networks in inhomogeneous vegetation environments 

      Azpilicueta Fernández de las Heras, Leyre Upna Orcid; López Iturri, Peio Upna Orcid; Aguirre Gallego, Erik Upna Orcid; Astrain Escola, José Javier Upna Orcid; Villadangos Alonso, Jesús Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (2014)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The use of wireless networks has been extended in an exponential growing due to the improvement in terms of battery life and low consumption of the devices. However, it is highly important to conduct previous radio propagation ...
    • Analysis of the combinatory effect of uniaxial electrical and magnetic anisotropy on the input impedance and mutual coupling of a printed dipole antenna 

      Bouknia, Mohamed Lamine; Zebiri, Chemseddine; Sayad, Djamel; Elfergani, Issa; Alibakhshikenari, Mohammad; Rodriguez, Jonathan; Abd-Alhameed, Raed; Falcone Lanas, Francisco Javier Upna Orcid; Limiti, Ernesto (IEEE, 2021)   Artículo / Artikulua  OpenAccess
      The main objective of this work is to investigate the combinatory effects of both uniaxial magnetic and electrical anisotropies on the input impedance, resonant length and the mutual coupling between two dipoles printed ...
    • Analysis of wireless sensor network topology and estimation of optimal network deployment by deterministic radio channel characterization 

      Aguirre Gallego, Erik Upna Orcid; López Iturri, Peio Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Astrain Escola, José Javier Upna Orcid; Villadangos Alonso, Jesús Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (MDPI, 2015)   Artículo / Artikulua  OpenAccess
      One of the main challenges in the implementation and design of context-aware scenarios is the adequate deployment strategy for Wireless Sensor Networks (WSNs), mainly due to the strong dependence of the radiofrequency ...
    • Analysis, characterization and modeling of interference sources on wireless communication systems in complex indoor scenarios 

      López Iturri, Peio Upna Orcid (2017)   Tesis doctoral / Doktoretza tesia  OpenAccess
      This research work presents a novel methodology of assessing wireless interferences on Wireless Sensor Networks (WSN) by the aid of an in-house developed 3D Ray Launching method, which is a novel deterministic approach ...
    • Antenna mutual coupling suppression over wideband using embedded periphery slot for antenna arrays 

      Alibakhshikenari, Mohammad; Virdee, Bal S.; Shukla, Panchamkumar; See, Chan H.; Abd-Alhameed, Raed; Khalily, Mohsen; Falcone Lanas, Francisco Javier Upna Orcid; Limiti, Ernesto (MDPI, 2018)   Artículo / Artikulua  OpenAccess
      This paper presents a new approach to suppress interference between neighbouring radiating elements resulting from surface wave currents. The proposed technique will enable the realization of low-profile implementation of ...
    • Antenna on chip (AoC) design using metasurface and SIW technologies for THz wireless applications 

      Althuwayb, Ayman Abdulhadi; Alibakhshikenari, Mohammad; Virdee, Bal S.; Benetatos, Harry; Falcone Lanas, Francisco Javier Upna Orcid; Limiti, Ernesto (MDPI, 2021)   Artículo / Artikulua  OpenAccess
      This paper presents the design of a high-performance 0.45-0.50 THz antenna on chip (AoC) for fabrication on a 100-micron GaAs substrate. The antenna is based on metasurface and substrate-integrated waveguide (SIW) technologies. ...
    • Automated reconfigurable antenna impedance for optimum power transfer 

      Alibakhshikenari, Mohammad; Virdee, Bal S.; See, Chan H.; Abd-Alhameed, Raed; Falcone Lanas, Francisco Javier Upna Orcid; Limiti, Ernesto (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This paper presents an approach to implement an automatically tuning antenna for optimising power transfer suitable for software defined radio (SDR). Automatic tuning is accomplished using a closed loop impedance tuning ...