Browsing by Author "e28febfe-ec2a-40a8-9f33-702c6541c56a"

Now showing items 1-9 of 9

    • A new VLC system for localization in underground mining tunnels 
      Iturralde, Daniel; Seguel, Fabian; Soto, Ismael; Azurdia Meza, César; Khan, Salman (IEEE, 2017)
      In this paper we present a new system that uses new technology that has the ability to transmit data using light emitting diodes (LED) and a photodetector (PD) capable of sensing very soft changes of light. The system ...
    • A novel frequency domain visible light communication (VLC) three-dimensional trilateration system for ... 
      Firoozabadi, Ali Dehghan; Azurdia Meza, César; Soto, Ismael; Seguel, Fabian; Krommenacker, Nicolas; Iturralde, Daniel; Charpentier, Patrick; Zabala-Blanco, David (MDPI AG, 2019)
    • A VLC Channel Model for Underground Mining Environments With Scattering and Shadowing 
      Palacios Jativa, Pablo; Azurdia Meza, César; Sánchez, Iván; Seguel, Fabián; Zabala Blanco, David; Firoozabadi, Ali Dehghan; Gutiérrez, Carlos A.; Soto, Ismael (IEEE-Inst Electrical Electronics Engineers, 2020)
      Underground mining is an industry that preserves the miners' safety and efficiency in their work using wireless communication systems as a tool. In addition to communication links characterized by radio frequency signals, ...
    • An alternative non-cooperative transmission scheme based on coded redundant information 
      Montejo Sánchez, Samuel; Azurdia Meza, César; Souza, Richard Demo; García Fernández, Evelio; Soto, Ismael; Rebelatto, João Luiz (IEEE, 2017)
      Some of the future wireless networks are related tothe provision of higher data rates and lower energy consumption.In contrast to the clear increasing spectrum demand, bandwidthis a limited resource. Cooperative ...
    • Coded Redundant Message Transmission Schemes for Low-Power Wide Area IoT Applications 
      Montejo-Sanchez, Samuel; Azurdia Meza, César; Souza, Richard Demo; Fernandez, Evelio Martin Garcia; Soto, Ismael; Hoeller, Arliones (Institute of Electrical and Electronics Engineers Inc., 2019)
      © 2012 IEEE. We propose a novel transmission scheme, suitable to Internet of Things, which sends coded redundant information in independent packets. The results indicate that this scheme outperforms, in terms of reliability, ...
    • Energy-Efficient transmission strategies with multiple radios in cognitive radio: Beyond rendezvous 
      Montejo Sánchez, Samuel; Azurdia Meza, César; Aranda-Cubillo, Jaime; Demo Souza, Richard; García Fernández, Evelio; Soto, Ismael (Institute of Electrical and Electronics Engineers Inc., 2018)
      Cognitive radio (CR) has emerged as a key technology to deal with the frequency spectrum scarcity. The efficient and opportunistic use of the spectrum requires rapid coordination between the secondary users (SUs). Besides, ...
    • Interference mitigation for visible light communications in underground mines using angle diversity receivers 
      Palacios Játiva, Pablo Geovanny; Román Canizares, Milton; Azurdia Meza, César; Zabala Blanco, David; Dehghan Firoozabad, Ali; Seguel, Fabián; Montejo Sánchez, Samuel; Soto, Ismael (MDPI, 2020)
      This paper proposes two solutions based on angle diversity receivers (ADRs) to mitigate inter-cell interference (ICI) in underground mining visible light communication (VLC) systems, one of them is a novel approach. A ...
    • Novel channel hopping sequence approaches to rendezvous for VANETs 
      Montejo Sánchez, Samuel; Azurdia Meza, César; Bolufé, Sandy; Céspedes Umaña, Sandra; Soto, Ismael; Souza, Richard Demo (IEEE, 2017)
      Vehicularad hocnetworks (VANETs) have emergedas a paradigm for sharing information among vehicles andinfrastructure that has the potential to provide road safety andtravellers comfort. The bandwidth limitation is one of ...
    • Unsupervised method for correlated noise removal for multi-wavelength exoplanet transit observations 
      Dehghan Firoozabadi, Ali; Díaz, Alejandro; Rojo Rubke, Patricio; Soto, Ismael; Mahú Sinclair, Rodrigo; Becerra Yoma, Néstor; Sedaghati, Elyar (IOP Publishing, 2017-07-01)
      Exoplanetary atmospheric observations require an exquisite precision in the measurement of the relative flux among wavelengths. In this paper, we aim to provide a new adaptive method to treat light curves before fitting ...