Examinando por Materia "REDES DE AREA LOCAL"

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  • Ponencia en Congreso
    Fusion of magnetic and WiFi fingerprints for indoor positioning
    (2018) Grisales Campeón, Juan Pablo; López, Sebastián; de Jesús Meleán, Sergio R.; Moldovan, Horatiu; Parisi, Daniel; Fierens, Pablo Ignacio
    "WiFi received signal strength (RSS) and magnetic field intensity are common measures for indoor localization because they are readily available on most mobile devices. There is a vast literature on smartphone positioning using RSS and it has been widely implemented in real-world scenarios in the last two decades. There is much work done on localization aided by magnetic field measurements. We have recently evaluated the accuracy of RSS-based positioning applying state-of-the-art algorithms to measurements in a well-controlled experimental setup. In this paper, we extend this work to assess the accuracy improvements achievable by fusing WiFi and magnetic field information. We show that accuracy improvements of up to 30% are possible."
  • Ponencia en Congreso
    Indoor positioning based on RSSI of WiFi signals: how accurate can it be?
    (2019-02-20) Grisales Campeón, Juan Pablo; López, Sebastián; de Jesús Meleán, Sergio R.; Parisi, Daniel; Fierens, Pablo Ignacio; Moldovan, Herman
    "There is abundant literature on positioning systems based on WiFi signals. Most of the systems with off-the-shelf hardware use RSSI measurements. In this paper, we try to determine the highest achievable accuracy of such systems. Instead of resorting to a theoretical analysis, e.g., Cram´er-Rao or Ziv-Zakai bounds, we apply state-of-the-art localization algorithms to measurements in a well-controlled experimental setup. We conclude that an accuracy of less than 1 meter seems unrealistic."
  • Tesis de doctorado
    Sistema de transmisión segura punto a punto y multipunto en medios compartidos
    (c2015) Ortega, Alfredo Adrián; Álvarez-Hamelin, Ignacio; Grosz, Diego
    "En esta tesis se presenta una técnica novedosa de transmisión de datos en redes del tipo difusión de manera criptográficamente segura utilizando técnicas de espectro expandido y corrección de errores. Específicamente, el esquema propuesto implementa la multiplexación aleatoria de la información transmitida por clientes que comparten un medio de transmisión"