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    Item type:Publication, Access status: with files ,
    Resilience against shipping noise and interference of the AHOI acoustic underwater modem
    (2019-09)
    Steinmetz, Fabian
    ;
    Renner, Bernd-Christian
    Underwater Wireless Sensor Networks (UWSNs) and micro Autonomous Underwater Vehicles (µAUVs) enable diverse underwater monitoring and service applications; e. g., observation of water quality or identification of pollution. Reliable underwater communication for data transmission between sensors, µAUVs and base stations is required. The smartPORT acoustic underwater modem AHOI is a small, low-power and low-cost modem, which was developed for these applications. This paper evaluates the modem’s resilience against shipping noise and packet interference in UWSNs. At first, noise and interference sources are presented, followed by a short description of the modems’s countermeasures. At last, simulated noise of ships and Autonomous Underwater Vehicles (AUVs) with different distances to the noise source were added to the communication signals and evaluated. And in addition, packet interference was simulated and evaluated in a real-world scenario.
    Publicationtype: Conference Paper
      84  150
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    Towards structural health monitoring using vibro-acoustic modulation in the real world
    (2019-09)
    Oppermann, Peter
    ;
    Dorendorf, Lennart
    ;
    Boll, Benjamin
    ;
    Gagani, Abedin I.
    ;
    Lalkovski, Nikolay
    In this paper we explore the opportunities and challenges of deploying a Wireless Sensor Network to monitor the structural health of civil infrastructure using Vibro-Acoustic Modulation. The fundamentals of the method are explained and the challenges for a sensor network in a practical implementation are investigated. Ideas and requirements for the sensor nodes are analyzed and presented.
    Publicationtype: Conference Paper
      925  143