Browsing Reprints by Issue Date

Now showing items 401-420 of 548

    • Decision tree-based adaptive modulation for underwater acoustic communications 

      Pelekanakis, Konstantinos; Cazzanti, Luca; Zappa, Giovanni; Alves, João (CMRE, 2017/11)
      Underwater acoustic channels are characterised by non-stationary fading statistics and consequently, a modulation scheme optimally designed for a specific fading model will underperform when the channel statistics ...

    • Fostering the use of JANUS in operationally-relevant underwater applications 

      Petroccia, Roberto; Alves, João; Zappa, Giovanni (CMRE, 2017/11)
      This paper presents the use of JANUS in operationally-relevant underwater applications. JANUS is an open, simple and robust digital coding technology currently in process to become a NATO standard. Two underwater scenarios ...

    • Automated port traffic statistics: from raw data to visualization 

      Cazzanti, Luca; Davoli, Antonio; Millefiori, Leonardo (CMRE, 2017/11)
      We describe how we leveraged best practices in big data processing pipeline design and visual analytics to prototype the Maritime Patterns-of-Life Information Service (MPoLIS), an information product currently under ...

    • Multi-view SAS image classification using deep learning 

      Williams, David P.; Dugelay, Samantha (CMRE, 2017/11)
      A new approach is proposed for multi-view classification when sonar data is in the form of imagery and each object has been viewed an arbitrary number of times. An image-fusion technique is employed in conjunction with a ...

    • Supporting AUV localisation through next generation underwater acoustic networks: results from the field 

      Munafó, Andrea; Furfaro, Thomas C.; Ferri, Gabriele; Alves, João (CMRE, 2017/11)
      This work describes how the localisation of autonomous underwater vehicles can be supported through net-worked acoustic communication. The localisation approach in-cludes timing information within acoustic messages to ...

    • Distributed information fusion in multistatic sensor networks for underwater surveillance 

      Braca, Paolo; Goldhahn, Ryan A.; Ferri, Gabriele; LePage, Kevin D. (CMRE, 2017/11)
      Surveillance in antisubmarine warfare has traditionally been carried out by means of submarines or frigates with towed arrays. These techniques are manpower intensive. Alternative approaches have recently been suggested ...

    • Adaptive underwater sonar surveys in the presence of strong currents 

      Williams, David P.; Baralli, Francesco; Micheli, Michele; Vasoli, Simone (CMRE, 2017/11)
      We consider the task of conducting underwater surveys with a sonar-equipped autonomous underwater vehicle (AUV) in environments with strong currents. More specifically, this topic is addressed in the context of mine ...

    • Moving JANUS forward: a look into the future of underwater communications interoperability 

      Alves, João; Furfaro, Thomas C.; LePage, Kevin D.; Pelekanakis, Konstantinos; Petroccia, Roberto; Zappa, Giovanni (CMRE, 2017/11)
      In the past 8 years, the Centre for Maritime Research and Experimentation (CMRE) has developed, tested and promoted JANUS - a robust and simple modulation and coding scheme to be used as the first standard to support ...

    • Camelot - localization beacon system 

      Stipanov, Marin; Fioravanti, Stefano (CMRE, 2019-05)
      C2 Advanced Multi-Domain Environment And Live Observation Technologies (CAMELOT) is a H2020 project intended to develop and demonstrate different advanced command and control service modules for multiple platform domains ...

    • Weather-routing system based on METOC navigation risk assessment 

      Fabbri, Tommaso; Vicen Bueno, Raul (CMRE, 2019/05)
      This paper presents a novel weather-routing system based on a multi-criteria setup. The set of 3 conflicting criteria is: travel time, ship navigation added resistance (caused by wind and waves), and navigation risk/safety. ...

    • Doppler passive fathometry 

      Harrison, Chris H. (CMRE, 2019/05)
      Passive fathometry is a technique whereby broadband ambient ocean noise received on an array of hydrophones is averaged and cross-correlated to produce a sub-bottom profile [Siderius, Harrison, and Porter (2006). J. Acoust. ...

    • A paradigm shift of interoperable submarine rescue operations: the usage of JANUS during the Dynamic Monarch 2017 exercise 

      Alves, João; Petroccia, Roberto; Grati, Alberto; Jourden, Nicolas; Vitagliano, Gennaro; Santos Garcia, Paulo; Nieves Prieto, Jose D.; Borges De Sousa, João (CMRE, 2019/05)
      The NATO Centre for Maritime Research and Experimentation (CMRE) participated for the first time in the Dynamic Monarch submarine rescue exercise, bringing to the operational players a new interoperable digital underwater ...

    • Detecting anomalous deviations from standard maritime routes using the Ornstein-Uhlenbeck process 

      D'Afflisio, Enrica; Braca, Paolo; Millefiori, Leonardo; Willett, Peter K. (CMRE, 2019/05)
      A novel anomaly detection procedure based on the Ornstein-Uhlenbeck (OU) mean-reverting stochastic process is presented. The considered anomaly is a vessel that deviates from a planned route, changing its nominal velocity ...

    • Hybrid Bernoulli filtering for detection and tracking of anomalous path deviations 

      Forti, Nicola; Millefiori, Leonardo; Braca, Paolo (CMRE, 2019/05)
      This paper presents a solution to the problem of sequential joint anomaly detection and tracking of a target subject to switching unknown path deviations. Based on a dynamic model described by Ornstein- Uhlenbeck (OU) ...

    • A modem design for underwater acoustic networking in the High North 

      Pelekanakis, Konstantinos; Green, Dale; Fountzoulas, Yannis; Blouin, Stephane (CMRE, 2019/05)
      We design a software modem for long range underwater acoustic communications in ice-covered oceans. The modem is equipped with three coded modulation schemes achieving 1.8, 21.4 and 96.2 bps, respectively. In addition, we ...

    • An ordered family of consistency measures of belief functions 

      Ben Abdallah, Nadia; Jousselme, Anne-Laure; Pichon, Fréderic (CMRE, 2019/05)
      We propose a family of measures of consistency (and induced conflict) derived from a definition of consistent belief functions introduced previously. Besides satisfying the desired properties of monotonicity, boundedness, ...

    • On adaptive modulation for low SNR underwater acoustic communications 

      Pelekanakis, Konstantinos; Cazzanti, Luca (CMRE, 2019/05)
      This paper deals with adaptive underwater acoustic (UWA) communications where the receiver must operate at low signal-to-noise ratios (SNRs). The proposed modem is equipped with a set of direct sequence spread spectrum ...

    • Toward the development of secure underwater acoustic networks 

      Lal, Chhagan; Petroccia, Roberto; Conti, Mauro; Alves, João (CMRE, 2019/05)
      Underwater acoustic networks (UANs) have been recognized as an enabling technology for various applications in the maritime domain. The wireless nature of the acoustic medium makes UANs vulnerable to various malicious ...

    • Information and source quality ontology in support of maritime situational awareness 

      Camossi, Elena; Jousselme, Anne-Laure (CMRE, 2019/05)
      To support situation awareness, the benefit of using a variety of sources is undeniable although it brings additional challenges related to possible conflicting information, heterogeneity in data formats, semantics, ...

    • Deployment of a persistent underwater acoustic sensor network: the CommsNet17 experience 

      Petroccia, Roberto; Sliwka, Jan; Grati, Alberto; Grandi, Vittorio; Guerrini, Piero; Munafò, Andrea; Stipanov, Marin; Alves, João; Been, Robert (CMRE, 2019/05)
      This paper presents the experimental activities performed by the NATO STO Centre for Maritime Research and Experimentation (CMRE) during the CommsNet17 trial where a persistent Underwater Acoustic Sensor Network (UASN) was ...