Browsing by Author "Alves, João"

Now showing items 1-20 of 24

    • A data-driven control strategy in synergy with continuous active sonar for littoral underwater surveillance 

      Ferri, Gabriele; Munafó, Andrea; Alves, João; LePage, Kevin D. (CMRE, 2017/11)
      In this work, we describe a data-driven Mission Management Layer (MML) running on-board AUVs which manages the phases of a littoral surveillance mission and exploits the characteristics of Continuous Active Sonar (CAS) ...

    • An adaptive cross-layer routing protocol for underwater acoustic networks 

      Petroccia, Roberto; Pelekanakis, Konstantinos; Alves, João; Fioravanti, Stefano; Blouin, Stephane; Pecknold, Sean (2019/05)
      This short paper presents an adaptive cross-layer routing protocol for Underwater Acoustic Networks (UANs). The proposed solution, termed NADIR for Network Aware aDaptIve Routing, is fully distributed and self-adaptive. ...

    • Analysis of JANUS and underwater telephone capabilities and co-existence 

      Alves, João; Fricke, Justus Ch. (CMRE, 2019/06)
      This document aims at offering a concise look into the co-existence of Underwater Telephone and JANUS digital communication methods. This topic is of particular interest as both methods (one a well-established STANAG and ...

    • Autonomous networked anti-submarine warfare research and development at CMRE 

      LePage, Kevin D.; Goldhahn, Ryan A.; Alves, João; Strode, Christopher; Braca, Paolo; Ferri, Gabriele; Munafò, Andrea; Oddone, Manlio; Sildam, Jüri; Baralli, Francesco; Biagini, Stefano; Canepa, Gaetano; Colombo, Marco; Grandi, Vittorio; Grenon, Gabriel; Mazzi, Marco; Micheli, Michele; Parisi, Gerardo; Saia, Paolo; Vermeij, Arjan; Zappa, Giovanni (CMRE, 2019/06)
      CMRE has been evaluating the potential of autonomous networked ASW using underwater vehicles through a program of sonar signal processing, underwater communications, navigation and robotic behavior developments and at-sea ...

    • A communications and relative navigation architecture for underwater vehicle coordination 

      Furfaro, Thomas C.; Alves, João (CMRE, 2019/06)
      This paper presents an implementation of a communications stack for underwater communications and relative localisation. The application scenario, under the auspices of the EC MORPH project, is described. The high-level ...

    • Cooperative robotic networks for underwater surveillance: an overview 

      Ferri, Gabriele; Munafò, Andrea; Tesei, Alessandra; Braca, Paolo; Meyer, Florian; Pelekanakis, Konstantinos; Petroccia, Roberto; Alves, João; Strode, Christopher; LePage, Kevin D. (CMRE, 2019/06)
      Underwater surveillance has traditionally been carried out by means of surface and undersea manned vessels equipped with advanced sensor systems. This approach is often costly and manpower intensive. Marine robotics is an ...

    • Current regulatory issues in the usage of autonomous underwater vehicles 

      Ferreira, Fausto; Alves, João; Leporati, Carolina; Bertolini, Andrea; Bargelli, Elena (CMRE, 2019/05)
      Autonomous Surface Vehicles (ASVs) are becoming increasingly popular for a large number of applications from oceanography to border protection and shipping. In particular, the advent of long-term ASVs allows for months-long ...

    • 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 ...

    • 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 ...

    • Development of a software-defined and cognitive communications architecture at CMRE 

      Petroccia, Roberto; Zappa, Giovanni; Furfaro, Thomas C.; Alves, João; D'Amaro, Luigi (2019/05)
      This paper presents an overview of the functionalities of the Cognitive Communications Architecture (CCA) that is currently under development at the NATO Science and Technology Organisation (STO) Centre for Maritime Research ...

    • Dynamic placement of a constellation of surface buoys for enhanced underwater positioning 

      Munafò, Andrea; Sliwka, Jan; Alves, João (CMRE, 2019/06)
      This paper addresses the challenge of dynamically adapting the location of the nodes in an acoustic network to optimise the localisation performance of Autonomous Underwater Vehicles (AUVs) operating in the area. A dynamic ...

    • Experiments with multi-vehicle operations: the Rapid Environmental Picture Atlantic exercise 2014 

      Borges de Sousa, João; Pereira, João; Alves, João; Galocha, Madaleno; Pereira, Baptista; Lourenço, Claro (CMRE, 2019/06)
      The paper describes the Rapid Environmental Picture Atlantic exercise 2014 (REP14-Atlantic), with special focus on the experiments with autonomous underwater, surface and air vehicles, and discusses how large scale ...

    • 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 ...

    • Increasing the operational safety of autonomous underwater vehicles using the JANUS communication standard 

      Ferreira, Fausto; Petroccia, Roberto; Alves, João (CMRE, 2019/05)
      Increasing the operational safety of Autonomous Underwater Vehicles (AUVs) is necessary to fully explore their potential. Currently, AUV operations are limited by several constrains including the need to guarantee no ...

    • JANUS-based services for operationally relevant underwater applications 

      Petroccia, Roberto; Alves, João; Zappa, Giovanni (CMRE, 2017/11)
      This paper presents the design, test, and experimentation at sea of four JANUS-based services for operationally relevant underwater applications: 1) first contact and language switching; 2) transmission of automatic ...

    • Liability issues of unmanned surface vehicles 

      Ferreira, Fausto; Alves, João; Bertolini, Andrea; Bargelli, Elena (CMRE, 2019/05)

    • 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 ...

    • NEMO: An architecture for software communications research in the maritime domain 

      Vermeij, Arjan; Furfaro, Thomas C.; Alves, João (CMRE, 2019/06)
      This paper presents a high-level overview of NEMO, an implementation of a communications research software workspace with special focus on application scenarios involving underwater (e.g. acoustic), and other maritime ...

    • 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 ...

    • Recent technological advances in underwater autonomy 

      Maguer, Alain; Been, Robert; Tesei, Alessandra; Alves, João; Grandi, Vittorio; Biagini, Stefano (2019/05)
      Underwater Unmanned systems (or more precisely systems of systems) will definitely play an important role in future maritime surveillance and environmental data collection. For many years, the NATO Centre for Maritime ...