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   Research Summary

I have been active in the general field of signal processing for communications and networking (SPCOM), applying tools from linear algebra, digital and statistical signal processing, convex optimization, and compressive sampling.

More specifically, I have been active in the following fields:

  • Localization in wireless sensor networks

  • Spectrum sensing for cognitive radio

  • Dynamic resource allocation for cognitive radio

  • Distributed signal processing

  • Underwater Acoustic Communications

  • Communications over time-varying channels

  • Space-time coding

  • Multiple antenna systems

  • Multicarrier communications (e.g., OFDM)

  • Spread spectrum communications (e.g., CDMA) 

  • Digital subscriber line (DSL) technology

 

   Current Research Projects

Sponsors and Partners

FP7 - NOPTILUS

NOPTILUS: Autonomous, Self-Learning, Optimal and Complete Underwater Systems (2011 - 2014)

Current multi-AUV systems are far from being capable of fully autonomously taking over real-life complex situation-awareness operations. As such operations require advanced reasoning and decision-making abilities the current designs have to heavily rely on human operators. The involvement of humans, however, is by no means a guarantee of performance. Within NOPTILUS we take the view that an effective fully-autonomous multi-AUV concept/system, is capable of overcoming these shortcomings, by replacing human-operated operations by a fully autonomous one. To successfully attain such an objective, significant advances are required, involving cooperative & cognitive-based communications and sonars (low level), Gaussian process-based estimation as well as perceptual sensory-motor and learning motion control (medium level), and learning/cognitive-based situation understanding and motion strategies.

More info: http://ens.ewi.tudelft.nl/Research/array/intro.php

Partners:

  • CERTH (Greece)
  • TU Delft (The Netherlands)
  • FEUP (Portugal)
  • ETHZ(Switzerland)
  • TSI (Greece)
  • Imperial College (England)
  • OMST (Portugal)
  • APDL (Portugal)

VICI

VICI: Signal Processing for Self-Organizing Wireless Networks (2009 - 2014)

The goal of this project is to shift from centralized communication networks to distributed self-organizing networks where nodes adapt their procedures (related to spectrum utilization, sensing, information processing, and localization) based on only local information. To develop large self-organizing networks we need cognitive radio devices that are capable of sensing the radio spectrum and adapt accordingly. We further require energy efficient distributed information processing and localization algorithms for large sensor networks.

More info: http://ens.ewi.tudelft.nl/Research/array/vici_sown/intro.php

Users:

  • Philips Research
  • TNO DSS
  • TNO ICT
  • Holst Centre
  • SOWNet

 

D2S2

D2S2: Dependable Distributed Sensor Systems (2010 - 2013)

The D2S2 project aims at developing a framework for programming and operating distributed sensor systems that can be depended on in practical application scenarios. To make an experimental approach feasible, the project focuses on localization and tracking systems in two scenarios that are very relevant to the Dutch society: traffic monitoring and control (static setup) and rescue operations by firefighters and policemen (dynamic setup). A key, innovative feature of the project is the development and use of an advanced miniaturized radar sensor that can operate under a wide range of "difficult" environmental conditions (smoke, fog, etc.) that cannot be handled by typical localization systems in operation today.

More info: http://ens.ewi.tudelft.nl/Research/array/d2s2/intro.php

 

Users:

  • Philips Research
  • Automotive Technology Centre
  • TNO
  •  Landelijke Faciliteit Rampenbestrijding

 

RACUN

RACUN: Robust acoustic communications in underwater networks (2010 - 2011)

This project will develop and demonstrate the capability to establish an underwater ad hoc robust acoustic network for multiple purposes with moving and stationary nodes. Applications are e.g. surveillance and mine reconnaissance using autonomous underwater vehicles (AUVs). A network of underwater nodes should rapidly be deployed in littoral waters. In this project, we will develop modulation and receiver techniques for communication over highly time-varying channels.

More info: http://ens.ewi.tudelft.nl/Research/array/racun/intro.php

Partners:

  • ATLAS (Germany)
  • FWG (Germany)
  • L-3 ELAC Nautik   (Germany)
  • TNO (The Netherlands)
  • Kongsberg (Norway)
  • FFI (Norway)
  • FOI (Sweden)
  • Saab (Sweden)
  • WASS (Italy)
  • CETENA (Italy)

Smart PEAS

Smart PEAS: Smart moving Process Environment Actuators and Sensors (2007 - 2011)

The main idea here is to float sensor-equipped small microelectronic devices inside certain process equipment. Such sensors apply Ultra-Wide Band technology for transmitting large amounts of data with very low power over relative short distances. The proper hydrodynamic design of sensors with respect to size, density, robustness and fluid compatibility enables the spatial and temporal monitoring of process variables all over the vessel. The actuation function may as well be integrated into such devices enabling the dynamic control of different process variables.

More Info: http://ens.ewi.tudelft.nl/Research/array/smartpeas/intro.php

 

Users:

  • TU Delft
  • Siemens
  • TNO
  • Unilever
  • 3UB
  • Westfield
  • NIZO

 

   Past Projects

Sponsors and Partners

VIDI

VIDI: Reliable Wireless Communications over Rapidly Time-varying Channels (2004 - 2009)

Many aspects of communications over time-varying channels will be studied, including channel modeling, channel estimation, channel equalization, multiple-access, and multiple-input multiple-output (MIMO) communications. For each of these topics, the time-varying behavior of the channel will be explicitly taken into account. Attention will be paid to performance as well as computational complexity. The results will provide guidelines for future wireless system design that may even exploit the richness of the time-varying nature of the channels to improve the performance.

More Info: http://ens.ewi.tudelft.nl/Research/array/VIDI/intro.php

Users:

  • TU Delft
  • Philips Research
  • TI-WMC
  • TNO-DSS
  • ASTRON

UCAC

UCAC: UUV Covert Acoustic Communications (2006 - 2008)

The future role of unmanned underwater vehicles (UUVs) is expected to include autonomous tasks in environmental assessment, route survey, mine hunting, and battlefield preparation. Depending on the mission, there will be a need for a robust communication link between the mother ship and the UUV, with a low probability of intercept by third parties. The overall goal of this joint European project is to develop communication algorithms to enable such a covert communication link.

More Info: http://ens.ewi.tudelft.nl/Research/array/intro.php

 

Partners:

  • Saab (Sweden)
  • Reson (Denmark)
  • Patria (Finland)
  • Fincantieri (Italy)
  • TNO (The Netherlands)
  • Kongsberg (Norway)
  • FOI (Sweden)
  • FWG (Germany)
  • FFI (Norway)

 

 

Copyright © 2010-2011 by Geert Leus          Last Update: August 2011

 

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