ACTIVITIES

• Radio propagation in mobile communication systems.
  
• Development and evaluation of radio propagation models.
  
• Methodology for radio coverage measurements.
  
• Communication channel capacity.
  
• Use of Neural Networks the development of radio propagation models.
  
• Spread Spectrum telecommunications systems.
  
• Modern modulation techniques.
  
• Code division multiplexing and multiple access techniques.
  
• Multi-carrier Modulation.
  
• Interference in mobile communication systems using CDMA techniques.
  
• Interference in Frequency Hopping telecommunications systems.
  
• Conformance Testing for the ERMES and DECT Telecommunications Systems.
  
• Third generation Telecommunications Systems.

ACCESSIBLE INFRASTRUCTURE

• Anechoic Chamber, measuring distance 5 m.
  
• Spectrum Analyzers, HP8595A, HP8593A, R&S FSEK30 (up to 40 GHz).
  
• RF Signal Generators R&S/SMHU, SME 03, SMG, SMHU, SMP04 (up to 40 GHz).
  
• Vector Signal Generator R&S SMIQ03 with Data Generator and Fading Simulator, 12 Paths.
  
• SYMBIONICS DECT Signal Source.
  
• Electromagnetic Radiation Meter: W&G, EMR-300 (E-field Probe 10 MHz - 18 GHz and H-field Probe 27 MHz - 1 GHz).
  
• Field Analyzer: W&G, EFA-3 for EM field measurements from 5 Hz to 30 kHz
  
• Temperature and Humidity Chamber ACS UY330 SP, for tests under extreme conditions.
  
• RF Amplifier VARIAN (1-2 GHz, 15 W).
  
• Transmit/Receive antennas (25 MHz - 40 GHz).
  
• Vehicle/Mobile lab for radio coverage measurements.

SERVICE PROVIDED/PRODUCTS AVAILABLE
Conformance Testing Services for the ERMES receivers and the DECT digital cordless telephones, according to the ETSI standard specifications. Radio coverage measurements for Radio/TV broadcasting, mobile telephony, paging and digital cordless telephony systems. Radio propagation models. Radio coverage maps. RF characteristics measurements for wireless communications systems. Radio Frequency Management and Interference measurements. Studies and measurements for the development and installation of mobile telephony networks (GSM, DCS 1800). Electromagnetic compatibility measurements (EMC) using the anechoic chamber. Measurements of human exposure to electromagnetic fields.

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ACTIVITIES

• Digital telecommunication networks, with emphasis on B-ISDN.
  
• ATM technology.
  
• Network performance evaluation.
  
• Dimensioning/parameterization of network elements.
  
• Algorithms for resource management and traffic control.
  
• Quality of Service (QoS) issues.
  
• Shaping, regulation and/or parameterization of complex traffic streams, including multimedia services, for optimal transmission through the network.
  
• Network management systems, with particular interest in B-ISDN.

ACCESSIBLE INFRASTRUCTURE

• ATM switch, of type FORE ASX200BX, equipped with eight (8) I/O ports at 155Mb/s (class OC-3c, mm fiber used). Four (4) out of the eight ports are housed in a Series "D" module, enabling controlled resource management and measurements on the cell-flow passing though the ports.
  
• Network management platform "SunNet Manager", augmented with capabilities for specialized ATM management (though "ForeThought" software).
  
• Parametric ATM traffic generator and traffic analyzer

SERVICE PROVIDED/PRODUCTS AVAILABLE
Consultation services on the management, traffic control and operation planning, with regard to large-scale broadband networks. Consultation services on modeling, performance aspects and QoS issues for the deployment of complex network-based services.

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ACTIVITIES

• Interactive digital terrestrial television with simultaneous provision of fast Internet and networking services.
  
• Broadband wireless networks for provision of multimedia services, teleconference, teleworking, teletraining, electronic commerce, telemedicιne etc.
  
• System for information and training for persons with special needs.
  

ACCESSIBLE INFRASTRUCTURE

• 42 GHz transmitter
  
• 42 GHz receivers (LNB)
  
• Wireless broadband return channel equipment
  
• MPEG-1 & MPEG-2 encoder
  
• Software for live broadcasting of video

SERVICE PROVIDED/PRODUCTS AVAILABLE

• Provision of digital terrestrial interactive television and broadband services (fast Internet, audio & video clips on Demand etc)
  
• Broadband wireless networks for provision of fast Internet (2 Mb/s) and multimedia services to business and residential users
  
• Virtual wireless video club
  
• Virtual wireless audio club
  
• Information and training for persons with special needs

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ACTIVITIES

• Image processing
  
• Geographical Information Systems
  
• Optical character recognition (OCR)
  
• Spelling correction
  
• Biomedical applications
  
• Decision support and forecasting:
  
• Circuits and systems engineering
  
• Artificial Neural Networks
  
• Visual Perception and Robotics
  
• Face recognition

INFRASTRUCTURE AVAILABLE
Hardware: SUN SPARC-1 Workstation, ETHERNET Network, Matrox Image Processing Card, PCs Pentium.
Software: Neural Network, object recognition and vision software developed in our laboratory, MATLAB 5.2, MATHEMATICA Version 2.1, KHOROS (Visual Image, Signal Processing and GIS), Neural Networks Simulators (Neuralworks, Rochester, SFINX, LVQ, etc), MAPINFO.

SERVICE PROVIDED/PRODUCTS AVAILABLE
Processing and analysis of digital images: analysis and filing of old texts, digitisation and filing of pictures and objects of cultural heritage importance, financial data analysis.

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ACTIVITIES
SKEL performs research at the following technologies:

• Natural language processing
  
• Data mining
  
• Machine learning
  
• Software engineering
  
• User modeling
  
• Image processing
  

that allow the development of intelligent and user friendly information systems (knowledge-based, internationalized, user adaptive, planning & scheduling, intelligent information management). SKEL emphasizes on intelligent information management due to the huge volume of information (multilingual and multimedia) transferred through the Internet and the Digital Libraries.

SERVICE PROVIDED/PRODUCTS AVAILABLE
1. SKEL provides specialized services to third parties in the following areas:

• text categorization in various thematic domains,
  
• information extraction for various events, from Greek and English texts,
  
• filtering of Web pages and e-mail messages with harmful content,
  
• creation of users/clients models according to their interests ,
  
• data mining,
• processing of digitized images for their enhancement / restoration ,
  
• development of expert systems

2. SKEL develops, provides and uses intelligent and user-friendly S/W tools and information systems, such as:

• Language engineering platform
  
• Linguistic processing tools for the Greek language
  
• Linguistic resources for the Greek language
  
• Information extraction system for Greek texts
  
• Tools for the customisation of information extraction systems to new domains
  
• Information filtering system for Greek and English texts
  
• A system for filtering spam e-mail messages
  
• A system for filtering Web pages (FILTERIX)
  
• Web usage mining tools (creating user communities and stereotypes from web usage data)
  
• User modeling server
  
• Expert systems for locating Nickel ore deposits (GEOES) and for loading/unloading chemical carriers (ELS)
  
• Patient scheduling system in hospital laboratories (HOSTES)
  

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ACTIVITIES

• Wireless broadband networks
  
• Automated measurements of electromagnetic radiation.
  
• Design of protocols that support limited mobility in broadband networks.
  
• Design and development of web-based services for broadband networks.
  
• Development of market models for the commercial exploitation of broadband networks.
  
• Augmented Reality systems and internet applications.

ACCESSIBLE INFRASTRUCTURE

• Cellular Broadband WLL networks at 3,5 GHz and speed 12 Mbps.
  
• Anechoic Chamber
  
• Infrastructure for measurement and mapping of electromagnetic radiation measurements.
  
• Laboratory of Biometric Applications
  
• Software development platform
  
• E-Learning Platform

SERVICE PROVIDED/ PRODUCTS AVAILABLE

• Consulting services on wireless broadband networks, e-learing services and biometric applications.
  
• Electromagnetic radiation measuring services.

MARKET SECTROR THAT ADDRESSES

• Telecomm operators, operators of internet-based services, educational institutions and schools, biometrics systems manufacturers and security service providers.

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