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RESEARCH ACTIVITIES
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The VLSI Laboratory has extensive experience in the research
fields of integrated circuits and systems and digital signal and image
processing systems. The results of these activities are frequently presented
in international conferences and are published in numerous scientific and
engineering journals. Beyond the postgraduate, educational, and research
activities, performed in the context of the doctoral program, the scientists
and engineers of the Laboratory also aim to facilitate the proliferation
of the use of Application-Specific Integrated Circuits (ASICs) in Greek
industry. The main topics of research activities of the Laboratory follow.
Chip Design
Effort spent in this field, spans all different levels in the development
of a chip. In this context, digital filters that meet a variety of specifications
and audio and image digital signal processors for commercial and industrial
applications have been developed. In particular, research in this field
focuses on designing
1. low power dissipation circuits,
2. high speed circuits, and
3. circuits for computer network protocols.
Also, libraries of VLSI module generators are developed. These libraries
are utilized in complex VLSI design. The generators included, can automatically
produce basic circuits that are frequently used in electronic design. These
circuits include adders, random-access memories, and various encoders/decoders.
Architectures and Hardware
Structures
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Array Processors Optimal mapping of algorithms onto various architectures
is studied. Techniques that have been developed in the Laboratory, allow
the automatic composition of a finite number of application-specific processors
onto arrays that optimally implement the parallel execution of algorithm
fragments.
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Computer Arithmetic Research focuses on the properties of number
systems and their potential use in designing high-performance processors
for computationally intensive tasks. Techniques for performance improvement
in speed, hardware complexity, and power dissipation through the exploitation
of number system properties are developed.
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VLSI Neural Networks Study of computational structures that mimic
neural networks with application in pattern recognition. Various topologies
are studied and both digital and analog implementations are considered.
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VLSI Architectures for control applications Research on parallelizing
control algorithms is carried out. VLSI architectures and processors for
the implementation of control algorithms are also investigated.
Communication
Systems (algorithms and hardware design)
The objective of the research in this domain is the development of real-time
compression integrated circuits that comply to international standards.
New architectures and developed and implemented.
Design of CAD tools
The development of design automation software that utilizes the experience
of a specialized integrated circuit designer is the objective of this research
domain.
VLSI Digital Signal Processing
Research in this domain focuses on the development of processors for applications
that require very high processing speed as well as their implementation
onto VLSI. Design methodologies are developed that include novel number
systems, and allow the parallel processing of signals at the word level
and the digit level.
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