EPFLISCLANOS Research Theme Engineering Applications of Chaos Communications and Chaos

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EPFL-ISC-LANOSResearch Theme Engineering
Applications of Chaos- Communications and
Chaos -
Thomas Schimming, Martin Hasler,Slobodan Kozic,
Kumiko Oshima EPFL-LANOS
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Motivation

• Chaos based broadband communications

• Easily obtained spread spectrum properties
• Straightforward hi-power implementations

• Optimization of chaos based communications

• Performance problems of available
  (synchronization based) receivers
• Need for understanding of performance limits
• Study on system level before implementing

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Framework

• Block scheme

• Digital chaos based communications

• No source or channel coding
• Communication channel is imperfect (noisy!!!)

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Approach

• Analysis ? Optimized design

Optimal Receiver

• Statistical model

Sub-optimal Receiver

• Structural simplification
• Correlation paradigm

Optimized Transmitter
Chaos based communicationsat the performance
limit

• Quantified performance
• Overall optimized design

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Example CSK

• Modulation - Chaos Shift Keying

• Switching of chaos generators (completely known)
• Analogy FSK

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Research results

• Statistical framework for any piecewiselinear
  map
• Optimal receiver for chaos based schemes works
  best, but with too high complexity
• Performance potential throughinformation theory

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Current and future work

• Optimal design of other chaos based communication
  systems(beyond the piecewise linear map)
• Capacity achieving systems based onchaotic
  systems
• Identification of channels which favorchaos
  based designs