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Start Over Author "Schwarz, Wolfgang" Topic chaos theory
14 results on '"Schwarz, Wolfgang"'

1. Probability Distributions of the Level Crossing Intervals of the Chaotic Process Generated by the Logistic Map.

Author

Munakata, Tsutomu and Schwarz, Wolfgang

Subjects
*DISTRIBUTION (Probability theory), *STOCHASTIC processes, *CHAOS theory, *MATHEMATICAL mappings, *NUMERICAL analysis
Abstract

The statistical characteristics of the level crossing intervals of the chaotic process generated by the logistic map have been studied. In the previous works, the probability distributions Pn of the crossing intervals for this type of chaotic process have been derived only in the form of recursive expressions. In this paper the probability distributions p0 and p1 are studied by the help of Tent-map, and they are obtained in the form of explicit expressions, instead of recursive expressions. The numerical calculations for these quantities become simple and accurate. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2007
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2. Design and Realisation of Chaotic Encryption Systems.

Author

Schwarz, Wolfgang and Falk, Thomas

Subjects
*DATA encryption, *CHAOS theory, *DATA transmission systems
Abstract

Chaotic signal transmission systems are often claimed to be secure by itself. Using a simple example it is shown, that this is not true and that exact design criteria have to be set up before starting the design of a chaotic encryption system. Then, beginning with statistical design objectives an information encryption system is systematically designed. The structure design leads to a controlled filter structure with overflow nonlinearity, the parameter design has to assure chaotic behaviour and mixing properties of the encoded signal. This defines the limits for the choice of the parameter set representing the key for the encryption. After developing the system structure the system is realized by electronic circuitry. Discrete and IC versions of the solution are presented. In order to prove that the system meets the design requirements experimental results are provided. It can be shown that in a n-th order system the statistical characteristics up to the n-th order of the output signal will not be affected by the input signal. The paper closes with some security estimates for the designed system. [ABSTRACT FROM AUTHOR]

Published
2002

5. CHAOS AND PSEUDORANDOMNESS.

Author

Kilias, Torsten, Leimer, Frank, and Schwarz, Wolfgang

Subjects
CHAOS theory, MATHEMATICAL sequences, ELECTRONIC equipment, RANDOM number generators, COMPUTER simulation
Published
1994

8. EDITORS' PREFACE.

Author

Schwarz, Wolfgang and Davies, Anthony C.

Subjects
ELECTRONIC systems, NONLINEAR dynamical systems, CHAOS theory
Published
1994

9. Chaotic and Random Point Processes: Analysis, Design, and Applications to Switching Systems.

Author

Baranovski, Alexander L. and Schwarz, Wolfgang

Subjects
*SWITCHING circuits, *CHAOS theory, *SIGNAL generators, *POWER electronics
Abstract

This paper treats the theory of chaotic point processes (chaotic event streams). Processes of this type appear in continuous-discrete or switching systems, which have become a topic of research in the last few years. The statistical analysis of chaotic point processes is interesting both from theoretical and practical points of view and important for practical applications in signal generation and power electronics. In this paper, the basic model and the characteristics of point processes are provided. A basic statistical analysis is carried out and demonstrated with some applications. [ABSTRACT FROM AUTHOR]

Published
2003
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10. Chaos and Cryptography.

Author

Dachselt, Frank and Schwarz, Wolfgang

Subjects
*CRYPTOGRAPHY, *CHAOS theory, *DATA encryption
Abstract

Shares opinions and research results on the conjunction of chaos and cryptography. Benefits of adapting some of the methods for chaotic encryption systems; Discussion on cryptographical methods; Selected material for a cryptographical background which applies for conventional and continuous-value encryption systems.

Published
2001
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11. Noise Performance of Chaotic Communication Systems.

Author

Abel, Andreas and Schwarz, Wolfgang

Subjects
*CHAOS theory, *TELECOMMUNICATION systems, *STATISTICS
Abstract

Presents cumulant analysis tools suitable for the study of chaos in communication systems. Communication system model to which the analysis methods are applied; Overview of the applied statistical analysis tools; Analysis on the performance of differential chaos shift keying scheme and the transmitted reference systems.

Published
2000
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12. Electronic chaos generators--design and applications.

Author

Kilias, Torsten, Kelber, Kristina, Mögel, Andreas, and Schwarz, Wolfgang

Subjects
CHAOS theory, BROADBAND communication systems
Abstract

Describes the design of chaotic systems generating signals with prescribed probability distribution and power spectrum properties. Realization of electronic chaos generators as discrete-time, digital and analog systems; Use of very simple nonlinear dynamic systems in generating broadband signals.

Published
1995
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13. Information transmission by chaotizing.

Author

Böhme, Frank, Bauer, Andreas, Feldmann, Ute, and Schwarz, Wolfgang

Subjects
CHAOS theory, DATA transmission systems
Abstract

Describes the keying of information in spread spectrum signals by the use of chaotic systems. Description of the chaotizer-dechaotizer concept for continuous and discrete time systems; Applications of several encoder-decoder pairs.

Published
1995
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14. REALISATIONS OF CHUA'S CIRCUIT.

Author

Chua, Leon O., Dachselt, Frank, and Schwarz, Wolfgang

Subjects
CHUA'S circuit, CHAOS theory, PHOTOMICROGRAPHY, ELECTRONIC circuit design, APPROXIMATION theory
Published
1994

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