In this paper, an approach to generate multi-wing attractors in coupled chaotic systems is investigated. By coupling two identical Lü systems, novel four-wing hyperchaotic attractors are generated. In particular, novel four-wing hyperchaotic attractors are also generated by coupling a lorenz system and a Lü system. The paper shows that the equilibria of the proposed systems have certain symmetr...

Chaos synchronization, in particular isochronal synchronization of two chaotic trajectories to each other, may be used to build a means of secure communication over a public channel. In this paper, we give an overview of coupling schemes of Bernoulli units deduced from chaotic laser systems, different ways to transmit information by chaos synchronization and the advantage of bidirectional over ...

Title of Dissertation: Application of Chaotic Synchronization and Controlling Chaos to Communications Vasily Dronov, Doctor of Philosophy, 2005 Dissertation directed by: Professor Edward Ott Department of Electrical and Computer Engineering This thesis addresses two important issues that are applicable to chaotic communication systems: synchronization of chaos and controlling chaos. Synchroniza...

This paper focuses on the synchronization of two chaotic systems, when they are connected, using a multipath fading channel. The proposed algorithm is then applied to secure communication and realizing it using VHDL. The results reveal that signals to chaos ratio of -248 dB and synchronization are achieved. Performance analysis have been conducted to investigate the robustness of the encryption...

Since most of private communication schemes based on chaotic synchronization are not robust again plain-texts attacks, the introduction of delays in the schemes can be regarded as an efficient method to improve the security degree with respect to such attack. As an extension of our recent work, this paper proposes a new analogue private communication scheme based on hybrid chaotic systems with ...

We discuss experimental demonstrations of chaotic communication in several optical systems. In each, an erbium-doped fiber ring laser (EDFRL) produces chaotic fluctuations of light intensity onto which is modulated a message consisting of a sequence of pseudorandom digital bits. This combination of chaos and message propagates at a wavelength of ∼ 1.5 microns through standard single-mode optica...

In this Letter, a strategy for more secure communication using chaotic signals is presented. In this approach, the transmitter is composed by a chain of chaotic oscillator where the input to the first oscillator is modulated by the information signal and the transmitted signal is the output of the last oscillator. The receiver is a linear asymptotic approximation to the inverse of the transmitt...

In this paper we consider the use of the chaotic frequency modulation (CFM) in multi-user communications. In this scheme the base station transmits the reference signal with chaotically varying frequency. All users synchronize their chaotic oscillators to this signal and use it to generate their own information-carrying CFM signal. Using numerical simulations and experiments with electronic cir...

Secure communication systems employing chaos have recently attracted significant interest. This is partly due to their high unpredictability and simplicity of implementation over conventional secure communications systems. This study presents the implementation of four chaotic modulation techniques employing Lorenz system as chaos generator. The techniques are Chaotic Masking (CM), Chaos Shift ...

ABSTRACT On the base of the estimator variance analysis we present a classification for a number digital chaos communication schemes and conventional spread spectrum techniques, which allows the qualitative comparison of the behaviour of the systems under the presence of additive white Gaussian noise on the channel. The classification results in a ranking and shows that the conventional stored-...