In recent years, the availability of wireless technologies has become prominent solution for next generation wireless networks (NGWN). Hence the demand for secure communication is an important research issue. Cryptography is recognized as the best method of data protection against active and passive attacks. Therefore a novel chaotic cryptographic scheme is proposed for real time communication....

Methods of chaos synchronization applied to communication with chaotic signals over band-limited channels are studied numerically and experimentally. The "rst group of methods employs a "lter in the receiver which is designed to compensate channel distortions of the transmitted signal. The second approach does not use the compensation but relies on the design of chaotic oscillators which shapes...

Performance of chaotic communication in radio-over-fiber (ROF) transmission based on optoelectronic feedback semiconductor lasers is studied numerically. The chaotic carrier is generated by optoelectronic feedback semiconductor lasers, where chaotic communication is realized by synchronizing a receiver laser with a transmitter laser. Transmission quality of different message encoding schemes, i...

A self-pulsating laser diode under external drive shows the nonlinear dynamical effects of two competing frequencies. One can establish a route to chaos by increasing the modulation current. However, when the modulation frequency is varied, the chaotic state is suddenly destroyed at the harmonic frequencies of the self-pulsating frequency. This approach therefore offers a simple chaotic light s...

This paper aims to present the combination of chaotic signal and evolutionary algorithm to estimate the unknown parameters in five-dimension chaos synchronization system via the Pecora-Carroll method. The self-organizing migrating algorithm was used to estimate the unknown parameters. Based on the results from evolutionary algorithm, two identical chaotic systems were synchronized. Key-Words: S...

Chaotic synchronization, as a key technique of chaotic secure communication, has received much attention in recent years. This paper proposes a nonlinear synchronization scheme for the time-delay chaotic system in the presence of noise. In this scheme, an integrator is introduced to suppress the influence of channel noise in the synchronization process. The experimental results demonstrate the ...

Prediction of the statistics of scattering in typical wave-chaotic systems requires combining system-specific information with universal aspects of chaotic scattering as described by random matrix theory. This Rapid Communication shows that the average impedance matrix, which characterizes such system-specific properties, can be semiclassically calculated in terms of ray trajectories between po...

In this paper, a new approach for communication using chaotic signals is presented. In this approach, the transmitter contains a chaotic oscillator with a parameter that is modulated by an information signal. The receiver consists of a synchronous chaotic subsystem augmented with a nonlinear filter for recovering the information signal. The general architecture is demonstrated for Lorenz and Ro...

Chaotic system based message encryption system for wired and wireless networks broadly used in computer engineering, communication and network security, such as robotic systems, encryption, synchronization and genetic network. The main motive for developing the chaos based cryptosystem is to attain encryption with several compensation over the conventional encryption algorithms such as high sec...

Detection of chaotic states in the nonlinear chaotic Chua’s oscillatory circuit has been considered. A new approach, based on the concentration measure of the time-frequency (TF) representation, is proposed for determination of the current circuit state. Parameters of the proposed algorithm are studied in details. The algorithm is applied in the case of moderate noisy signal, as well as for bre...