This paper reports on the use of a twisted map digital chaotic sequence as a carrier signal in a COOK system. The sequence generated shows low cross-correlation properties with very large signal space which is desirable for spread spectrum communication. A potentially cost-effective solution for wideband communications is to use a wideband chaotic carrier. COOK offers the simplest solution to c...

We present the characteristics and an analysis of a proposed communication scheme fully based on chaos theory. The key point is that the proposed scheme introduces the dynamical system as a way to encode and decode information and as a signal wave generator. In this scheme, all the protocols used to communicate digitally are fully integrated into one single design based on a chaotic modulation ...

This chapter provides an overview of the state of the art of current chaos communication schemes and introduces the use of signal processing to improve the communication performances. Popular communication schemes in the literature, including chaotic spreading sequence (CSS), chaotic carrier (CC), chaos masking (CM), chaos shift keying (CSK), differential chaos shift keying (DCSK) and chaotic p...

Spread spectrum (SS) technology is a data transfer technique designed to overcome the interference problems associated with narrow-band very high frequency and ultra high frequency Data transfer systems. Spread spectrum communication is used to reduce jamming of communication signal and provides a highly secure communication. In this paper we specifies the Field Programmable Gate Array (FPGA) i...

Based on stochastic calculus, we provide a rigorous formulation for the numerical evaluation of the error probabilities of two modulation techniques for the chaotic Lorenz communication system with AWGN disturbance. These results provide further understanding on the robust synchronization ability of the Lorenz system to noise. The synchronization robustness of Lorenz systems for various time sc...

In communication networks, the most significant impediment to reliable communication between end users is the congestion of packets. Many approaches have been tried to resolve the congestion problem. In this regard, we have proposed a routing algorithm with chaotic neurodynamics. By using a refractory effect, which is the most important effect of chaotic neurons, the routing algorithm shows bet...

In this paper, adaptive synchronization with unknown parameters is discussed for a unified chaotic system by using the Lyapunov method and the adaptive control approach. Some communication schemes, including chaotic masking, chaotic modulation, and chaotic shift key strategies, are then proposed based on the modified adaptive method. The transmitted signal is masked by chaotic signal or modulat...

The properties of nonlinear dynamics and chaos are shown to be fundamental to optimal communication signals subject to two practical and realistic design requirements: (i) operation in a noisy environment and (ii) simple hardware implementation. Starting with a simple electronic circuit, a linear filter receiver is presumed, and the matched optimal communication waveform that maximizes the rece...

This paper presents a novel chaotic communication method using an Unscented Kalman Filter (UKF). Applying UKF, the method proposes the estimation of the state variables of the chaotic dynamical system and synchronization. The proposed method is then applied to new private secure communication. The chaotic synchronization is implemented by the UKF in the presence of processing noise and measurem...

The necessity of simultaneous access to one communication channel by many users, e.g., in satellite communication systems or cellular telephony, has led to the development of the corresponding standards: FDMA (Frequency Division Multiple Access) and TDMA (Frequency Division Multiple Access). Increasing requirements to the communication channel transmission rates gave rise to the appearance of C...