Reseach On A Class Of Hyper-chaotic Synchronization And Its Application Of Secure Communication

Chaos is a special movement generating by a non-linear dynamic systems. It is a reciprocated, steady state and non-periodic movement that come from a determined system, and which sensitivity depends on initial condition. Similar with random vibration, chaos phenomenon long-term unpredictability, that especially fit for Secrecy Communication Field. Chaos is playing more and more important in modern science. M. Shlesinger from USA, one of the advocate of Chaos said,'The science in 20 century need to remember three matters forever: Relativism, Quantum Mechanics and Chaos.'Chaos synchronization provides theoretical foundation for Chaos Secrecy Communication, this makes chaos synchronization and its applied research become hot research in today's related subjects.In this thesis, a class of hyperchaos and its application in Secrecy Communication are research deeply. The main contents are as follows:①Based on formulation of chaos basic theory, summary of the research actuality and tendency of Chaos synchronization are made, and common methods of chaos synchronization, such as Drive-Response Synchronization, Coupling Synchronization and Continuous Variable Feedback Synchronization are analyzed.②The author of the thesis emphasizes to research the hyperchaotic synchronization of two continuous time delayed neuron systems with linearly bi-directional coupling. Based on the introduction of stability theory of Lyapunov functional method, the synchronization of bi-directional coupling hyperchaos with continuous time delay two-neuron system is research. The mode of hyperchaotic synchronization is constructed, and a sufficient condition for system synchronization is given. Within the range of given system parameter and coupling intensity, the system realizes satisfactory synchronization effect.③Based on the analysis of the general methods of chaos synchronization secrecy communication, such as chaos conceal, chaos parameter modulation and chaos keying, a two-ways real-time spread-spectrum secrecy communication method is presented by chaos masking technology. The simulation result indicates that the designed secrecy communication method can obtain a relatively ideal result.