The Chaos Circuit Analyzing And Its Application Research In Secure Communication

Chaos is a kind of seeming random, chance or irregular movement, which appears in a definiteness system. Chaos has been paid wide attention because of its some good intrinsic properties, such as wide-band frequency, similarity to noise and extremely sensitivity to initial condition, and it has been widely and successfully applied to many areas. Analysing chaotic system and researching chaos control, which is the premise for the application of the chaos, it can make us know more special properties of the chaos. With the further research of chaos, the problem of the chaos circuit and its application to secure communication is studied deeply and widely. The detail is clarified as follows:1. First of all,the article introduce the produce and development of the chaotic theory, then meaning and the development foregrounds of study. The dissertation discusses basic concepts of chaos, definition, main feature and the relation of the chaos circuit.2.Introducing a kind typically analysing method of Chua's circuit, including Chua's circuit structure, state equation and the designing method of the cell Chua's circuit, then carrying on the simulation study of dymamic behavior in the Chua's circuit.3.Stressed putting forward the smallest transistor-based nonautonomous chaotic circuit, and analyzing and simulating its chaotic characteristics. As a result, proving this simple circuit can research complex chaotic phenomena.4.Analysing synchronization theory of Chua's chaotic circuit, and researching a full secure communication system of Chua's circuit. The simulation result hasn't almost distortion, and realizing first chaotic-masking secure communication method. Lastly, proposing a chaotic frequency modulation technique for spread spectrum communications, analytically and numerically demonstrating the existence and stability of the synchronous mode, having fine practicality value.