Control And Synchronization And Application Of Hyperchaotic System Combined Electronics With Optics

The generation, control, and synchronization of hyperchaos are one of the most important problems in the field of nonlinear dynamics. It has great applying potentialities which relate to broadly unknown subjects.In this dissertation we make used some methods of modulation with electronics parameter and modularization ideas of unit of function circuit, to study the control and synchronization of hyperchaos in System Combined Electronics with Optics(for short SCEO), and research its applications of secure communications experiment. There are mainly four parts about control synchronization of hyperchaos and their application in this paper: Optic systems is modulated with electronic parameters, the unit of function circuit is applied to construct circuit system, educed a equation of the nonlinear dynamics of complex map and designed a kind of digital circuit used to spread spectrum sequence and application experiment of secure communication system.In part one, optical system is modulated with electronic parameters; realize control and synchronization in hyperchaotic system combined electronics with optics. First we introduce the development of the SCEO about chaos and hyperchaos. summarize the research results in the field of electronics and optics up to date, make used of electronics modulation put on to optical system to make it generate hyperchaos, and then we set up two devices, to study dynamic model these SCEO, it based on semiconductor laser and Erbium-doped fiber laser, more study make used of electronics modulation put on to optical system realize control and synchronization hyperchaos, that is, It use electric signal to control the dynamic behavior of the optical system.In part two, we use a method of the unit of function circuit to structure some hyperchaotic circuits realize the control and synchronization of hyperchaos. First we adopt modularization design ideas of unit of function circuit, construct the system of nonlinear circuit, and make it generates. One side, it can take control and synchronization himself. And on the other side, it alsocan take more advanced control and synchronization for optics system. Adopt a classical CLHS hyperchaotic dynamics system as research problem object. Use the unit of function circuit to construct one 4D and two 5D hyperchaotic circuit systems, and make it to be controlled and synchronized. The reliabilities of these system are validated through be observed oscillograph, numerical simulations and numerical analysis.In part three, educed an equation of the nonlinear dynamic equation of complex map and designed a kind of digital circuit used to spread spectrum sequence. Make used of nonlinear dynamic equation and hyperchaotic circuit and through spread spectrum sequence or hyper chaos design the secure secrecy unit of hyperchaotic device. Other the hyperchaos application software is designed which can be used to operate on computer and realize multimedia secrecy function such as text files, picture files, speech language and so on.In part four, research and discuss application experiment of secure communication system. To utilize hyperchaos research results, we begin some application study such as digital circuit of the spread spectrum sequence of hyperchaos, the hyperchaos application software used for multimedia files of secrecy with computer, unit of secrecy based on the software radio communication. Through secrecy communication contrast the time series with disperse in the hyperchaotic system; more discuss its some problem such as modulation and demodulation, anti-jamming and bit error rate. Another, more analyzed its influencing orderliness in codes transmits.