The Logistic Chaotic Signal Generation, Processing And Application In Communication System

The application of the chaos theory, not only solved the complex behavior theory and application problem which contused us in the nonlinear system for a long time, but also revealed a substance movement world of new form and structure. It put together the simpleness and complexity,disorder and order,ascertain and random,stability and instability. The chaos phenomenon widely exists in the external world,it is one of the important achievement in nonlinear science to realise the chaos phenomenon. Chaos theory is concerned widely because of its natural characteristic,and it also has gotten wide and successful application in many area. With the further research of chaos, the problem of the chaos theory and its application to secure communication has been studied deeply and widely. This article is to deeply study the chaotic signal generation,processing and application in communication system. The detail is clarified as follows:(1)First of all, the article introduces the produce and development of the chaotic theory, the meaning and the development foregrounds of study. The dissertation discusses basic concepts of chaos, definition, main feature, the ways to chaos. Moreover, the study way and the familiar models and the power spectrum characters of chaos are investigated briefly.(2) Based on the Logistic mapping, establishing a chaos signal generator, and giving the chaos circuit of concrete carrying out method, then carrying on the simulation and hardware experiment study of dynamic behavior in the chaos circuit. The result is that this chaos signal generator has nicer trait and application foreground.(3)Designing a secure communication system project based on the established Logistic mapping chaos signal generator, analyzing this voice transmission sinal system,such as channel trait,synchronous convergence trait and security. Giving the results of simulation with MATLAB. At the same time, aiming at the limitation of the high frequency singal modulation in this system, giving a CSK chaos digital communication system project and studying it in detail.