【作者】 盛苏英；

【导师】 朱灿焰；

【作者基本信息】 苏州大学 ， 通信与信息系统， 2006， 硕士

【摘要】 本文围绕混沌同步技术及其在数字保密通信中的应用这一课题,进行了较为广泛深入的研究,旨在实现混沌同步在实际数字保密通信中的应用。首先,从数字通信技术角度提出了自己的混沌同步定义,并分析了现有的混沌渐近同步方法在数字保密通信中应用的局限性,从而指出混沌数字保密通信的应用研究重点是混沌严格同步技术;然后,重点研究了混沌脉冲同步方法,并利用“时间帧”格式成功构造了一个基于脉冲同步的混沌保密通信系统;再在脉冲同步方法及其应用的启发下,从通信协议的思路出发,提出了一种新型的混沌协议同步技术并进行改进;最后,对选用的UDP通信协议进行适当改造,以计算机网络为平台,构建了一个基于协议同步的混沌语音保密通信系统,研究了系统实现协议同步的相关技术,并初步建立了混沌协议同步机制。本论文所取得的一些初步成果,在一定程度上解决了混沌数字保密通信实用化的关键技术难题,实现了在实际网络环境中混沌同步在数字保密通信中的应用。更多还原

【Abstract】 The topics about chaotic synchronization technology and its application to digital secure communication are deeply and detailedly revolved in this article. The aim is to achieve the application of chaotic synchronization in actual digital secure communication. Firstly, the chaotic synchronous theory is researched, and our own definition of chaotic synchronization is proposed based on the digital communication technology. The application limitation of existing chaotic asymptotic synchronization in digital secure communication system is also analyzed, thus it is pointed out that the researching key to application for digital chaotic secure communication is the strict chaotic synchronization method. Secondly, chaotic impulsive synchronization is emphatically studied. And it is successful to construct a chaotic secure communication system based on impulsive synchronization using“time frame”format. Thirdly, it is enlightened by impulsive synchronization and its application that we can consider protocol for chaotic synchronization. Thus a kind of new protocol synchronization technology for chaotic communication is proposed and improved. At last, the UDP protocol is selected to be made appropriately reformed. And based on an actual communication platform, a chaotic speech secure communication system is constructed using protocol synchronization. The establishment of synchronous mechanism for the system is simply described, and the realization techniques for the system are studied. Some results in this article will be a good choice in some extends for the way to solve the vital technical difficulties of practical chaotic digital communication. And an actual network digital secure communication based on chaotic synchronization is taken into implimentation.更多还原