摘要
混沌信号是确定性非线性系统产生的极其复杂的不确定的信号,具有对初始条件的极端敏感性。将混沌信号引入保密通信系统的设计,具有保密能力强,系统简单等优点。而混沌同步是实现混沌保密通信的重要条件。研究多涡卷混沌系统的同步技术,设计多涡卷混沌保密通信系统,能进一步提高混沌系统的保密性能,增加破译难度。通过采用相互耦合法、自适应同步法对多涡卷混沌系统进行同步的仿真研究,设计正确的同步驱动函数和选择恰当的参数,两个混沌系统能达到同步。对其同步性能进行比较,可以发现自适应同步法的同步建立的时间较短,而耦合同步法的误差较小,两者各有优缺点。在混沌保密通信系统的设计中应按具体要求适当地选择混沌系统的同步方法。
Chaos is a kind of complicated and random phenomenon that is determined wholly by deterministic nonlinear systems and have high sensitivity to original conditions.Chaotic secure communication have the advantages of high security and easiness of realization,etc.Chaos synchronization is the basic condition to realize the Chaotic secure communication system.Studying the synchronizations of chaotic system with n-scolls can highly improve the system's sensitivity and more difficult to decrypt.Applying coupling synchronization and adaptive synchronization to chua's chaotic circuits with 5-scolls,designing the right synchronized functions and choosing the correct parameters,both chaotic systems can reach the synchronization.Comparing with the synchronized performance,some conclusions can be draw:adaptive synchronization have less time to reach synchronization,but couple synchronization have less bias error.To design the chaotic secure communication,the right synchronization should be chosen according to the specific conditions.
出处
《桂林电子工业学院学报》
2004年第1期17-20,共4页
Journal of Guilin Institute of Electronic Technology
