中文摘要：

混沌系统被广泛应用于军事保密通信和信息安全领域,该文在Liu混沌系统基础上设计了一个新型混沌系统,并重点对新型混沌系统的基本动力学特性进行了分析,包括系统的分岔图、相图、Lyapunov指数图分析。在保留了Liu混沌系统的优点基础上,增加了参数个数,扩大了参数范围,最后利用DSP实现了该新型混沌系统,并对Liu混沌系统生成的数字序列和改进后的序列进行NIST测试,对比测试结果表明改进后的数字序列性能更优。

英文摘要：

Chaotic system is widely used in fields of military secure communication and information security. A new chaotic system based on Liu chaotic system is designed and the basic dynamics characteristics of this system are analyzed, including bifurcation diagram, phase diagram and Lyapunov exponents diagram. On the basis of retaining the advantages of Liu chaotic system, the new system increases the number of parameters and extends the range of parameters. Finally the system was realized by using DSP. The sequences generated by the new system and Liu chaotic system were tested by NIST. The result shows that the performances of the improved digital sequence are better.