数模混合混沌系统的设计与电路仿真  

Design and circuits simulation of mixed digital-analog chaotic system

作　　者：胡汉平[1] 卢鹏宇[1] 王祖喜[1] 杨杰[1] 

机构地区：[1]华中科技大学图像识别与人工智能研究所,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2007年第10期8-11,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金重大研究计划资助项目(90104029);国家高技术研究发展计划资助项目(2006AA01Z426)

摘　　要：提出了数模混合混沌系统的实现方案,利用连续混沌系统和数字混沌系统的互补特性,使两种系统通过耦合模块的相互作用,既克服了连续混沌系统难以长时间稳定同步工作且需要通过信道传输同步信号的缺点,又解决了因有限字长效应导致的数字混沌系统的特性退化问题.本系统在Cadence IC50平台下用硬件描述语言Verilog-a进行电路设计及行为级仿真,仿真结果显示该设计满足功能要求.Discrete chaos system can work steadily for long time ,but the period is too short because of the finite word length in digit system;continuous chaos has fine characters of cryptography,but it can not be synchronous for long time.The design of mixed chaotic systems given in this paper utilizes the mutual complementarity between continuous chaotic systems and discrete chaotic systems to conquer the shortcoming of the each single chaotic system,using their mutual effect.It is a new chaos synchronization system which is security and can keep synchronal for long time.We designed the circuit of this system and accomplished the simulation testing,using the analog hardware language Verilog-a in Cadence IC50 platform,and the result indicates this design meets the request of function.

关 键 词：数模混合混沌系统 同步 CadenceIC50平台 VERILOG-A 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]