摘要
在保密通信系统中,随着高维混沌系统的应用及复杂的混沌调制和解调方法的提出,提高了通信系统的保密性能,但大大增加了传输的信息量,使保密通信成本急剧上升。以四维超混沌系统模型为研究对象,从Lyapunov指数角度给出了系统的脉冲同步判据,实现了超混沌驱动-响应系统的脉冲同步;将脉冲同步与压缩感知技术相结合,设计了一种基于压缩感知的脉冲混沌同步新保密通信系统。通过仿真实验,说明了新保密通信系统能够解决信息冗余带来的发送信息较大、信道利用率低等问题,改善了传输速率及信道拥堵现象。经过压缩感知后的加密信息"支离破碎",增强了通信系统的保密性。
In secure communication system, with the application of high dimensional chaotic systems, and the introducing of complex chaotic modulation and demodulation method, the security of the communication system is improved, however the amount of the transmitted information is greatly increased and the cost of the secure communication rises sharply. In this paper, taking the four-dimensional hyperchaotic system model as the study object, from the perspective of Lyapunov index, the pulse synchronization criterion of the system is given, and the impulsive synchronization of hyperchaotic drive-response system is achieved. Combining pulse synchronous technique with compressed sensing technology, a new chaotic impulsive synchronization secure communication system based on compressed sensing was designed. The simulation experiments prove that the proposed secure communication system can solve the problems of low channel utilization rate and the large information transmission brought by the information redundancy, and also improve the transmission rate and channel congestion phenomenon. With compressed sensing technique, the encrypted information becomes fragmented, and the confidentiality of the communication system is enhanced .
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2014年第7期1510-1517,共8页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(61072133)
江苏省产学联创新计划(BY2013007-02
BY2011112)
江苏省高校科研成果产业化推进项目(JHB2011-15)
江苏省"六大人才高峰"项目
江苏省"信息与通信工程"优势学科资助项目
关键词
超混沌系统
脉冲同步
压缩感知
保密通信
super chaotic system
impulsive synchronization
compressed sensing
secure communication
