一种基于DCSK的数字保密通信系统  

A secure communication system based on DCSK

作　　者：贺利芳[1] 张刚[1] 张天骐[1] 

机构地区：[1]重庆邮电大学 信号与信息处理重庆市重点实验室,重庆400065

出　　处：《电子技术应用》2012年第7期103-106,共4页Application of Electronic Technique

基　　金：国家自然科学基金项目(61071196;10776040);教育部新世纪优秀人才支持计划(NCET-10-0927);信号与信息处理重庆市市级重点实验室建设项目(CSTC;2009CA2003);重庆市自然科学基金项目(CSTC;2009BB2287;CSTC;2010BB2398;CSTC;2010BB2411)

摘　　要：传统的基于混沌键控(CSK)保密通信需要在收发两端建立混沌同步系统,而混沌信号由于对初值的极端敏感性而极难达到同步,所以这种方式难以用于实际。针对这个问题,提出了一个新的差分混沌键控(DCSK)系统,此系统收发端不需混沌同步。深入研究了差分混沌键控(DCSK)调制的性能,并且和二相相移动键控(BPSK)调制进行了比较。最后给出了一个DCSK调制在图像传输中的新应用。In the traditional secure communication based on Chaos Shift Keying （CSK）, synchronization needs to be established between the transmitter and receiver of the system. While due to the extreme sensitivity of initial value of chaotic signal, it is very difficult to achieve synchronization so this method is difficult to be applied practically. Therefore to solve this problem, a new Dif- ferential Chaos Shift Keying （DCSK） system was proposed in which chaos synchronization is not necessary. The new system was deeply studied and was compared with the Binary Phase Shift Keying （BPSK） modulation. Finally, a new application with DCSK in the image transmission was given.

关 键 词：保密通信 混沌同步 差分混沌键控 

分 类 号：TP918.8[自动化与计算机技术]