摘要
提出了一种基于广义混沌映射切换的混沌同步保密通信方式 .这种通信方式首先构建产生多种混沌序列的广义混沌映射模型 ,然后在不同时段根据切换策略产生不同混沌序列 ,在发送端 ,将信号与混沌载波之和取模运算后再嵌入混沌映射的输入端进行迭代运算以实现调制 ;在接收端 ,根据切换协议 ,用同一个相应的广义混沌映射模型从接收信号中提取混沌载波并进而恢复信息信号 .研究结果表明 :这种基于广义混沌映射切换的混沌同步通信方式比基于单一混沌系统的保密通信方式具有更强的抗干扰能力 ,保密性能更好 ,且实现简单 .
A chaotic synchronization secure communication method based on chaotic maps switch is proposed. The extended chaotic model is first built to generate many kinds of chaotic signals based on changing parameters during different time durations. In the transmitter, the modulation is implemented by adding the information signal to chaotic carriers, taking a modular operation on the sum, and embedding the result of the modular operation in the iteration of the extended chaotic generating systems. In the receiver, the chaotic carriers are retrieved from the received signals by using the corresponding nonlinear dynamical system, and then the information signals are recovered. The simulation results show that this chaotic synchronization secure communication method based on chaotic maps switch has the good immunity to interference and can be realized easily. It is also shown that this chaotic secure communication system is better in security than that based on single chaotic map.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第11期2121-2125,共5页
Acta Physica Sinica
基金
国防预研基金 (批准号 :98JS0 5 4 1 DZ0 2 0 5 )资助的课题~~
