共查询到17条相似文献,搜索用时 156 毫秒
1.
细胞神经网络超混沌系统同步及其在保密通信中的应用 总被引:22,自引:2,他引:20
本文研究四阶细胞神经网络超混沌系统同步方法,提出了一种基于细胞神经网络超混沌同步系统的扩展谱保密通信系统;这个保密通信系统不仅只需传递一个标量信号,而且由于采用了超混沌系统,所设计的保密通信系统具有更高的保密性。 相似文献
2.
蒋国平 《南京邮电学院学报(自然科学版)》2000,20(3):5-10
研究了四阶细胞神经网络超混沌系统同步方法,分析了系统存在参数失配和信道噪声时的同步性能,提出了一种基于细胞神经网络超混沌同步系统的扩展频谱保密通信设计方法。提出的扩频保密通信方法不仅只需传递一个标量信号,而且由于采用了超混沌系统,所设计的扩频通信系统具有更高的保密性。 相似文献
3.
4.
5.
6.
7.
一种超混沌混合保密通信方案 总被引:2,自引:1,他引:1
本文将超混沌系统单变量单向耦合同步方法与两信道保密通信方案相结合,给出了一种双信道超混沌混合保密通信方案。发送端利用超混沌振荡器的一个或多个状态产生混沌密钥和遮掩信号,对信息信号先加密再遮掩,获得加密信号后使用一个信道传输;利用另一信道传输实现超混沌系统同步的单变量同步信号。接收端基于单变量单向耦合同步方法获得解密同步信号,实现信息信号高信噪比恢复。仿真结果表明了方案的有效性。 相似文献
8.
9.
10.
11.
12.
以超混沌电感电容(LC)振荡电路模型为对象,提出了一种线性和非线性混合反馈同步通信方案。通过设计李雅普诺夫函数对系统同步的稳定性进行了理论分析,得出了稳定状态下系统反馈强度的临界值。同时,基于线性和非线性混合反馈同步方式,研究了信号的注入式混沌保密通信方法。该方法不仅增强了通讯的保密性,而且对噪声有较强的鲁棒性,因而具有较好的工程应用价值。 相似文献
13.
Jen-Fuh Chang Teh-Lu Liao Jun-Juh Yan Hsin-Chieh Chen 《Circuits, Systems, and Signal Processing》2010,29(3):527-538
This paper investigates the synchronization of chaotic systems and its application in secure communication. First, a particle
swarm optimization (PSO)-based proportional -integral (PI) controller is proposed for synchronization of general chaotic systems.
By using the PSO algorithm, optimal control gains in PI controller are derived such that a performance index of integrated
squared error (ISE) is as minimal as possible and synchronization can be achieved. Then a chaotic secure communication system
based on synchronized coupled Lü systems is implemented using basic electronic components. Finally, both simulation results
and the experimental results demonstrate the proposed PSO-based PI scheme’s success in the secure communication application. 相似文献
14.
15.
16.
Pizolato J.C. Romero M.A. Goncalves Neto L. 《IEEE transactions on circuits and systems. I, Regular papers》2008,55(4):1108-1115
A secure communication system based on the error-feedback synchronization of the electronic model of the particle-in-a-box system is proposed. This circuit allows a robust and simple electronic emulation of the mechanical behavior of the collisions of a particle inside a box, exhibiting rich chaotic behavior. The required nonlinearity to emulate the box walls is implemented in a simple way when compared with other analog electronic chaotic circuits. A master/slave synchronization of two circuits exhibiting a rich chaotic behavior demonstrates the potentiality of this system to secure communication. In this system, binary data stream information modulates the bifurcation parameter of the particle-in-a-box electronic circuit in the transmitter. In the receiver circuit, this parameter is estimated using Pecora-Carroll synchronization and error-feedback synchronization. The performance of the demodulation process is verified through the eye pattern technique applied on the recovered bit stream. During the demodulation process, the error-feedback synchronization presented better performance compared with the Pecora-Carroll synchronization. The application of the particle-in-a-box electronic circuit in a secure communication system is demonstrated. 相似文献
17.
超混沌M-G系统参数辨识及其在通讯中的应用 总被引:6,自引:0,他引:6
连续时滞混沌系统是无穷维系统,这样的系统可产生具有多个正的Lyapunov指数的超混沌现象,因此系统可产生复杂的时间序列.这个特征使它特别适用于保密通讯.基于此分析,首先本文对M-G超混沌系统的c参数进行辨识研究,给出一种辨识M-G系统c参数的新方法.然后,尝试用欲传输的信号对系统的c参数进行调制,在接收端利用本文提出的参数辨识方法来解调,从而实现数字信号的保密通信.最后大量仿真发现,当辩识的收敛时间小于数字脉冲的持续时间时,本文的方法可以很好的进行解调. 相似文献