摘要
针对混沌保密通信中传统振荡器因其混沌映射容易被预测从而导致通信安全性降低的问题,提出了一种由单一电压输入控制的四维混沌振荡器。该混沌振荡器由一个直流电压进行控制,通过调节该控制电压,可使振荡器处于周期、倍周期、混沌甚至是超混沌运动状态。由于该振荡器混沌状态下的吸引子是隐藏吸引子,其位置不能通过在线平衡点邻域内选任意初值的方法来确定,从而加强了该混沌振荡器动力学行为的不可预测性,提高了保密通信的安全性。硬件实验结果表明,当控制电压在区间[2.80,3.40]V上取值时,该振荡器对外界干扰最为敏感,其混沌运动的不可测性最高,从而使混沌保密通信的安全性达到最佳。
A 4Dchaotic oscillator controlled by a single voltage input is proposed to solve the problem that the security in chaotic secret communication is reduced because the chaotic mappings of traditional chaotic oscillators are easy to predict.The chaotic oscillator is controlled by a DC voltage and it can be kept in motion state of period,period-doubling,chaos or even hyper-chaos through regulating the control voltage.Because the oscillator＇s attractors are hidden attractors in chaotic state and the locations of these attractors cannot be calculated through choosing points in the neighborhood of line equilibrium,the unpredictability of these chaotic oscillator＇s dynamic behaviors and the security of secret communication are improved.Hardware experiment shows that when the voltage is controlled within the interval of[2.80,3.40]V,the chaotic oscillator is the most sensitive to external disturbance,the unpredictability of its chaotic motion is the highest,and the security of chaotic secret communication achieves the best.
作者
李石磊
刘崇新
胡晓宇
倪骏康
LI Shilei;LIU Chongxin;HU Xiaoyu;NI Junkang(School of Eleetrieal Engineering, Xi＇an Jiaotong University, Xi＇an 710049, China)
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2017年第6期35-40,共6页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金资助项目(51177117)
关键词
保密通信
混沌振荡器
线平衡点
secret communication
chaotic oscillator
line equilibrium
