摘要
对一种采用Logistic逆映射的混沌数字调制通信系统输出的逆映射调制序列采用伯内廷法做了Lya punov指数谱的分析,发现其在较宽的参数范围内都是具有混沌性质的,从而解决精度有限使混沌序列呈现周期性的问题,同时还用取反变换和电平搬移的方法分别对此种通信系统的通信安全性与误码率做了改进,经过仿真验证了系统的可实现性和优越性.
The Lyapunov exponent analysis of inverse mapping modolation sequence,which is the output from the chaotic digital modulation communication system with logistic inverse mapping,reveals the chaotic properties in relatively wide parameter range,so the problem that the chaotic sequence presents periodicity is resolved.Meanwhile,communication security and BER are improved by using negative transformation and voltage movement.Simulation proves the feasibility and advantages of the system.
出处
《应用科技》
CAS
2005年第4期16-18,共3页
Applied Science and Technology
关键词
逆映射
LYAPUNOV指数
伯内廷法
电平搬移
取反变换
inverse mapping
lyapunov exponent
bonneting method
voltage movement
negative transformation
