基于参数调制原理,针对一阶时滞Logistic混沌系统设计了相应的参数观测器,仅传递单路信号就可以成功辨识出系统中的未知参数,从而恢复出调制在参数中的模拟信号,并在此基础上采用不同频率信号代替“0”或“1”,设计出具体的数字保密通信方案.数值仿真验证了本方法的有效性.
Based on parameter modulation theory,a parameter observer is designed for the first order time-delay Logistic chaotic system. The unknown parameter of this system can be identified by transmitting a single signal,then the useful signal modulated in the parameter will be recovered successfully. By choosing different frequency signals as "0" and "1",a practical digital secure communications scheme is designed. Numerical simulation shows the effectiveness of the method.