一种新的混沌调制和线性解调方法

A New Approach to Chaotic Modulation and Linear Demodulation

提出一种新的用于保密通信的混沌调制和线性解调方法 .发送端和接收端各有一个相同的混沌电路 ,将有用信号接入发送端混沌电路的线性子电路 ,使其对该混沌电路进行调制 .调制后的混沌信号传送到接收端的混沌电路 ,检测该电路中某一电流或电压变量 ,经线性滤波器解调可恢复原始有用信号 .基于这一调制、解调方法的混沌通信系统保密性强且电路简单 .对两个混沌保密通信系统的仿真实验取得了满意的结果 .

A new approach of chaotic modulation and linear demodulation for secure communication is proposed.The transmitter and the receiver have the same chaotic circuit respectively.An information signal is introduced into the linear subcircuit of the chaotic circuit in the transmitter to modulate the chaotic circuit.One of the chaotic signals modulated is transmitted to the chaotic circuit of the receiver.A certain current or voltage variable in the chaotic circuit of the receiver is detected and demodulated by a linear filter and the information signal can be recovered.The chaotic communication system based on the new modulating and demodulating approach is highly secure and simple in circuit.The simulation results of two secure communication systems designed by this approach are quite satisfactory.