基于实际信道的超混沌保密通信方案

摘要

Since the chaotic signal is distorted as transmitted over the real communication channels, a new secure communication with hyper-chaos over real channel is proposed in this paper. In this scheme, the chaotic signal at the encoder is divided into a filtered part and a complimentary part. The filtered part is used to mask the information signal. The complimentary part is added to the modulated signal and the sum is injected into the chaotic transformer, so the filter does not affect the structure of chaotic attractors. At the decoder, the same structure is used as the encoder to guarantee the symmetry between the encoder and the decoder, and the cutoff frequency of the filter could be adjusted for different real channels.Computer simulation is performed to verify the results.%针对宽频混沌调制信号在实际信道中传输时易失真的问题,提出一种基于实际信道的超混沌保密通信方案.该方案在接收端对混沌信号进行滤波并分解为两种信号:滤波信号和滤波后的补信号,滤波信号用来遮掩信息信号,滤波后的互补信号和调制信号求和后送入混沌发生器,保证混沌发生器不受滤波器的影响;接收端和发送端采用同样的结构,保证两个混沌发生器对称;而且滤波器的截止频率可以根据需要调节,以适应不同信道的需要.对该方案进行模拟仿真,并对仿真结果进行分析.