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在硬件实验研究的基础上,建立一种环形蔡氏电路,简述其工作原理及其特点。在此基础上提出用环形蔡氏电路实现混沌反馈调制的一种语音保密通信方案,分析了该方案的同步原理,讨论了发送端和接收端电路参数匹配情况下的同步收敛特性,设计了硬件实验电路,进行了语音混沌保密通信的硬件实验研究,给出了实验结果。
Based on the hardware experimental research, a ring-shaped Chua’s circuit is established, and its working principle and characteristics are briefly described. On the basis of this, a speech secure communication scheme based on chaotic feedback modulation with ring-shaped Chua’s circuit is proposed. The synchronization principle of the scheme is analyzed. The synchronization convergence under the matching of the circuit parameters of transmitter and receiver is discussed. Circuit, conducted a hardware chaotic secure communication experiment, gives the experimental results.