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中文摘要：
针对混沌调制系统中存在相图信息泄密的问题,文中提出了基于混沌参数调制模型设计混沌频率调制系统的方法。该方法利用预传信号作为调制信号,调制混沌系统中特定的参数,使加载信息的混沌信号仅产生频谱分布上的变化,而信号的吸引子位置特性不随时间发生变化,同时文中也给出了基于误差检测的信号解调方法。通过证明及实验仿真,该系统实现了对连续信号的混沌频率调制,并有效地消除了混沌信号在相图中的分叉现象,以及提高了混沌调制系统的安全性能。
英文摘要：
In order to improve the weakness of the chaotic modulation system, a new chaotic frequency modulation system based on chaotic parameter modulation model is designed. In the new system, special parameters of the chaotic system are modulated by the information signal, thus to make sure that the attractors of the chaotic frequency modulation signal remain stable when the parameters are changed. Furthermore the demodulation method based on error detection is proposed. Simulation and test indicate that the method could transfer the continuous signal and eliminate the divarications of the attractor, and thus the security of the communication system is enhanced.
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