四维超混沌射频隐身跳频通信设计方法

为提高飞行器通信系统的抗截获性能，提出了一种基于四维超混沌系统的射频隐身跳频通信设计方法。该方法构建了四维超混沌系统，扩展了系统解空间，有效增加了系统复杂度，并通过引入周期性扰动措施，解决了有限精度带来的短周期现象。在四维超混沌系统的基础上，利用超混沌系统生成的双通道超混沌序列，实现了跳频通信系统的频率序列和周期序列联合不确定设计方法。仿真结果表明：四维超混沌系统与传统混沌系统相比，其复杂度最优，在相同有限精度条件下，超混沌系统的周期性明显减弱。另外，基于四维超混沌设计的跳频系统，其截获概率优于常规跳频系统，具有较好的射频隐身性能。

Design Method of Radio Frequency Stealth FrequencyHoppingCommunications Based on FourDimensionalHyperchaotic System

In order to improve the anti interceptionperformance of a vehicle communications system, a radio frequency stealthfrequency hopping communications design method based on a four dimensional hyperchaotic system is proposed. This method constructsa four dimensional hyperchaotic system, expands thesystem solution space, effectively increases the system complexity, and solvesthe short period phenomenon caused by limited accuracyby introducing the periodic disturbance measures. Based on the four dimensional hyperchaotic system, the dual channelhyperchaotic sequence generated by the hyperchaotic system is used to realizethe joint uncertain design method of the frequency sequence and periodicsequence of the frequency hopping communication systems. The simulation resultsshow that compared with the traditional chaotic system, the four dimensional hyperchaotic system has the best complexity. Under thesame limited precision, the periodicity of the hyperchaotic system issignificantly weakened. In addition, the frequency hopping system based on thefour dimensional hyperchaotic design has betterinterception probability than the conventional frequency hopping system, andhas better radio frequency stealth performance.