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高频混沌信号源的实现对混沌通信、现代电子对抗、非线性信号处理等领域有着极其重要的意义。提出了一种基于数字信号处理(DSP)与直接数字频率合成(DDS)技术的新的高频混沌信号源的解决方案,具有数字化、结构简单、频率分辨率高和频率转换速度快等优点。具体阐述了基于该方案的混沌信号源的硬件和软件的设计和实现过程。以Lorenz混沌方程为例,使用矢量信号分析仪对混沌信号源的输出信号进行了解调,验证了其正确性。实验结论表明该设计方案是行之有效的。
The realization of high-frequency chaotic signal source is extremely important to chaotic communications, modern electronic warfare and nonlinear signal processing. A new solution of high frequency chaotic signal source based on digital signal processing (DSP) and direct digital frequency synthesis (DDS) is proposed. It has the advantages of digitalization, simple structure, high frequency resolution and fast frequency conversion. The design and implementation process of the hardware and software of chaotic signal source based on the scheme are described in detail. Taking the Lorenz chaotic equation as an example, the output signal of chaotic signal source is demodulated using a vector signal analyzer, which verifies its correctness. The experimental results show that the design is effective.