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基于分数阶傅里叶变换(FRFT)域的分形特征研究压制干扰的存在性检测问题。首先,分析了典型的三种压制干扰的分形特征,说明了典型压制干扰信号具有分形特性,并采用盒维数和信息维数定量描述它们的分形特征。然后,发现了压制干扰和高斯白噪声在FRFT域具有不同的分形特征,进而提出了一种检测压制干扰存在性的方法。最后,仿真验证了该方法的有效性和优越性。
Fractal Characteristics Analysis Based on Fractional Fourier Transform (FRFT) Domain. Firstly, the fractal characteristics of typical three kinds of suppression interference are analyzed, and the fractal characteristics of the typical jamming signal are illustrated. The box dimension and the information dimension are used to describe their fractal characteristics quantitatively. Then, it is found that the compressive interference and Gaussian white noise have different fractal characteristics in the FRFT domain, and then a method to detect the existence of the suppression interference is proposed. Finally, the simulation verifies the effectiveness and superiority of this method.