【摘要】 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。更多还原

【Abstract】 This paper addresses the existence detection of blanket jamming based on fractal features in fractional Fourier transform(FRFT)domain.Firstly,the existences of fractal features of three typical jamming signals are analyzed,and box dimension and information dimension are employed to describe fractal features quantitatively.Then the differences of fractal characteristics between blanket jamming and white Gaussian noise(WGN)in FRFT domain are described,and a detector to detect the jamming is proposed.At last,simulations are done to verify that the algorithm is effective preferable.更多还原