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在研究分数阶Fourier域滤波基本理论的基础上,提出了扫频滤波器的工作原理和系统表示。通过对LFM信号和高斯白噪声分离效果仿真,发现分离后信噪比得到了较大提高。仿真实验表明,所提出的分数阶域扫频滤波器在有噪声干扰的情况下能得到较好的干扰分离和滤波效果。
On the basis of studying the basic theory of fractional Fourier domain filtering, the working principle and system representation of the swept filter are proposed. By simulating the separation effect of LFM signal and Gaussian white noise, it is found that the signal-to-noise ratio has been greatly improved after separation. Simulation results show that the proposed fractional-domain swept filter can get better interference separation and filtering effect under noisy interference.