The problem of automatic parasitic chirp components detection and suppression in a digital signal is considered. The detection is based on the calculation of the discrete Wigner distribution accompanied by the Hough transform. The filtration is achieved by a series of discrete fractional Fourier transforms converting the signal to special coordinates, where the entire energy of the parasitic signals is accumulated at a few samples and then reset. The main novelty is the utilization of new construction of discrete fractional Fourier transform coordinated with the discrete Wigner distribution. The advantages of the proposed approach are illustrated by the simulations.

中文翻译：

---

中频域中寄生啁啾信号的自动检测和抑制

考虑了数字信号中寄生线性调频分量的自动检测和抑制问题。检测基于伴随霍夫变换的离散 Wigner 分布的计算。过滤是通过一系列离散分数傅立叶变换将信号转换为特殊坐标来实现的，其中寄生信号的全部能量在几个样本中累积，然后重置。主要新颖之处在于利用与离散 Wigner 分布协调的离散分数傅立叶变换的新构造。所提出的方法的优点通过模拟来说明。