中文说明：应用背景应用frft对线性调频信号进行检测的程序关键技术应用frft对线性调频信号进行检测的程序，原理是以变换阶数（不同的分数阶域）为变量对观测信号进行分数阶变换，形成信号能量在时频平面上的二维分布，在此平面上按阈值进行峰值点的二维搜索即可检测线性调频信号并估计其参数
English Description：
Application backgroundApplying frft procedures for detection of linear frequency modulation signalKey TechnologyFRFT is used to detect the linear frequency modulation signal. The principle is to transform the signal into the frequency spectrum of the signal energy in the time-frequency plane, and then estimate the parameters of the linear frequency modulation signal by using the two dimensional search of the signal energy.