中文说明：
基于FrFT的时变幅度LFM信号参数估计，采用二维峰值搜索算法，后用一维曲线拟合，大大减少了计算量。
English Description：
The parameter estimation of time-varying amplitude LFM signal based on FRFT adopts two-dimensional peak search algorithm, and then uses one-dimensional curve fitting, which greatly reduces the amount of calculation.