The beat signal model of the stationary, uniform motion and accelerated motion target is sinusoid, Linear Frequency-Modulated (LFM) signal and polynomial-phase signal (PPS) respectively.

• 静止、匀速运动和加速运动三类目标分别对应着正弦信号、线性调频(LFM)信号和多项式相位信号(PPS)三种差频信号模型。