在战场上, 相对于普通运动目标, 微动目标的威胁性越来越大。而采用传统的激光测速系统进行微动目标检测时, 系统精度低, 参数估计算法复杂。为此, 文章提出了一种基于分数阶傅里叶变换的激光微动目标运动参数测量方法。首先给出了激光信号的数学模型, 推导了微动目标运动参数测量算法, 分析了参数估计精度, 最后采用Matlab对算法进行仿真。数值分析表明, 此算法可以有效检测出微动目标的速度和加速度信息, 具有一定的工程应用价值。

On the battlefield, the micro-motion targets are more threatening as opposed to ordinary moving targets. The accuracy of traditional laser velocimetry system is low and the estimation algorithm is complex. In this paper, it is studied a measurement method based on Fractional Fourier transform to detect laser micro-motion target parameters. First, the mathematical model of the laser signal is given, then the micro-motion target parameter measurement algorithm is derived, and the parameter estimation accuracy is analyzed. Finally Matlab is used to simulate the algorithm. The numerical analysis shows that the algorithm can efficiently detect the micro-motion targets’ speed and acceleration information.