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在毫米波雷达目标探测中,目标微动部件的微多普勒效应会引起目标回波频谱扩展,线性调频信号的时频耦合会导致目标距离扩展,从而使得目标难以检测。文中首先通过建模仿真,研究了目标回波的特点,然后结合实测数据分析了其复杂性,在此分析基础上提出了边沿检测、均值滤波质心检测、闭运算质心检测等检测方法,最后通过实测数据处理验证了各种方法的性能。
In the MMW radar target detection, the micro-Doppler effect of the target fretting component causes the target echo spectrum to spread. The time-frequency coupling of the chirp signal will cause the target distance to expand, making the target difficult to detect. Firstly, the characteristics of the target echo are studied through modeling and simulation, and then the complexity of the target echo is analyzed based on the measured data. Based on this analysis, the detection methods of edge detection, mean-filtered centroid detection and closed-operation centroid detection are proposed. Finally, The measured data processing verified the performance of various methods.