基于列车测速的背景下,针对列车多普勒雷达测速,本文对功率谱估计的问题进行了研究。对常用的功率谱估计方法进行了分析,在列车行驶背景下对各个方法进行了仿真实验对比,选择适合于列车测速的功率谱估计方法,实测数据验证了本文的结论。 Based on the background of train speed measurement, this paper studies the problem of power spectrum estimation for the speed measurement of train Doppler radar. The commonly used method of power spectrum estimation is analyzed, and the comparison of each method under the background of train driving is carried out. The power spectrum estimation method suitable for train speed measurement is selected. The measured data verify the conclusion of this paper.