本文对几种经典的多普勒中心频率估计算法的从滤波的角度加以分析，分析了符号相关算法的实质，并提出一种了简单适用的非线性滤波方法，对雷达回波方位功率谱周期图进行平滑，在满足成象要求下，可以快速估计出多普勒中心频率。 In this paper, we analyzed several classic Doppler center frequency estimation algorithms from the filtering point of view, analyzed the essence of the symbol correlation algorithm, and proposed a simple and applicable nonlinear filtering method to analyze the radar echo azimuth power spectrum period Figure smoothing, to meet the imaging requirements, you can quickly estimate the Doppler center frequency.