中文摘要：

基于杂波多普勒分布（DDC）模型，该文研究了杂波协方差矩阵的特征值能量分布特点，提出了一种稳健的机载雷达杂波多普勒参数估计方法。该方法对杂波多普勒中心估计的精度和现有常见方法可比拟，而对杂波谱宽估计的精度优于现有常见方法，尤其适用于机载雷达运动目标检测（MTD）等实际应用背景下数据样本较少的情况。仿真实验证明了该方法的有效性。

英文摘要：

Based on the Doppler Distributed Clutter （DDC） model, this paper studies the distribution of eigenvalues of the clutter covariance matrix and proposes a robust algorithm of Doppler parameters estimation for airborne radar. Compared with existing methods, the proposed algorithm has comparable performance for Doppler centroid estimation and shows superiority for Doppler spread estimation. The proposed algorithm is competent for most practical applications of airborne radar such as moving target detection （MTD） using Pulse-Doppler （PD） radar, especially for few sampling case. Numerical simulations prove the effectiveness of the proposed algorithm.