When the parameter estimation of Damped Exponentials (DE) based scattering center model is considered in real life situation, the noise is always non-Gaussian and has long-tailed distribution.

• 实际条件下，在对基于衰减指数(DE)和模型的雷达目标散射中心参数估计和特征提取时，其噪声背景往往是非高斯的，分布密度函数表现出长拖尾性质。