有色噪声中谐波频率的频域非线性预滤波估计方法

Sinusoid Frequency Estimation in Colored Noise Based on Nonlinear Prefiltering in Frequency Domain

基于谐波信号表现为频域中的异常点这一思路 ,利用滑动中值滤波器滤除数据异常点的能力 ,本文提出了未知有色噪声背景下谐波信号频率的一种高分辨估计方法 .其突出特点是对噪声分布的强普适性 ,且算法实现简单 .

Based on the observation that sinusoids show themselves as outliers in frequency domain,this paper proposes a new approach for the superresolution frequency estimation of sinusoids in an unknown colored noise environment by utilizing the capability of running median filters to remove outliers from data.The outstanding advantages of the method are its strong adaptability to various noise distributions and the simplicity of its implementing algorithm.Simulations are provided to show its performances.