The improvement on the edf for the higher frequency noise is better than that for the lower frequency noise in the overlapping estimators and the total estimators.

• 而相应的重叠估计和总方法估计与之相反，噪声的频率越高，其等效自由度越大，这也说明重叠估计和相应的总方法估计对高频噪声等效自由度的提高优于低频噪声。