基于互功率谱的时延估计，可以得到很精确的幅值、频率、相位估计，包括邓氏关联度、绝对关联度、斜率关联度、改进绝对关联度。- Based on the time delay estimation of power spectrum, You can get a very accurate amplitude, frequency, phase estimation, Including Deng s correlation, absolute correlation, correlation of