利用高阶矩进行延时估计的方法

Time delay estimation based on higher order moment

采用一种利用高阶矩进行延时估计的方法．该方法利用四阶累积量代替相关法，克服了现有诸多方法仅能用于高斯白噪声中而不能用于高斯色噪声中进行延时估计的缺点．在运算中采用了ＦＦＴ算法，具有运算速度快的优点．实验结果表明该方法是行之有效的．

The method based on higher order moment for time delay estimation is proposed. With correlation method replaced by fourth-order cumulant it has overcome the defect of current methods which can only be performed in the situation of Gaussian white noise while not Gaussiancolored noise. It also possesses the advantages of computing rapidly using FFT algorithm inpractice. The concerned theoretical basis,estimaiton criteria and FFT algorithm are interpretedin detail.The experimental results using this method are provided in the end.