高阶谱估计被开发出来，一直为人们所关注，只要信号和噪声中有一种是高斯分布，则累量的运用非常方便解决问题！-Higher order spectral estimation have been developed, has been a continuing concern, as long as there is a signal and the noise is Gaussian distribution, the cumulative amount of use is very easy to solve the problem!