prewhitening

With MLE/DC and some coupling between them, the PSD and PDF parameters of colored non-Gaussian data can be estimated correctly.So processing of prewhitening and gaussianizing can be realized.

使用MLE/DC参数估计方法，并在两种方法一定耦合，即可对有色非高斯数据进行准确的功谱和概密度模，进而实现数据的预白与高斯化。