数学方法是部分子空间法，关于小波的matlab复合分析，结合PCA的尺度不变特征变换(SIFT)算法，解耦，恢复原信号。- Mathematics is part of the subspace, Matlab wavelet analysis on complex, Combined with PCA scale invariant feature transform (SIFT) algorithm, Decoupling, restore the original signal.