递推的极大似然估计算法求解系统辨识问题，输入为M序列，噪声影响可调-The recursive maximum likelihood estimation algorithm for system identification problem

该算法包含极大似然估计的梯度算法和快速ica算法，已经调试成功过，调试时注意所给信号x是行向量还是列向量-The algorithm contains the maximum likelihood estimation of the gradient method and fast ica algorithm, has been debugged, debugging attention given signal x is a row vector or column vector