中文说明：一种变步长LMS的算法，描述了与基本LMS算法的比较，随着迭代次数的增加，变步长的LMS算法达到最优的迭代次数少
English Description：
A variable step size LMS algorithm is described. Compared with the basic LMS algorithm, with the increase of the number of iterations, the variable step size LMS algorithm achieves the optimal number of iterations