包括：三种LMS算法实现AR(2)的预测，法2、3用递推计算Km,两者区别在于d(n)的取法略微不同；用LSL和FTF算法实现简单的系统辨识。-Include: three LMS algorithm AR (2) the forecast, France 2,3 calculated with recursion Km, whichever is the difference between d (n) of a slightly different取法　LSL and the FTF algorithm with simple system identification.