分别采用维纳滤波和l-d算法设计一个6阶前向线性预测器，给出设计过程，matlab程序。

要求：1、得到预测器的权向量和预测误差功率

2、画出预测阶数和预测误差功率的曲线

3、在使用l-d算法时，假设 ， ，…… 未知

-Wiener filter and were used to design a 6-ld algorithm prior to the linear predictor order, given the design process, matlab program. Requirements: 1, are predictors of weight vectors and the prediction error power of 2, draw the prediction order and the prediction error power, Curve 3, in the use ld algorithms, assumptions, ... ... unknown