基于yule_walker,burg,协方差，改进协方差，最大熵方法这五种算法的matlab程序，并且是一个周期正弦信号与高斯白噪声的模型-Yule_walker, burg, covariance, improved covariance method of maximum entropy algorithm matlab these five programs, and is a periodic sinusoidal signal with Gaussian white noise mod