中文说明：产生特定功率谱密度（自相关函数）的高斯色噪声, 利用了高斯随机变量的性质，即 高斯随机变量经过线性系统仍为高斯随机变量，高斯白噪声的功率谱密度为常数
English Description：
Gaussian colored noise with specific power spectral density (autocorrelation function) is generated by using the properties of Gaussian random variables, that is, Gaussian random variables are still Gaussian random variables after passing through the linear system, and the power spectral density of Gaussian white noise is constant