说明：  此源码在matlab环境下运行。此程序功能是：输入采样频率，能够返回高斯滤波器的系数，由连续域经过采样得到离散域的高斯滤波系数。
(This source in the matlab environment. This program features are: input sampling frequency, to return the coefficient of Gaussian filter, after sampling from the continuous domain to be discrete domain Gaussian filter coefficients.)