中文说明：
信号的频率选择性衰落,根据频率的不同,在某些点上信号增强,某些点上信号减弱,此代码为MATLAB建模的仿真代码,开发环境为matlabR2011B。
English Description：
Signal frequency selective fading, according to the different frequency, signal enhancement at some points, signal weakening at some points, this code for matlab modeling simulation code, development environment for matlab r2011b