In wireless communications, fading is deviation of the attenuation that a carrier-modulated telecommunication signal experiences over certain propagation media. The fading may vary with time, geographical position and/or radio frequency, and is often

This is very good tutorial on MATLAB

地面移动卫星信道仿真程序 考虑雨衰 阴影 和多径影响-Land mobile satellite communication channel simulation program to consider the shadow of rain attenuation and multipath effects