Coverage and performance in wimax

Hello I`m a new joiner in this group..
Frankly in need help in study of the coverage n performance in wimax

Here the details:
1. I have to select the propagation model for wimax which one is most suitable
2. I have to apply the frequency reuse pattern and interference
3. I have to write MatLab programs to simulate the wimax
4. Need to evaluate the coverage and CINR results in different propagation model and frequency reuse pattern...

I really dont know where to start this...
Can anyone guide me through the process...
Thanks