Hi Rami, My graduation project was to design a WiMAX CPE using DSL C6416. If u need any help please contact me at haytham_sief@hotmail.com or +20125539943.
You can use the the well-known OPNET software simulation tool, you can try to negotiate with them to get if you are a college student, you can have it through your college
visit http://www.opnet.com/WiMax/home.html