Simulation of WiMAX Systems

WiMAX (Worldwide Interoperability for Microwave Access) has the potential to impact all forms of telecommunications. In a fixed wireless communication, WiMAX can replace the telephone company´s copper wire networks, the cable TV´s coaxial cable infrastructure while offering Internet Service Provider services. In its mobile variant, WiMAX has the potential to replace cellular networks. However, it still facing real challenge for low complexity and efficient system implementation. It supports NLOS environment with high data rate transmission and high mobility up to 125km/hr. In this paper, two main issues are discussed. The first one presents models for simulating OFDM WiMAX system in Simulink including channel estimation and equalization subsystems in MATLAB functions. Next, the effect of channel estimation error on the performance of MIMO VBLAST receivers in uncorrelated Rayleigh flat fading channels is investigated,