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Performance Evaluation of WiMAX/IEEE 802.16 OFDM Physical Layer - page 38 / 107

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Chapter 4

Simulation Model

This chapter discusses the simulation model employed by this research. As we have stated before, our research goal is to evaluate performance of IEEE 802.16 OFDM physical layer. This task involves modeling of the physical layer as well as the propagation environment. Simulation was chosen to be the primary tool for our study. We have employed Matlab™ 6.0 to develop the simulator. Before going for the physical layer setup, let us first de ine the OFDM symbol parameter used in our study.

4.1 OFDM Symbol Parameter

There are two types of OFDM parameters (primitive and derived) that characterize OFDM symbol completely. The later one can be derived from the former one because of fixed relation between them. In our MATLAB implementation of the physical layer, the primitive parameters are specified asO´FDM_ params´ and primitive parameters are calculated as ´IEEE802.16 paparams´ which can be accessed globally. The used OFDM parameters are listed in Table 4.1.

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