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The needs of high speed broadband wireless access at lower cost and easy deployment to meet the modern mobile services leads in the emergence of an another IEEE standard called Worldwide Interoperability for Microwave AccesS (WiMAX). The limitations of conventional broadband wireless access have been overcome with the scalable features of WiMAX. The main purpose of this paper is to evaluate, analyze and compare the performance of a WiMAX under different data rate. For this purpose a simulation model of WiMAX transmitter and receiver has been designed using Simulink in MATLAB. The model presented in this paper using, outer coding and interleaving, inner coding and interleaving, constellation and mapping blocks of encoder and decoder are implemented.
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