Design and Implementation of a Software Radio Based WiMAX Communication System
This paper presents the design and implementation of a software defined radio for the physical layer implementation of WiMAX using MATLAB and Simulink. This work focuses on two important aspects of communications, WiMAX standard and the OFDM technique. OFDM is a spectrally efficient version of multicarrier modulation, where the subcarriers are selected such that they are all orthogonal to one another over the symbol duration, thereby avoiding the need to have non-overlapping subcarrier channels to eliminate inter-carrier interference. In order to completely eliminate ISI, guard intervals are used between OFDM symbols. By making the guard interval larger than the expected multipath delay spread, ISI can be completely eliminated.