Measuring capacity of different fading channels under IEEE 802.16m standard

An extensive demonstration by measuring the capacity of different fading channels using water filling algorithm in WiMAX system has been presented in this paper. It is tested for Nakagami-m, lognormal shadowing and Suzuki fading channels with water filling algorithm under IEEE 802.16m standard. It is calculated using 2×2 antennas for downlink system. The simulation work has carried out by using MATLAB^®. It is observed by the simulation results that the Nakagami-m fading channel provides best channel capacity for all values of SNR tested either with or without using water filling algorithm. Thus, we can say that the Nakagami-m fading channel is comparatively best, provide high data rate under IEEE 802.16m standard.