Performance simulation of IEEE 802.16e WiMAX physical layer

Hardware implementation of WiMAX systems using field programmable gate array (FPGA) technology is a very important task for mobile communication and wireless network researchers. As a first step, a careful simulation of the system performance has been done using the simulation link platform of matlab_2009. The performance of the simulated system was evaluated using the bit-error-rate (BER). In this part; we have discussed different algorithms of the orthogonal frequency division multiplexing (OFDM), as well as the WiMAX physical layer based on the IEEE 802.16e standard under different combinations of digital modulation schemes and different communication channels. The simulation results show that adaptive modulation achieves similar spectral efficiency with better energy efficiency. When channel conditions are poor, energy efficient schemes such as BPSK or QPSK were used. As channel quality improves, higher M-ary modulation schemes such as16-QAM or 64-QAM was used.