Performance Improvement of WiMax in FEC Codes

IEEE 802.16e, mobile Wi-Max, is a wireless technology used to provide very high data rate over large areas to a large number of users where broadband is unavailable. In mobile wireless environment the channel is hostile and behaves adversely. To combat the fading caused by wirelesschannel IEEE 802.16e uses OFDMA (orthogonal frequency division multiple access) as a transmission scheme based on multicarrier modulation.

To investigate the performance of mobile Wi-Max, its physical layer is simulated using Matlab and bit error rate (BER) performance is observed. Further performance improvement is achieved using forward error correction codes (FEC). Two codes, convolution code (CC) and low density parity check code (LDPC) are considered for this purpose. BER performance is evaluated for these codes under different conditions. Finally, BER performance is compared using different FEC for mobile Wi-max.