Abstract
WiMAX system performance can be significantly improved to achieve excellent error correction performance by utilizing powerful Forward Error Correction Codes. We present a class of parallel concatenated codes called Multiple Parallel Concatenated Gallager Codes (MPCGC) based on using (LDPC) component codes that is used in IEEE 802.16/WiMAX. Computer simulation results confirm that the proposed MPCGCs-WiMAX system shows better performance with an improvement by 0.3 dB gain when compared to a single long LDPC-WiMAX system. Moreover, by using the proposed coding scheme, lower computational complexity can be achieved than the long LDPC code due to multiple smaller lower codes. The advantages of the MPCGCs structure have the potential to be extended to other applications where reduced complexity and flexibility in forward error control coding are required.